St. Louis, MO to DeKalb, IL Flights

Cheap plane tickets from St. Louis, MO to DeKalb, IL can start from as little as $340 (€271) when you book in advance. The average flight ticket price for St. Louis, MO to DeKalb, IL is $386 (€307) ; 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 31m 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.

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.

The cheapest month for a flight from St. Louis, MO to DeKalb, IL is May.

It's helpful to compare your options as there are 3 ways to travel between St. Louis, MO and DeKalb, IL including taking a bus, train, and flight.

Since neither St. Louis, MO nor DeKalb, IL are in the Schengen Area, passport requirements depend on the specific immigration rules of United States and United States. Entry and visa requirements can be subject to change. For the latest information, check with your destination's embassy or consulate.

There is no time difference 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.