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St. Louis

$54+ Cheap flights from Illinois to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — STL
Nov 18 — Nov 251
Mon 11/18
Mon 11/25
1 adult, Economy
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Cheap flight deals from Illinois to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 13, 2024.

Find flight deals from Illinois to St. Louis

Cheapest flights from Illinois to St. Louis
Explore the most affordable flight options available from Illinois to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2024.

This Gotogate deal was found by Cheapflights users on 11/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/58:25 amORD - STL
1 stop11h 30mSouthern / Mokulele
Mon 12/95:00 pmSTL - ORD
1 stop14h 40mSouthern / Mokulele
Deal found 11/13$101
This flugladen.de deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/157:25 amORD - STL
1 stop24h 48mMultiple Airlines
Tue 12/1712:15 pmSTL - ORD
1 stop3h 35mMultiple Airlines
Deal found 11/11$121
This Southwest deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/187:15 amMDW - STL
Nonstop1h 20mSouthwest
Wed 12/1810:40 amSTL - MDW
Nonstop1h 10mSouthwest
Deal found 11/11$133
This American Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/118:20 amORD - STL
Nonstop1h 26mAmerican Airlines
Wed 12/185:45 amSTL - ORD
Nonstop1h 27mAmerican Airlines
Deal found 11/12$137
This United Airlines deal was found by Cheapflights users on 11/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1610:50 amORD - STL
Nonstop1h 29mUnited Airlines
Wed 12/188:05 amSTL - ORD
Nonstop1h 29mUnited Airlines
Deal found 11/13$152
This Delta deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/245:51 pmMDW - STL
1 stop3h 52mDelta
Tue 12/3110:13 amSTL - MDW
1 stop5h 57mDelta
Deal found 11/12$176
This Delta deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/111:45 pmORD - STL
2 stops8h 41mDelta
Wed 12/1810:21 amSTL - ORD
1 stop4h 17mDelta
Deal found 11/12$181
This Frontier deal was found by Cheapflights users on 11/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1912:58 pmMDW - STL
1 stop10h 30mFrontier
Fri 12/209:47 amSTL - MDW
1 stop8h 07mFrontier
Deal found 11/13$208
This Frontier deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/129:35 amORD - STL
1 stop13h 49mFrontier
Mon 12/166:46 pmSTL - ORD
1 stop18h 03mFrontier
Deal found 11/12$228
This Southwest deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/215:45 amORD - STL
2 stops6h 55mSouthwest
Fri 11/227:45 amSTL - ORD
1 stop6h 40mSouthwest
Deal found 11/12$301
This FareScan deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FareScan is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1810:13 pmORD - STL
2 stops18h 21mSpirit Airlines
Thu 11/215:21 pmSTL - ORD
2 stops22h 49mSpirit Airlines
Deal found 11/12$310
This American Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/212:52 pmSPI - STL
1 stop7h 18mAmerican Airlines
Thu 11/287:30 amSTL - SPI
1 stop34h 29mAmerican Airlines
Deal found 11/12$485

Find flights from Illinois to St. Louis within your budget

Customize your flight search to find flights from Illinois to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,744,491 searches. Data last updated November 13, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 12/5

9:25 pm-4:45 pm

1 stop19h 20m

Lambert-St Louis

Mon 12/9

2:00 pm-4:10 pm

1 stop26h 10m

$101

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sun 12/15

7:25 am-8:13 am

1 stop24h 48m

Lambert-St Louis

Tue 12/17

12:15 pm-3:50 pm

1 stop3h 35m

$121

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Wed 12/18

9:50 am-11:05 am

Nonstop1h 15m

Lambert-St Louis

Wed 12/18

1:35 pm-2:40 pm

Nonstop1h 05m

$133

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 12/11

8:20 am-9:46 am

Nonstop1h 26m

Lambert-St Louis

Wed 12/18

5:45 am-7:12 am

Nonstop1h 27m

$137

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Mon 12/16

10:50 am-12:19 pm

Nonstop1h 29m

Lambert-St Louis

Wed 12/18

8:05 am-9:34 am

Nonstop1h 29m

$152

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Tue 12/24

5:51 pm-9:43 pm

1 stop3h 52m

Lambert-St Louis

Tue 12/31

10:13 am-4:10 pm

1 stop5h 57m

$176

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 12/11

1:45 pm-10:26 pm

2 stops8h 41m

Lambert-St Louis

Wed 12/18

10:21 am-2:38 pm

1 stop4h 17m

$181

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 12/19

12:58 pm-11:28 pm

1 stop10h 30m

Lambert-St Louis

Fri 12/20

9:47 am-5:54 pm

1 stop8h 07m

$208

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 12/12

9:35 am-11:24 pm

1 stop13h 49m

Lambert-St Louis

Mon 12/16

6:46 pm-12:49 pm

1 stop18h 03m

$228

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 12/13

5:45 am-12:40 pm

2 stops6h 55m

Lambert-St Louis

Mon 12/16

11:05 am-6:10 pm

2 stops7h 05m

$291

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/13

Showing 1-10 of 24 results
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Best time to book a flight from Illinois to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Illinois to St. Louis

Get recent, data-driven insights about flights from Illinois to St. Louis including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Illinois to St. Louis?

Currently, September is the cheapest month in which you can book a flight from Illinois to St. Louis (average of $308). Flying from Illinois to St. Louis in March is currently the most expensive (average of $357). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to STL?

Find hourly flight availability from Illinois to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 13, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to St. Louis as you normally would.

Weekly flight availability from Illinois to St. Louis

Explore weekly flight availability from Illinois to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 13, 2024.

The most flights from USIL to STL are scheduled on a Monday (55 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (31 on average).

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated November 13, 2024.
Get a feel of what it's like to fly with Southwest, Frontier and Southern / Mokulele from Illinois to St. Louis by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,048 reviews

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.3

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,048 reviews
Southwest
8.1
Very good
5,048 reviews

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.3

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,789 reviews
Southwest
8.1
Very good
5,048 reviews

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.3

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,189 reviews
Southwest
8.1
Very good
5,048 reviews

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.3

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
5,048 reviews

Overall

8.1

Comfort

8.1

Crew

8.7

Boarding

8.3

Food

7.2

Entertainment

7.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Related info for your journey

Find useful and relevant information for your journey from Illinois to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Illinois?

    If you book a flight to St. Louis from Illinois, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.

  • What are the cheapest airlines to fly from Illinois to St. Louis one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $54. However, be on the lookout for offers from Southern / Mokulele and Southwest, as they are both options that can get you from Illinois to St. Louis for a low price.

  • What are the most popular routes from Illinois to St. Louis?

    When deciding which route to take from Illinois to St. Louis consider Chicago O'Hare Intl - Lambert-St Louis, Chicago Midway - Lambert-St Louis or Springfield Capital - Lambert-St Louis as they are the most popular.

  • What are the most reliable airlines from Illinois to St. Louis?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Illinois to St. Louis on time: Avianca (100%), Republic Airways (100%), United Airlines (93%).

  • What are the cheapest flights from Illinois to St. Louis?

    Looking at all options, your cheapest flight can be booked for $87. While the most popular route (Chicago O'Hare Intl - Lambert-St Louis) can be booked for $109 on average our data indicates $253 when flying from Illinois to St. Louis.

  • Can I find deals for flights from Illinois to St. Louis that include hotel bookings?

    Yes. In addition to deals on Illinois to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to St. Louis.

  • Can I find deals for business class flights from Illinois to St. Louis?

    Yes. Cheapflights offers flight deals from Illinois to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to St. Louis?

    Currently, September is the cheapest month in which you can book a flight from Illinois to St. Louis (average of $308). Flying from Illinois to St. Louis in March is currently the most expensive (average of $357). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Illinois to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Illinois to St. Louis

Discover the top 4 airlines that operate flights from Illinois to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,744,491 searches. Data last updated November 13, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$115Average$269FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$129Average$301FlexibilityNo cancel feeOn-time69%
Southern / MokuleleCheapest$143Average$179FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$181Average$376FlexibilityNo cancel feeOn-time63%
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