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Find cheap one-way flights from Chicago to St. Louis starting at HK$464.

For as little as HK$464, you can take your next adventure to St. Louis without breaking the bank. Choose between one-way and return tickets from Chicago below.

  • One way
  • Round-trip
      • Cheapest nonstop
        ORD10:00
        1h 32m
        Nonstop
        STL11:32
        Tue, Dec 31|Chicago - St. Louis|American Airlines
        HK$539HK$621
        13% OFF
        13% OFF
        HK$621HK$539

        Choose American Airlines flights from Chicago to St. Louis.The one-way direct flight with American Airlines departs from O'Hare International Airport on Tue, Dec 31, arriving at St. Louis Lambert International Airport.One-way Prices start from HK$539 including taxes and charges.

      • MDW09:05
        1h 15m
        Nonstop
        STL10:20
        Tue, Jan 7|Chicago - St. Louis|Southwest Airlines
        HK$539HK$621
        13% OFF
        13% OFF
        HK$621HK$539

        Choose Southwest Airlines flights from Chicago to St. Louis.The one-way direct flight with Southwest Airlines departs from Midway International Airport on Tue, Jan 7, arriving at St. Louis Lambert International Airport.One-way Prices start from HK$539 including taxes and charges.

      • ORD12:40
        1h 27m
        Nonstop
        STL14:07
        Tue, Jan 21|Chicago - St. Louis|American Airlines
        HK$540HK$621
        13% OFF
        13% OFF
        HK$621HK$540

        Choose American Airlines flights from Chicago to St. Louis.The one-way direct flight with American Airlines departs from O'Hare International Airport on Tue, Jan 21, arriving at St. Louis Lambert International Airport.One-way Prices start from HK$540 including taxes and charges.

      • MDW07:15
        26h 1m
        1 stop
        STL09:16
        Thu, Jan 23|Chicago - St. Louis|Frontier Airlines
        HK$464
        HK$464

        Choose Frontier Airlines flights from Chicago to St. Louis.The one-way connecting flight with Frontier Airlines departs from Midway International Airport on Thu, Jan 23, arriving at St. Louis Lambert International Airport.One-way Prices start from HK$464 including taxes and charges.

      • MDW07:15
        26h 1m
        1 stop
        STL09:16
        Thu, Jan 16|Chicago - St. Louis|Frontier Airlines
        HK$465
        HK$465

        Choose Frontier Airlines flights from Chicago to St. Louis.The one-way connecting flight with Frontier Airlines departs from Midway International Airport on Thu, Jan 16, arriving at St. Louis Lambert International Airport.One-way Prices start from HK$465 including taxes and charges.

      • MDW08:15
        24h 51m
        1 stop
        STL09:06
        Tue, Jan 14|Chicago - St. Louis|Frontier Airlines
        HK$472
        HK$472

        Choose Frontier Airlines flights from Chicago to St. Louis.The one-way connecting flight with Frontier Airlines departs from Midway International Airport on Tue, Jan 14, arriving at St. Louis Lambert International Airport.One-way Prices start from HK$472 including taxes and charges.

      • MDW08:15
        25h 1m
        1 stop
        STL09:16
        Tue, Jan 21|Chicago - St. Louis|Frontier Airlines
        HK$481
        HK$481

        Choose Frontier Airlines flights from Chicago to St. Louis.The one-way connecting flight with Frontier Airlines departs from Midway International Airport on Tue, Jan 21, arriving at St. Louis Lambert International Airport.One-way Prices start from HK$481 including taxes and charges.

      • MDW07:15
        26h 1m
        1 stop
        STL09:16
        Thu, Feb 6|Chicago - St. Louis|Frontier Airlines
        HK$485
        HK$485

        Choose Frontier Airlines flights from Chicago to St. Louis.The one-way connecting flight with Frontier Airlines departs from Midway International Airport on Thu, Feb 6, arriving at St. Louis Lambert International Airport.One-way Prices start from HK$485 including taxes and charges.

      • ORD07:25
        25h 41m
        1 stop
        STL09:06
        Thu, Jan 9|Chicago - St. Louis|Frontier Airlines
        HK$490
        HK$490

        Choose Frontier Airlines flights from Chicago to St. Louis.The one-way connecting flight with Frontier Airlines departs from O'Hare International Airport on Thu, Jan 9, arriving at St. Louis Lambert International Airport.One-way Prices start from HK$490 including taxes and charges.

      • MDW06:40
        26h 36m
        1 stop
        STL09:16
        Fri, Feb 21|Chicago - St. Louis|Frontier Airlines
        HK$535
        HK$535

        Choose Frontier Airlines flights from Chicago to St. Louis.The one-way connecting flight with Frontier Airlines departs from Midway International Airport on Fri, Feb 21, arriving at St. Louis Lambert International Airport.One-way Prices start from HK$535 including taxes and charges.

      • CHI01:00 pm
        3h 5m
        Nonstop
        STL02:00 pm
        Sat, Dec 28|Chicago - St. Louis|American Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to book flights from Chicago to St. Louis?

Price trend charts are a great way of tracking how much your flights cost in the lead up to departure and can help you choose when to book your tickets. See how prices to St. Louis from Chicago have changed and are set to move below.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Cheapest airlines flights from Chicago to St. Louis

Compare prices from various providers below to understand which option best suits your travel needs, before enjoying a comfortable journey with a trusted airline from Chicago to St. Louis.

Frontier Airlines
From HK$464
Southwest Airlines
From HK$539
American Airlines
From HK$539
Southern Airways Express
From HK$602
Delta Air Lines
From HK$617
United Airlines
From HK$638
Alaska Airlines
From HK$2,000

Find more flights and airlines

Find cheap flights from Chicago to St. Louis by different airports

Did you know that you can save money and time on an alternative route from Chicago to St. Louis? Check out some of the different available routes below.

  • Cheapest
    Frontier Airlines
    MDW
    07:15
    26h 1m
    1 transfer
    STL
    09:16
    Midway International Airport - St. Louis Lambert International Airport
    Thu, Jan 23Frontier Airlines
    HK$464
  • Frontier Airlines
    ORD
    07:25
    25h 41m
    1 transfer
    STL
    09:06
    O'Hare International Airport - St. Louis Lambert International Airport
    Thu, Jan 9Frontier Airlines
    HK$490
  • Frontier Airlines
    ORD
    07:25
    25h 41m
    1 transfer
    STL
    09:06
    O'Hare International Airport - St. Louis Lambert International Airport
    Thu, Jan 9Frontier Airlines
    HK$490
    Find More Flights

Frequently Asked Questions

  • When are flight tickets from Chicago (CHI) to St. Louis (STL) the cheapest?

    Airlines adjust prices for flights from Chicago to St. Louis based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Chicago (CHI) to St. Louis (STL) cost?

    According to Trip.com's data, the lowest price is around HK$1,648.

  • How long does it take to fly from Chicago (CHI) to St. Louis (STL) and what is the distance?

    It takes around 1 hour 57 minutes to fly from Chicago (CHI) to St. Louis (STL).

  • What is the transportation method from the main airport to downtown in St. Louis?

    • The distance from St. Louis Lambert International Airport to downtown is about 20 km. It takes about 40 minutes by taxi.

  • What are the most popular airlines that fly from Chicago (CHI) to St. Louis (STL)?

    Airlines with flights from Chicago (CHI) to St. Louis (STL): American Airlines, Southwest Airlines, Royal Jordanian, United Airlines, Iberia, Qatar Airways and All Nippon Airways.

How to find a cheap flight from Chicago to St. Louis

If you don’t know some of the key things to look out for when buying flight tickets, prices can often end up sky high or, worse, sold out! We’ve carefully compiled our six most important steps to help ensure you’re getting the best deals when planning your next journey.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Chicago to St. Louis Flight Information

Cheapest nonstop flight priceHK$464
Cheapest round-trip ticket priceHK$949
Off-season for travelNovember
Peak season for travelSeptember
Flight distance421.66 km
Average flight time1 hour 57 minutes
Popular airlineSouthern Airways Express

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