St. Louis, MO STL to Chicago, IL CHI flight with United

Tue, Nov 25
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Republic Airlines
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Journey information

Overview: St. Louis, MO to Chicago, IL flight

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Icon of flight

Flights from St. Louis, MO to Chicago, IL depart on average 10 times per day, taking around 1h 21m. Cheap flight tickets for this journey start at $310 (€253) but you can travel from only $34 (€28) by bus.

There are 4 flights per day. The earliest flight runs at 00:15, the last at 23:55. The fastest flight covers the 260 miles (419 km) distance in 1h 22m. May is the cheapest month to fly.

Fares are the lowest economy prices found on Omio. Early booking often means lower prices. Prices change daily and are subject to availability. Discount cards, coach trips, and booking fees are not included.
Price information
Cheapest alternative travel mode
Bus from $34 (€28)
Distance
260 miles (419 km)
Average flight duration
1h 21m
Cheapest ticket price
$310 (€253)
Flights per day
10
Direct flights
4
Fastest flight
1h 22m
Cheapest month to travel
May
First flight
00:15
Last flight
23:55

Key Takeaways

Train Ticket Prices
  • Budget Options: Train tickets from St. Louis, MO to Chicago, IL start from as low as $310 (€253) if booked well in advance.
  • Standard Fares: Typically, trains cost $387 (€316) depending on the train type and class.
Journey Duration & Frequency
  • On average there are 10 daily trains from St. Louis, MO to Chicago, IL with 4 direct service.
  • The fastest trains can take as little as 1h 22m but the average duration is 1h 21m
Train Operators
  • Travel from St. Louis, MO to Chicago, IL with United, American Airlines, and Republic Airlines
  • The most booked train company for this route on Omio is United.
Stations & Schedule
  • Most trains depart from St. Louis Lambert International Airport and arrive in O'Hare International Airport
  • First train typically departs at 12:15 AM and the last at 11:55 PM
Fares are the lowest economy prices found on Omio. Early booking often means lower prices. Prices change daily and are subject to availability. Discount cards, coach trips, and booking fees are not included.
Price information
Cheapest alternative travel mode
Bus from $34 (€28)

The cheapest and fastest flights from St. Louis, MO to Chicago, IL

Showing times and prices for Nov 26

Cheapest price

$423

Average price

$744

Fastest journey

1 h 23 m

Average duration

1 h 27 m

Flights per day

43

Distance

419 km

Cheap tickets

The best way to find a cheap flight ticket from St. Louis, MO to Chicago, IL is to book your journey as far in advance as possible and to avoid traveling at rush hour.

The average ticket from St. Louis, MO to Chicago, IL will cost around $744 if you buy it on the day, but the cheapest tickets can be found for only $423.

Fast flights

Of the 43 flights that leave St. Louis, MO for Chicago, IL onWed, Nov 26, 14 travel direct so it’s quite easy to avoid journeys where you’ll have to change along the way.

On Wed, Nov 26 the direct flights cover the 419 km distance in an average of 1 h 27 m but if you time it right, some flights will get you there in just 1 h 23 m .

On Wed, Nov 26 the longest flights will take 1 h 29 m and usually involve a change or two along the way, but you might be able to save a few pennies if you’re on a budget.

UnitedUA3597
06:43PM1h30
St. Louis Lambert International Airport
08:13PMO'Hare International Airport
$4231One-way
0 transfers
Sky West AirlinesAA4924
07:58PM1h31
St. Louis Lambert International Airport
09:29PMO'Hare International Airport
$4231One-way
0 transfers
Republic AirlinesAA4595
04:46PM1h35
St. Louis Lambert International Airport
06:21PMO'Hare International Airport
$4231One-way
0 transfers
UnitedUA4423
06:30AM1h29
St. Louis Lambert International Airport
07:59AMO'Hare International Airport
$4231One-way
0 transfers
UnitedUA3611
03:14PM1h30
St. Louis Lambert International Airport
04:44PMO'Hare International Airport
$4231One-way
0 transfers

Travel Information

Compare train, bus, and flight for St. Louis, MO to Chicago, IL

Omio recommends booking the train as it is the most popular option from St. Louis, MO to Chicago, IL among Omio's users. If you are prioritising price take the bus with prices starting from €28. For those with little time consider booking a flight which can get you there in 1h 21m. In case you are seeking to minimise your carbon footprint the train is your best bet as it emits only 0.1 - 0.4kg. The ticket price range depends on the travel mode: a bus costs an average of €28, and a flight costs an average of €253.

Distance: 260 miles (419 km)

Compare flight with

Flight
Most popular
Train
Bus

€316

Average price

€45

Average price

€45

Average price

Cheapest

4h 21m

Average total duration

Fastest

1h 21m

Onboard

+

3h 0m

Additional time*

5h 40m

Average total duration

5h 10m

Onboard

+

30m

Additional time*

6h 50m

Average total duration

6h 20m

Onboard

+

30m

Additional time*

1.3 - 2.5kg

CO2 emissions

0.1 - 0.4kg

CO2 emissions

Lowest

0.4 - 1.0kg

CO2 emissions

United

Most popular airline

Amtrak

Most popular train company

Greyhound

Most popular bus company

Direct Options

Direct Options

Direct Options

Additional time: Average total travel duration to departure point, security checks and transfers.

Live departures

St. Louis, MO to Chicago, IL flight times

The table below shows live departures for St. Louis, MO to Chicago, IL flights for today, Tuesday, November 25. You can also manually refresh the results below to see updated flight journeys.

Last updated at 6:46 AM
ProviderDepartsDurationArrivesTransfers
Tickets
republic_airlinesAA457212:00 PM St. Louis Lambert International Airport
1h30
1:30 PM O'Hare International Airport0 transfersDirect
unitedUA1371 · UA2166 · UA121112:15 PM St. Louis Lambert International Airport
8h32
8:47 PM O'Hare International Airport2 transfers
unitedUA442312:30 PM St. Louis Lambert International Airport
1h29
1:59 PM O'Hare International Airport0 transfersDirect
unitedUA3432 · UA2621:00 PM St. Louis Lambert International Airport
7h40
8:40 PM O'Hare International Airport1 transfer
unitedUA3432 · UA1359 · UA10461:00 PM St. Louis Lambert International Airport
12h57
1:57 AM O'Hare International Airport2 transfers
unitedUA3432 · UA18751:00 PM St. Louis Lambert International Airport
6h14
7:14 PM O'Hare International Airport1 transfer
unitedUA3432 · UA3606 · UA4261:00 PM St. Louis Lambert International Airport
7h38
8:38 PM O'Hare International Airport2 transfers
unitedUA41832:00 PM St. Louis Lambert International Airport
1h29
3:29 PM O'Hare International Airport0 transfersDirect
unitedUA2480 · UA1719 · UA13242:20 PM St. Louis Lambert International Airport
8h33
10:53 PM O'Hare International Airport2 transfers
unitedUA2480 · UA24172:20 PM St. Louis Lambert International Airport
6h34
8:54 PM O'Hare International Airport1 transfer
unitedUA2480 · UA1388 · UA15642:20 PM St. Louis Lambert International Airport
10h34
12:54 AM O'Hare International Airport2 transfers
unitedUA2480 · UA1719 · UA15642:20 PM St. Louis Lambert International Airport
10h34
12:54 AM O'Hare International Airport2 transfers
unitedUA4506 · UA471 · UA5162:25 PM St. Louis Lambert International Airport
8h40
11:05 PM O'Hare International Airport2 transfers
unitedUA4506 · UA471 · UA10462:25 PM St. Louis Lambert International Airport
11h32
1:57 AM O'Hare International Airport2 transfers
unitedUA4506 · UA4187 · UA23942:25 PM St. Louis Lambert International Airport
8h40
11:05 PM O'Hare International Airport2 transfers
unitedUA4506 · UA23312:25 PM St. Louis Lambert International Airport
5h30
7:55 PM O'Hare International Airport1 transfer
skywest_airlinesAA63082:39 PM St. Louis Lambert International Airport
1h38
4:17 PM O'Hare International Airport0 transfersDirect
unitedUA1396 · UA28653:00 PM St. Louis Lambert International Airport
5h48
8:48 PM O'Hare International Airport1 transfer
unitedUA43994:00 PM St. Louis Lambert International Airport
1h29
5:29 PM O'Hare International Airport0 transfersDirect
unitedUA43955:05 PM St. Louis Lambert International Airport
1h29
6:34 PM O'Hare International Airport0 transfersDirect
unitedUA6213 · UA1964 · UA15175:20 PM St. Louis Lambert International Airport
10h27
3:47 AM O'Hare International Airport2 transfers
unitedUA1706 · UA2545:35 PM St. Louis Lambert International Airport
8h32
2:07 AM O'Hare International Airport1 transfer
unitedUA1706 · UA6615:35 PM St. Louis Lambert International Airport
6h59
12:34 AM O'Hare International Airport1 transfer
unitedUA44986:31 PM St. Louis Lambert International Airport
1h29
8:00 PM O'Hare International Airport0 transfersDirect
unitedUA4454 · UA17387:10 PM St. Louis Lambert International Airport
10h33
5:43 AM O'Hare International Airport1 transfer
unitedUA2625 · UA14117:35 PM St. Louis Lambert International Airport
7h23
2:58 AM O'Hare International Airport1 transfer
unitedUA2625 · UA19237:35 PM St. Louis Lambert International Airport
6h05
1:40 AM O'Hare International Airport1 transfer
skywest_airlinesAA63328:17 PM St. Louis Lambert International Airport
1h29
9:46 PM O'Hare International Airport0 transfersDirect
unitedUA36119:14 PM St. Louis Lambert International Airport
1h30
10:44 PM O'Hare International Airport0 transfersDirect
envoy_airAA34619:43 PM St. Louis Lambert International Airport
1h25
11:08 PM O'Hare International Airport0 transfersDirect
unitedUA6255 · UA129310:35 PM St. Louis Lambert International Airport
7h40
6:15 AM O'Hare International Airport1 transfer
unitedUA6255 · UA175210:35 PM St. Louis Lambert International Airport
6h35
5:10 AM O'Hare International Airport1 transfer
unitedUA696 · UA37710:43 PM St. Louis Lambert International Airport
7h16
5:59 AM O'Hare International Airport1 transfer
unitedUA696 · UA225810:43 PM St. Louis Lambert International Airport
6h07
4:50 AM O'Hare International Airport1 transfer
republic_airlinesAA459510:46 PM St. Louis Lambert International Airport
1h35
12:21 AM O'Hare International Airport0 transfersDirect
unitedUA205911:30 PM St. Louis Lambert International Airport
1h22
12:52 AM O'Hare International Airport0 transfersDirect
unitedUA3424 · UA196511:31 PM St. Louis Lambert International Airport
6h03
5:34 AM O'Hare International Airport1 transfer
Wednesday, November 26
unitedUA359712:43 AM St. Louis Lambert International Airport
1h30
2:13 AM O'Hare International Airport0 transfersDirect
skywest_airlinesAA49241:58 AM St. Louis Lambert International Airport
1h31
3:29 AM O'Hare International Airport0 transfersDirect

This is the last flight of the day.

Find all the dates and times for this journey

How far in advance should I book flight tickets from St. Louis, MO to Chicago, IL?

The best time to book your flight from St. Louis, MO to Chicago, IL is 49 days before departure. See how prices for flights change on the St. Louis, MO to Chicago, IL route.
Prices are for one-way tickets for one passenger from St. Louis, MO to Chicago, IL per month. Insights are sourced from fares found by Omio users in the last 12 months. Current prices may differ as prices vary depending on the time of day, class or how far in advance you book your flight from St. Louis, MO to Chicago, IL.

Compare prices and tickets St. Louis, MO to Chicago, IL by train, bus, or flight

Compare train, bus, and flight prices over the next three weeks. See the best deals at a glance, find the lowest fares, and choose the option that fits your budget.

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Airlines: United, American Airlines, Republic Airlines from St. Louis, MO to Chicago, ILFind the best flights between St. Louis, MO to Chicago, IL with Omio's travel partners United, American Airlines, Republic Airlines from $34 (€28). We can find you the best deals, schedules and tickets when comparing and booking the best trip.

United

About
United Airlines is one of the USA’s leading carriers, operating both domestic and international routes. For your next trip, you can choose from Economy, Premium Economy, and Business Class fares.
Luggage & cancellation policy
Average Duration
1h 25m
Cheapest Price
$334 (€272)
United frequency
7 a day
Luggage included
Carry-on baggage allowance is 7kg total (2 pieces max. ) for both Choice and Flex fares on United Airlines and Virgin Australia flights.
Additional luggage
Excess baggage fees apply for additional checked luggage beyond the standard allowance.
Luggage storage
Both airlines provide checked baggage services for storing luggage during flights.
Cancellation Policy
Cancellation fees apply per person, per booking, with specific fees for different fare types.
Refund
Not applicable to flights; however, full refunds are available if flights are canceled by the airline.
Pregnant on board
Pregnant passengers are permitted to travel, with specific guidelines and medical certificates required after a certain gestational period.
Unaccompagned minor
Unaccompanied minors are permitted to travel, with specific age restrictions and services provided.
Amenities on board the airplane
Wifi
Food sold onboard
Meals and snacks are included on international flights operated by United Airlines and Virgin Australia.
Seat reservation
Seat selection may incur additional fees, depending on the fare type and airline.
Toilets
USB plugs
Accessibility
United Airlines and Virgin Australia offer services to and within Australia, providing accessible travel options for passengers with mobility needs.
Bikes
Both airlines permit bicycles onboard, with specific guidelines and fees.
Pets
United Airlines and Virgin Australia allow pets onboard, subject to specific policies and fees.

American Airlines

About
American Airlines is one of the largest airlines in the world, connecting travelers to hundreds of destinations across the United States, Latin America, Europe, Asia, and beyond. Operating from major hubs such as Dallas/Fort Worth, Miami, and Charlotte, American offers a wide range of travel options. Passengers can choose from Economy with affordable fares, Premium Economy with extra space, or Business and First Class featuring flat-bed seats, premium dining, and lounge access. With a modern fleet and membership in the oneworld alliance, American Airlines combines global reach with comfort and reliability.
Luggage & cancellation policy
Average Duration
1h 21m
Cheapest Price
$351 (€286)
American Airlines frequency
2 a day
Luggage included
1 carry-on bag (22 x 14 x 9 inches) and 1 personal item (18 x 14 x 8 inches) included in most fares
Additional luggage
Checked bags fees vary by route. First checked bag typically $30, second $40 on domestic flights
Cancellation Policy
Basic Economy tickets cannot be changed or refunded. Other fares allow changes with fee, refunds subject to fare rules.
Pregnant on board
Passengers can fly up to 36 weeks for single pregnancies, 32 weeks for multiple pregnancies. Medical certificate required within 7 days of departure if within 4 weeks of due date.
Unaccompagned minor
Children ages 5-14 can travel alone using American Airlines Unaccompanied Minor Service. Service fee is $150 each way.
Amenities on board the airplane
Wifi
Food sold onboard
USB plugs
Accessibility
American Airlines provides wheelchair assistance and special services for passengers with disabilities. Assistance must be requested at least 48 hours before departure.
Pets
Small dogs and cats allowed in cabin for $125 fee. Must be in approved carrier under seat. Service animals allowed.

Republic Airlines

About
Republic Airways is a major regional airline in the United States, operating as a subsidiary of Republic Airways Holdings. It provides scheduled passenger service for American Airlines (as American Eagle), Delta Air Lines (as Delta Connection), and United Airlines (as United Express) using a fleet of Embraer 170 and 175 regional jets. Headquartered in Indianapolis, Indiana, Republic Airways operates over 900 daily flights to more than 80 cities across the U.S. and Canada. The company is known for its large fleet of Embraer E-Jets and its state-of-the-art training facilities. In April 2025, Republic Airways Holdings announced its acquisition of Mesa Air Group, which is expected to create the second-largest regional carrier in the U.S.
Luggage & cancellation policy
Average Duration
1h 22m
Cheapest Price
$380 (€310)
Republic Airlines frequency
2 a day
Luggage included
One carry-on bag (24 x 16 x 10) and one personal item
Additional luggage
Checked bags for a fee
Cancellation Policy
Tickets are non-refundable but may be cancelled for future flight credit minus applicable fees
Pregnant on board
Passengers can fly up to the end of their 36th week for single pregnancies and the end of their 32nd week for multiple pregnancies
Unaccompagned minor
Unaccompanied minor service is available for children ages 5-14. Must be booked directly with Republic Airlines
Amenities on board the airplane
USB plugs
Accessibility
Republic Airlines offers assistance for passengers with reduced mobility, including wheelchair services and priority boarding. Passengers are advised to request these services in advance to ensure availability and proper arrangements.

FAQs: St. Louis, MO to Chicago, IL Flight

Find answers to the most common questions about traveling from St. Louis, MO to Chicago, IL by flight. From journey times and ticket prices to direct connections, first and last departures, and even whether the route is scenic, our FAQs cover everything you need to plan your trip. Whether you’re looking for the fastest flight, the cheapest option, or tips for making the most of your visit at Chicago, IL, this guide helps you travel smarter and with confidence.

FAQs
Cheap plane tickets from St. Louis, MO to Chicago, IL can start from as little as $51 (€42) when you book in advance. The average flight ticket price for St. Louis, MO to Chicago, IL is $217 (€177); however, prices vary depending on the time of day and class and they tend to be more expensive on the day.
On average the St. Louis, MO to Chicago, IL flight travel time is 1 h 16 min   for the 259 mile (418 km) long journey, but the duration can vary if you travel on weekends and holidays.
The earliest flight from St. Louis, MO to Chicago, IL leaves at 5: 36AM. Plan your trip with the Journey Planner   from Omio.
The latest flight from St. Louis, MO to Chicago, IL leaves at 10: 05PM.
Yes, there are 3 direct flights a day from St. Louis, MO to Chicago, IL with United. Schedules can vary on holidays or weekends with fewer direct flights.
For the trip from St. Louis, MO to Chicago, IL you can take a flight with American Airlines, United or Republic Airlines. Be sure to check out all possible airlines that offer services between St. Louis, MO and Chicago, IL on Omio to compare what amenities they may have.
The cheapest month for a flight from St. Louis, MO to Chicago, IL is April.
You have options as you can travel to Chicago, IL from St. Louis, MO 3 different ways: train, bus or flight.
Since neither St. Louis, MO nor Chicago, IL are in the Schengen Area, passport requirements depend on the specific immigration rules of USA and USA. Entry and visa requirements can be subject to change. For the latest information, check with your destination's embassy or consulate.
The best events to attend in Chicago, IL include:
  • Chicago Air and Water Show, an exhilarating display of military and civilian aircraft performing daring maneuvers over Lake Michigan
  • Lollapalooza, a massive music festival featuring top artists across multiple genres in Grant Park
  • Chicago Gourmet, a premier culinary event celebrating the city's vibrant food scene with tastings, cooking demonstrations, and wine pairings.
The best holidays to experience in Chicago, IL include:
  • Memorial Day, the unofficial start of summer with vibrant outdoor activities and events
  • Independence Day, spectacular fireworks and festive celebrations throughout the city
  • Labor Day, a lively atmosphere with various festivals and pleasant weather.
The best seasons to visit Chicago, IL are Spring or Summer. The best weather to explore Chicago, IL is during May-September.
For domestic flights we recommend to arrive 1.5 to 2 hours before departure. Please check the website of your departure airport if in doubt. Some airports may offer booking time slots for security checks or offer additional information on when to get there based on time of day.
Most airlines permit carry-on bags that fit within specific dimensions (e. G. 22 x 14 x 9 inches or 56 x 36 x 23 cm), including handles and wheels. Bags must fit in the overhead bin or under the seat in front of you.
Many airlines impose weight limits, commonly ranging between 7 kg (15 lbs) and 12 kg (26 lbs).
Typically, passengers are allowed one carry-on bag and one personal item (for example a purse, laptop bag, or backpack). Personal items must fit under the seat in front of you.
Budget Airlines (like Ryanair or Wizz Air) have stricter size and weight limits, often requiring fees for larger carry-ons. Full-Service Airlines have more lenient policies, sometimes including more spacious dimensions or higher weight limits depending on your ticket class.
The list of items prohibited on an airplane varies by country and airline, but in general, the following items are not allowed in carry-on or checked baggage: Weapons and self-defence items, sharp objects, flammable materials, explosives, toxic substances, or liquids over 100ml (except for medications and baby essentials). In checked baggage, firearms (without authorization), explosives, large lithium batteries, and hazardous chemicals are prohibited. Electronic cigarettes must be in carry-on bags, while alcohol and dry ice have restrictions. Always check with your airline for specific regulations.

popular airports

Popular airports from St. Louis, MO to Chicago, IL

St. Louis
Chicago
The major airport for departures in St. Louis is St. Louis Lambert International Airport. Find all the information you need to know about services, amenities and connections at St. Louis Lambert International Airport for your trip from St. Louis to Chicago.
Amenities at airport
WifiWifi
ShoppingShopping
ParkingParking
DiningDining
ATMATM
TaxisTaxis
AccessibilityAccessibility
WCWC
HotelHotel
ShowerShower
LoungeLounge
Lost and Found OfficeLost and Found Office
Car RentalCar Rental
information
ticketOfficeHours
Distance to city center
2 km
carConnection
Car connection
I-70, Exit 236
Wifi
Wifi
  • Free Wi-Fi available throughout the airport.
Shopping
Shopping
  • Shops in both terminals, including Hudson News and Tech on the Go.
Parking
Parking
  • Parking available with short-term and long-term options, approximately 1.42€ ($1.50) per hour.
Dining
Dining
  • Restaurants in both terminals, including fast food and sit-down options like Starbucks and Chili's
Taxis
Taxis
  • Available outside the terminal.
Accessibility
Accessibility
  • Elevators, ramps
WC
WC
  • Available throughout both terminals.
Hotel
Hotel
  • Hotels nearby, such as Marriott St. Louis Airport within walking distance.
Shower
Shower
  • Showers available in some lounges, access may require lounge fee.
Lounge
Lounge
  • Lounges available, including American Airlines Admirals Club.
Lost and Found Office
Lost and Found Office
  • Lost and Found located in terminal 1, contact airport for details.
Car Rental
Car Rental
  • Car rental services available, including Hertz and Enterprise in terminal 1
Public transit options for St. Louis Lambert International Airport
  • MetroLink Red Line, Lambert Airport terminal 1 & 2 stations, 35 minutes

Most popular flights to and from Chicago, IL and St. Louis, MO

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