Cheap flights from Chicago to St Louis

One-way fares from $61 · CHI → STL · prices found by travellers in the last 48 hours

Compare all dates St Louis → Chicago
Cheapest fare
$61

Southwest Airlines · Thu, Jan 14

Cheapest month
January

from $61

Direct flights
Yes

American Airlines and Southwest Airlines

Flight time
1h 10m

420 km

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Cheapest month to fly from Chicago to St Louis

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $100
  2. January 2027 Cheapest $61
  3. April 2027 $217

Cheapest dates in January 2027

The lowest fares we've seen for each day, cheapest first.

Southwest Airlines
Depart10:00 Thu, Jan 14MDW → STL 1h 15m · Direct
$61one way, per person
View deal
See every date in January 2027 →

Plan the rest of your trip to St Louis

Where to stay, what to do and getting around, from our travel partners.

Where to stay

Hotels in St LouisCompare places to stay on Booking.com Find hotels →

Things to do

Things to do in St LouisTours, attractions and day trips on Klook Explore →

Getting around

Airport transfer in St LouisPre-book a driver to meet you at arrivals, with Kiwitaxi Book a transfer → Car hire in St LouisCompare rental cars from major brands on EconomyBookings Compare cars →

About flights from Chicago to St Louis

Chicago (CHI) and St Louis (STL) are about 420 km apart. Direct flights take around 1h 10m, and recent direct fares were with American Airlines and Southwest Airlines. Over the next few months, one-way fares start from $61, and January 2027 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Chicago to St Louis?

The cheapest one-way fare we've seen recently is $61 with Southwest Airlines, departing Thursday, January 14, 2027. Over the coming months, the lowest fare in each month ranges from $61 to $217.

What is the cheapest month to fly from Chicago to St Louis?

January 2027 currently has the lowest fares, from $61 one way.

Are there direct flights from Chicago to St Louis?

Yes. Recent direct fares were with American Airlines and Southwest Airlines.

How long is the flight from Chicago to St Louis?

A direct flight takes about 1h 10m. Chicago and St Louis are around 420 km apart.

Which airlines fly from Chicago to St Louis?

Recent fares on this route were with American Airlines and Southwest Airlines.

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