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Journey information
Overview: St. Louis, MO to DeKalb, IL flight
USAUSA
Flights from St. Louis, MO to DeKalb, IL depart on average 41 times per day, taking around 4h 20m. Cheap flight tickets for this journey start at $374 but you can travel from only $54 by train.
There are 11 flights per day. The earliest flight runs at 05:01, the last at 22:38. The fastest flight covers the 240 miles (387 km) distance in 1h 23m. September 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
Train from $54
Distance 240 miles (387 km) |
Average flight duration 4h 20m |
Cheapest ticket price $374 |
Flights per day 41 |
Direct flights 11 |
Fastest flight 1h 23m |
First flight 5:01 AM |
Last flight 10:38 PM |
Cheapest Month Sep |
Cheapest Day Sun |
High Season Jul - Sep |
Low Season Apr - Jun |
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
Train from $54
Why should you book St. Louis, MO to DeKalb, IL flights with Omio?
Republic Airlines as well as United or skywest airlines offer flights services from St. Louis, MO to DeKalb, IL.
Omio is the only official third party seller for Republic Airlines tickets.
Why book with Omio vs Republic Airlines?
- Compare with other providers: On Omio, you can not only buy tickets for Republic Airlines, but also compare tickets for the likes of United or skywest airlines to find the best option for your trip from St. Louis, MO to DeKalb, IL.
- Designed for International Travelers: Omio is in your language including 24/7 customer service and offers multiple payment options, including PayPal, credit cards, and bank transfer, in your preferred currency.
Airlines: United, Republic Airlines, skywest airlines from St. Louis, MO to DeKalb, ILFind the best flights between St. Louis, MO to DeKalb, IL with Omio's travel partners United, Republic Airlines, skywest airlines from $54. We can find you the best deals, schedules and tickets when comparing and booking the best trip.
United
About
United Airlines, established in 1926, is a major U.S. airline headquartered in Chicago, Illinois. Operating an extensive domestic and international network, United serves more destinations than any other airline, connecting travelers across six continents. The airline's eight hubs include Chicago–O'Hare, Denver, Houston–Intercontinental, Los Angeles, Newark, San Francisco, Washington–Dulles, and Guam. As a founding member of the Star Alliance, United offers a comprehensive range of services, including regional flights through United Express, catering to both leisure and business travelers. The airline is committed to sustainability, investing in sustainable aviation fuel and innovative technologies to reduce its environmental impact.
Luggage & cancellation policy
Average United Duration
1h 23m
Cheapest United Price
$374
United frequency
38 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.
skywest airlines
About
SkyWest Airlines is a major North American regional airline headquartered in St. George, Utah. It operates flights for larger carriers such as Alaska Airlines (as Alaska SkyWest), American Airlines (as American Eagle), Delta Air Lines (as Delta Connection), and United Airlines (as United Express). SkyWest is the largest regional airline in North America by fleet size, passengers carried, and destinations served. The airline connects passengers to over 250 destinations across the United States, Canada, and Mexico, primarily linking smaller airports to major airline hubs. SkyWest's fleet consists of regional jets, including the Bombardier CRJ series and Embraer 175 aircraft.
Luggage & cancellation policy
Average skywest airlines Duration
1h 29m
Cheapest skywest airlines Price
$374
skywest airlines frequency
1 a day
Luggage included
One carry-on bag and one personal item are allowed for free.
Additional luggage
Additional luggage can be purchased, and fees apply for excess, oversized, or overweight baggage.
Cancellation Policy
If canceled within 24 hours of purchase, a full refund is possible, provided the departure is at least 7 days away; after 24 hours, fees range from $100 to $500.
Refund
If SkyWest Airlines cancels a flight, passengers are eligible for a full refund.
Pregnant on board
Being pregnant on board is allowed, but specific policies may depend on the partner airline.
Unaccompagned minor
Children aged 5-14 can travel alone using the unaccompanied minor service, which includes airport escort and supervision.
Amenities on board the airplane
Seat reservation
Toilets
Accessibility
SkyWest Airlines complies with all provisions of the Air Carrier Access Act and accommodates customers with special needs.
Bikes
Bicycles can be checked in but may incur additional fees and must be properly packed.
Pets
Small pets like cats and dogs are allowed in the cabin for a fee, with restrictions on pet and carrier size.
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 Republic Airlines Duration
1h 30m
Cheapest Republic Airlines Price
$374
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 DeKalb, IL Flight
Find answers to the most common questions about traveling from St. Louis, MO to DeKalb, 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 DeKalb, IL, this guide helps you travel smarter and with confidence.
Cheap plane tickets from St. Louis, MO to DeKalb, IL can start from as little as $374 when you book in advance. The average flight ticket price for St. Louis, MO to DeKalb, IL is $697 ; however, prices vary depending on the time of day and class and they tend to be more expensive on the day.
The average journey time by plane from St. Louis, MO to DeKalb, IL is 1h 23m to travel the 240 miles (387 km) long route. Journey times can vary on weekends and holidays, so use our Journey Planner to search for a specific date.
The earliest flight from St. Louis, MO to DeKalb, IL leaves at 5:01 AM. Plan your trip with the Journey Planner from Omio.
The latest flight from St. Louis, MO to DeKalb, IL leaves at 10:38 PM.
Yes, there are 11 direct flights a day from St. Louis, MO to DeKalb, IL with Republic Airlines, United, skywest airlines. Schedules can vary on holidays or weekends with fewer direct flights.
When taking a flight from St. Louis, MO to DeKalb, IL, you can count on Republic Airlines, United, skywest airlines for the best way to get you to DeKalb, IL. You can also check all possible airlines who offer a service between St. Louis, MO and DeKalb, IL and compare the amenities they offer before buying a plane ticket.
Flights from St. Louis, MO to DeKalb, IL generally leave from St. Louis Lambert International Airport and arrive in O'Hare International Airport.St. Louis Lambert International Airport is 1 miles (2 km) away from St. Louis, MO city centre and O'Hare International Airport is 1 miles (3 km) from DeKalb, IL city centre.
Yes, you can take a between St. Louis, MO and DeKalb, IL.
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.
The currency used in the United States is the US Dollar (USD). For travelers, using cards is generally more convenient and widely accepted, especially credit and debit cards, while cash is useful for small purchases or places that do not accept cards.
In DeKalb, IL, travelers should be cautious of petty crimes such as pickpocketing and vehicle break-ins, especially in crowded or tourist-frequented areas. Common scams include overcharging by unofficial taxi services or vendors. It is advisable to use licensed transportation and remain aware of surroundings, particularly at night, to ensure safety.
Pack lightweight, versatile clothing suitable for the destination's climate, and use secure, lockable luggage to protect belongings. Keep essential items like travel documents, medication, and valuables in a carry-on bag for easy access. Use packing organizers or cubes to maximize space and maintain order. Lastly, include a small first aid kit and personal hygiene items for added comfort during travel.
popular airports
Popular airports from St. Louis, MO to DeKalb, IL
Most St. Louis, MO to DeKalb, IL flights use the St. Louis Lambert International Airport to O'Hare International Airport airport pair. Use this guide to compare St. Louis, MO and DeKalb, IL airports on this route, check city-centre transport, alongside checking practicalities like airport facilities and services.
Departure airports in St. Louis
Arrival airports in DeKalb
Which St. Louis, MO airport do flights to DeKalb, IL leave from?
Flights from St. Louis, MO to DeKalb, IL depart from St. Louis Lambert International Airport. The airport is 1 miles (2 km) from St. Louis, MO city centre at 10701 Lambert Intertiol Blvd, St. Louis, MO 63145, USA.
St. Louis Lambert International Airport (STL)10701 Lambert Intertiol Blvd, St. Louis, MO 63145, USA
City-centre transport
Getting to St. Louis Lambert International Airport from St. Louis city centre
St. Louis Lambert International Airport is 2 km from St. Louis city centre. Public transport options include:
TrainMlr · 31m · $4 · every ~7 min
BusGreyhound US1210 · 25m · $3
St. Louis Lambert International Airport airport facilities and services
St. Louis Lambert International Airport has practical services for this route, including Wifi, Shopping, Parking, Dining, ATM, Taxis, Accessibility, WC, Hotel, Shower, Lounge, Lost and Found Office, and Car Rental.
Food and drink
Food options include: Restaurants in both terminals, including fast food and sit-down options like Starbucks and Chili's
Wi-Fi and ATMs
Free Wi-Fi available throughout the airport. ATMs are located in both terminals.
Luggage and lost property
Lost and found is available at the station.
Parking, taxis and toilets
Available at St. Louis Lambert International Airport: Parking, Taxis, WC.
Bike and car services
Available at St. Louis Lambert International Airport: Car Rental.
Accessibility
Accessibility facilities are available at St. Louis Lambert International Airport: Elevators, ramps.
Shops, hotels and contact
Nearby hotels include Hotels nearby, such as Marriott St. Louis Airport within walking distance..
Most popular flights from St. Louis, MO
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