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St. Louis

$84+ 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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — STL
dic. 23 — dic. 301
lun. 12/23
lun. 12/30
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 diciembre 18, 2024.

Round-trip from

$97
(Flightnetwork)

One-way from

$84
(Southwest)
From Illinois to Lambert-St Louis
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One-way flight from Illinois to Lambert-St Louis
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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 diciembre 18, 2024.

This oojo deal was found by Cheapflights users on 12/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/318:20 pmORD - STL
1 stop15h 25mSouthern / Mokulele
mar. 1/712:15 pmSTL - ORD
1 stop3h 35mSouthern / Mokulele
Deal found 12/18$165
This Delta deal was found by Cheapflights users on 12/18. 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.
mar. 12/315:50 pmORD - STL
1 stop4h 16mDelta
mar. 1/76:00 amSTL - ORD
2 stops6h 55mDelta
Deal found 12/18$226
This Southwest deal was found by Cheapflights users on 12/18. 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.
mié. 12/257:15 amMDW - STL
Nonstop1h 20mSouthwest
mié. 12/2510:40 amSTL - MDW
Nonstop1h 10mSouthwest
Deal found 12/18$243
This Mytrip deal was found by Cheapflights users on 12/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/2412:30 pmORD - STL
1 stop20h 20mMultiple Airlines
mar. 1/74:27 pmSTL - ORD
3 stops26h 52mMultiple Airlines
Deal found 12/18$280
This Southwest deal was found by Cheapflights users on 12/17. 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.
mar. 12/243:10 pmORD - STL
1 stop5h 35mSouthwest
mié. 12/2511:05 amSTL - ORD
2 stops7h 05mSouthwest
Deal found 12/17$301
This American Airlines deal was found by Cheapflights users on 12/17. 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.
mar. 12/318:42 pmORD - STL
Nonstop1h 37mAmerican Airlines
jue. 1/26:23 pmSTL - ORD
Nonstop1h 27mAmerican Airlines
Deal found 12/17$304
This United Airlines deal was found by Cheapflights users on 12/17. 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.
mié. 12/254:20 pmORD - STL
Nonstop1h 31mUnited Airlines
dom. 12/296:25 amSTL - ORD
Nonstop1h 35mUnited Airlines
Deal found 12/17$429
This Delta deal was found by Cheapflights users on 12/16. 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.
sáb. 12/285:04 pmMDW - STL
1 stop5h 02mDelta
mié. 1/16:04 amSTL - MDW
1 stop5h 04mDelta
Deal found 12/16$448
This Frontier deal was found by Cheapflights users on 12/17. 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.
jue. 12/198:00 amMDW - STL
1 stop11h 20mFrontier
lun. 12/237:43 amSTL - MDW
1 stop10h 11mFrontier
Deal found 12/17$528

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 2,558,603 searches. Data last updated diciembre 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

vie. 1/31

8:20 pm-11:45 am

1 stop15h 25m

Lambert-St Louis

vie. 2/7

12:15 pm-7:40 am

1 stop19h 25m

$97

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

vie. 2/21

12:33 pm-11:43 pm

1 stop11h 10m

Lambert-St Louis

lun. 2/24

5:20 pm-3:12 pm

1 stop21h 52m

$128

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

mié. 1/22

6:25 pm-8:02 pm

Nonstop1h 37m

Lambert-St Louis

mié. 1/29

11:30 am-1:04 pm

Nonstop1h 34m

$137

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

jue. 1/16

12:35 pm-1:45 pm

Nonstop1h 10m

Lambert-St Louis

jue. 1/16

5:00 pm-6:10 pm

Nonstop1h 10m

$163

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

jue. 1/16

3:00 pm-4:20 pm

Nonstop1h 20m

Lambert-St Louis

jue. 1/23

5:40 am-7:08 am

Nonstop1h 28m

$167

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

mié. 1/15

5:07 pm-11:37 pm

1 stop6h 30m

Lambert-St Louis

mié. 1/22

7:15 am-11:59 am

1 stop4h 44m

$176

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

lun. 1/13

4:58 pm-11:14 pm

2 stops6h 16m

Lambert-St Louis

mié. 1/15

2:00 pm-6:49 pm

1 stop4h 49m

$184

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

sáb. 2/1

8:45 pm-10:26 pm

Nonstop1h 41m

Lambert-St Louis

sáb. 2/8

1:00 pm-7:37 am

1 stop18h 37m

$208

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

vie. 1/31

8:20 pm-11:45 am

1 stop15h 25m

Lambert-St Louis

vie. 2/7

7:09 pm-9:52 pm

2 stops26h 43m

$231

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

jue. 1/9

6:15 am-4:55 pm

2 stops10h 40m

Lambert-St Louis

lun. 1/13

1:15 pm-9:30 pm

1 stop8h 15m

$251

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 22 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, August is the cheapest month in which you can book a flight from Illinois to St. Louis (average of $311). Flying from Illinois to St. Louis in March is currently the most expensive (average of $356). 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 diciembre 18, 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.

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 diciembre 18, 2024.
Get a feel of what it's like to fly with Southwest, Southern / Mokulele and American Airlines 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
4,848 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,848 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,552 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,604 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,059 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,848 reviews

Food

7.2

Entertainment

7.7

Crew

8.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 Southwest, with whom users have recently found tickets for as low as $84. However, be on the lookout for offers from United Airlines and Frontier, 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: Republic Airways (92%), Alaska Airlines (91%), Envoy Air (90%).

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

    Looking at all options, your cheapest flight can be booked for $111. While the most popular route (Chicago O'Hare Intl - Lambert-St Louis) can be booked for $101 on average our data indicates $330 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, August is the cheapest month in which you can book a flight from Illinois to St. Louis (average of $311). Flying from Illinois to St. Louis in March is currently the most expensive (average of $356). 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 2,558,603 searches. Data last updated diciembre 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$115Average$279FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$126Average$307FlexibilityNo cancel feeOn-time69%
Southern / MokuleleCheapest$143Average$179FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$181Average$328FlexibilityNo cancel feeOn-time63%
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