Route guide
Cheap Flights from Chicago to St. Louis: Book Airline Tickets
- Distance
- about 260 mi
- Typical flight time
- 45 min – 1 h 45 min
- Airports
- 2 × 1
- Time difference
- None
This page covers the practical side of flying between Chicago and St. Louis: which airports to compare, how long the trip takes, and when it is busy. It works for either direction. For a price on your dates, ask a specialist.
Quick answer: Chicago to St. Louis is about 260 miles (420 km) and a typical flight takes 45 min to 1 h 45 min. There is no time difference. Chicago has 2 airports to compare and St. Louis has 1.
Airport pairs to compare
Chicago has two main airports: O'Hare handles hub and long-haul traffic, while Midway is smaller and closer to the city center. St. Louis has one main airport with a light rail link to downtown.
| Pair | Departure airport | Arrival airport |
|---|---|---|
| ORD to STL | O'Hare International | St. Louis Lambert International |
| MDW to STL | Midway International | St. Louis Lambert International |
About the airports
- ORD · O'Hare International
A major hub for connecting traffic and long-haul flights, with a direct train to downtown. - MDW · Midway International
Closer to downtown and served by its own train line, with a focus on shorter domestic routes. - STL · St. Louis Lambert International
The main airport, northwest of downtown and linked to the city by MetroLink light rail.
Airlines with a major base at either end
- At Chicago: United Airlines, American Airlines, Southwest Airlines
Airlines with a base at one end often connect through their hub. A specialist can compare nonstop and connecting options on your dates.
When to go and what to expect
Chicago
Late spring through early fall is the most pleasant stretch. Winter brings snow and cold that can cause delays.
St. Louis
Spring and fall are the most comfortable seasons. Summers are hot and humid, and winter can bring snow and ice.
How long is Chicago to St. Louis?
At about 260 miles, Chicago to St. Louis is a short hop. On a route this short the trip to the airport, security and boarding can take as long as the flight itself, so compare total door-to-door time and pick the airport that is easiest for you to reach, not only the cheapest fare.
Getting between the airport and town
Chicago: CTA trains run from both airports to the city center, which is usually the most predictable option at busy times.
St. Louis: MetroLink light rail runs from the airport to downtown St. Louis. Taxis, ride-hail and rental cars are also available.
Planning ground transport too? See our car rental guide.
Good to know
- Check every airport pairing when you compare fares. Schedules and airline options can differ between them.
- Winter weather is the main source of disruption. Build in extra buffer for connections between November and March.
- Winter storms and summer thunderstorms are the usual causes of delays, so leave extra connection time in those seasons.
- Compare the total with bags included, not just the base fare. See baggage fees and taxes and fees.
Flying St. Louis to Chicago?
This route guide works in both directions. For other trips, see all flights from Chicago or all flights from St. Louis.
Frequently asked questions
How far is Chicago from St. Louis?
The straight-line distance between the main airports is about 260 miles (420 km). Routes can be longer in practice because of air traffic and weather.
How long is a flight from Chicago to St. Louis?
A typical scheduled flight takes roughly 45 min to 1 h 45 min in the air, depending on winds, the aircraft and the airports. Connecting itineraries take longer, and nonstop availability depends on the airline and dates.
Which airports can I use?
At Chicago: ORD (O'Hare International), MDW (Midway International). At St. Louis: STL (St. Louis Lambert International). Ask for prices on more than one pairing.
Is there a time difference?
There is no time difference.
When is the best time to fly from Chicago to St. Louis?
In Chicago: Late spring through early fall is the most pleasant stretch. Winter brings snow and cold that can cause delays. In St. Louis: Spring and fall are the most comfortable seasons. Summers are hot and humid, and winter can bring snow and ice. Fares are usually highest in the busy periods described for each city, so flexible dates can help.
Which airlines should I compare for Chicago to St. Louis?
Airlines with a major base at either end include United Airlines, American Airlines and Southwest Airlines. A specialist compares them with other carriers on your dates, since schedules and availability change.
Do you show fares on this page?
No. Fares change constantly, so we do not publish prices that might be out of date. A specialist checks live availability and confirms the full total, including taxes and bags, before you pay.
Route details updated October 18, 2026.