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Cheap flights from Illinois to St. Louis (STL) from $46

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 5/26. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ORD — STL
Apr 24 — May 11
From?
To?
Wed 4/24
Wed 5/1
1 adult, Economy
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How far in advance should I book a flight from Illinois to St. Louis?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 39 days in advance, which can save you up to 75% on flights from Illinois to St. Louis compared to booking the week you need them. Waiting 39 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $208. For sooner than that we have options available in the next 3 days from $224.

What is the cheapest month to fly from Illinois to St. Louis?

Our data shows that September tends to be the cheapest month to fly to St. Louis from Illinois. Users have commonly found prices around $270 for the month, but tickets can be as low as $128. Due to multiple factors, prepare for potentially higher prices in March.

When is the cheapest time to fly from Illinois to St. Louis (IL - STL)?

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.

Cheap Delta flights from Illinois to St. Louis

Explore cheap flight options specifically provided by Delta for the route between Illinois and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,138,949 searches. Data last updated April 19, 2024.
Take a look at some of the lowest-priced Delta flights heading from Illinois to St. Louis. It's recommended that users confirm their flight details before booking.
Sat 5/255:00 pmMDW - STL
1 stop4h 52mDelta
Sun 5/266:11 amSTL - MDW
1 stop4h 51mDelta
Deal found 4/18$136
Sat 5/1111:01 amMDW - STL
1 stop4h 56mDelta
Tue 5/1412:00 pmSTL - MDW
1 stop5h 06mDelta
Deal found 4/19$167
Tue 5/1411:45 amORD - STL
2 stops10h 07mDelta
Tue 5/212:18 pmSTL - ORD
1 stop6h 37mDelta
Deal found 4/19$172
Fri 5/316:48 pmMDW - STL
1 stop4h 52mDelta
Sun 6/26:30 amSTL - MDW
1 stop6h 10mDelta
Deal found 4/18$200
Sun 4/2812:45 pmMDW - STL
1 stop5h 23mDelta
Wed 5/17:15 amSTL - MDW
2 stops10h 05mDelta
Deal found 4/18$436
Wed 4/2411:20 amMDW - STL
1 stop5h 30mDelta
Sat 4/276:00 amSTL - MDW
1 stop4h 10mDelta
Deal found 4/19$450
Mon 4/295:05 pmMDW - STL
1 stop4h 12mDelta
Tue 4/3010:01 amSTL - MDW
1 stop6h 09mDelta
Deal found 4/19$464
Sat 4/2711:45 amORD - STL
2 stops9h 32mDelta
Mon 4/292:27 pmSTL - ORD
1 stop4h 51mDelta
Deal found 4/19$469
Sat 4/2711:45 amORD - STL
2 stops9h 32mDelta
Mon 4/296:13 amSTL - ORD
2 stops6h 30mDelta
Deal found 4/18$474

Cheap Frontier flights from Illinois to St. Louis

Explore cheap flight options specifically provided by Frontier for the route between Illinois and St. Louis. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,138,949 searches. Data last updated April 19, 2024.
Some of the best deals we've found on Frontier flights traveling from Illinois to St. Louis. Ensure the flight price, dates, time, and airline match your criteria before you book.
Tue 5/1410:59 pmMDW - STL
1 stop11h 19mFrontier
Tue 5/217:44 pmSTL - MDW
1 stop11h 10mFrontier
Deal found 4/18$95
Sat 5/1110:59 pmMDW - STL
1 stop11h 19mFrontier
Wed 5/155:56 pmSTL - MDW
1 stop12h 58mFrontier
Deal found 4/17$98
Sun 5/198:55 pmMDW - STL
1 stop13h 18mFrontier
Wed 5/228:47 amSTL - MDW
1 stop5h 22mFrontier
Deal found 4/18$108
Fri 5/310:59 pmMDW - STL
1 stop11h 19mFrontier
Sat 5/48:04 pmSTL - MDW
1 stop12h 27mFrontier
Deal found 4/18$117
Sun 5/195:01 amMDW - STL
1 stop17h 31mFrontier
Sat 5/257:23 pmSTL - MDW
1 stop10h 27mFrontier
Deal found 4/17$187
Thu 4/2510:53 pmMDW - STL
1 stop10h 54mFrontier
Sun 4/283:29 pmSTL - MDW
1 stop6h 08mFrontier
Deal found 4/18$778

Cheap Illinois to St. Louis flights in April & May 2024

Find cheap flight options from Illinois to St. Louis specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,138,949 searches. Prices were last updated on April 19, 2024.
Check out some of the best flight deals from Illinois to St. Louis in 2024. More deals are always being added, so be sure to check back regularly.
Fri 5/310:59 pmMDW - STL
1 stop11h 19mFrontier
Sat 5/48:04 pmSTL - MDW
1 stop12h 27mFrontier
Deal found 4/18$117
Thu 5/93:04 pmORD - STL
Nonstop1h 13mAmerican Airlines
Fri 5/105:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Deal found 4/17$117
Mon 5/207:59 pmORD - STL
1 stop14h 14mMultiple Airlines
Wed 5/2212:15 pmSTL - ORD
1 stop3h 35mMultiple Airlines
Deal found 4/18$120
Fri 5/39:25 pmORD - STL
1 stop14h 05mMultiple Airlines
Sat 5/43:36 pmSTL - ORD
1 stop8h 07mMultiple Airlines
Deal found 4/18$122
Tue 5/148:30 amORD - STL
1 stop4h 40mAmerican Airlines
Tue 5/215:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Deal found 4/19$130
Wed 5/159:25 pmORD - STL
1 stop14h 05mSouthern / Mokulele
Sun 5/1912:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Deal found 4/18$131
Fri 4/268:15 amORD - STL
1 stop8h 30mSouthern / Mokulele
Sun 4/2812:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Deal found 4/18$132
Fri 5/175:56 pmORD - STL
1 stop22h 29mMultiple Airlines
Sun 5/1912:00 pmSTL - ORD
1 stop4h 10mMultiple Airlines
Deal found 4/18$134
Fri 5/39:25 pmORD - STL
1 stop14h 05mMultiple Airlines
Sat 5/43:36 pmSTL - ORD
1 stop8h 07mMultiple Airlines
Deal found 4/19$135

Illinois to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Illinois and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,138,949 searches. Data last updated April 19, 2024.
Check out some of the best flight deals from Illinois to St. Louis in 2024. More deals are always being added, so be sure to check back regularly.
Fri 5/310:59 pmMDW - STL
1 stop11h 19mFrontier
Sat 5/48:04 pmSTL - MDW
1 stop12h 27mFrontier
Deal found 4/18$117
Thu 5/93:04 pmORD - STL
Nonstop1h 13mAmerican Airlines
Fri 5/105:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Deal found 4/17$117
Mon 5/207:59 pmORD - STL
1 stop14h 14mMultiple Airlines
Wed 5/2212:15 pmSTL - ORD
1 stop3h 35mMultiple Airlines
Deal found 4/18$120
Fri 5/39:25 pmORD - STL
1 stop14h 05mMultiple Airlines
Sat 5/43:36 pmSTL - ORD
1 stop8h 07mMultiple Airlines
Deal found 4/18$122
Tue 5/148:30 amORD - STL
1 stop4h 40mAmerican Airlines
Tue 5/215:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Deal found 4/19$130
Wed 5/159:25 pmORD - STL
1 stop14h 05mSouthern / Mokulele
Sun 5/1912:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Deal found 4/18$131
Fri 4/268:15 amORD - STL
1 stop8h 30mSouthern / Mokulele
Sun 4/2812:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Deal found 4/18$132
Fri 5/175:56 pmORD - STL
1 stop22h 29mMultiple Airlines
Sun 5/1912:00 pmSTL - ORD
1 stop4h 10mMultiple Airlines
Deal found 4/18$134
Fri 5/39:25 pmORD - STL
1 stop14h 05mMultiple Airlines
Sat 5/43:36 pmSTL - ORD
1 stop8h 07mMultiple Airlines
Deal found 4/19$135

Non-stop flights to St. Louis from Illinois

Discover non-stop flight options from Illinois to St. Louis. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 3,138,949 searches. Data last updated April 19, 2024.
If you're seeking options on non-stop flights from Illinois to St. Louis, check out these fares. Those looking to potentially save on 1 or 2-stop flights from Illinois to St. Louis should utilize the search form at the the top of the page.
Thu 5/93:04 pmORD - STL
Nonstop1h 13mAmerican Airlines
Fri 5/105:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Deal found 4/17$117
Thu 5/233:04 pmORD - STL
Nonstop1h 13mAmerican Airlines
Sun 5/265:08 pmSTL - ORD
Nonstop1h 17mAmerican Airlines
Deal found 4/18$168
Wed 5/159:50 amORD - STL
Nonstop1h 20mAmerican Airlines
Fri 5/175:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Deal found 4/18$171
Fri 5/173:04 pmORD - STL
Nonstop1h 13mAmerican Airlines
Fri 5/245:08 pmSTL - ORD
Nonstop1h 17mAmerican Airlines
Deal found 4/19$181
Fri 5/102:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Mon 5/1311:10 amSTL - ORD
Nonstop1h 21mUnited Airlines
Deal found 4/19$192
Sat 5/112:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Wed 5/1510:10 amSTL - ORD
Nonstop1h 31mUnited Airlines
Deal found 4/17$217
Tue 6/2511:59 amORD - STL
Nonstop1h 13mAmerican Airlines
Wed 6/266:00 amSTL - ORD
Nonstop1h 22mAmerican Airlines
Deal found 4/18$225
Fri 5/103:04 pmORD - STL
Nonstop1h 13mAmerican Airlines
Fri 5/175:08 pmSTL - ORD
Nonstop1h 17mAmerican Airlines
Deal found 4/18$245
Sat 5/188:50 amORD - STL
Nonstop1h 27mUnited Airlines
Sat 5/185:25 pmSTL - ORD
Nonstop1h 20mUnited Airlines
Deal found 4/18$305

Illinois to St. Louis flights leaving soon

Find last-minute flight options from Illinois to St. Louis for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,138,949 searches. Data last updated April 19, 2024.
Users seeking a last-minute flight from Illinois to St. Louis should consider booking one of these fares. To prevent any unwanted surprises, users should verify their flight info before booking.
Fri 4/268:15 amORD - STL
1 stop8h 30mSouthern / Mokulele
Sun 4/2812:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Deal found 4/18$132
Thu 4/259:25 pmORD - STL
1 stop14h 05mSouthern / Mokulele
Sun 4/2812:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Deal found 4/18$136
Fri 4/268:15 amORD - STL
1 stop8h 30mSouthern / Mokulele
Sat 4/2712:00 pmSTL - ORD
1 stop19h 40mSouthern / Mokulele
Deal found 4/18$145
Wed 4/245:15 pmORD - STL
1 stop13h 45mSouthern / Mokulele
Thu 4/2512:00 pmSTL - ORD
1 stop19h 40mSouthern / Mokulele
Deal found 4/18$152
Sun 4/289:25 pmORD - STL
1 stop14h 05mSouthern / Mokulele
Wed 5/18:55 pmSTL - ORD
1 stop22h 15mSouthern / Mokulele
Deal found 4/18$155
Wed 4/245:15 pmORD - STL
1 stop3h 05mSouthern / Mokulele
Sat 4/2712:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Deal found 4/19$157
Thu 4/255:15 pmORD - STL
1 stop3h 05mSouthern / Mokulele
Sun 4/288:55 pmSTL - ORD
1 stop19h 45mSouthern / Mokulele
Deal found 4/19$182
Sat 4/279:25 pmORD - STL
1 stop14h 05mSouthern / Mokulele
Mon 4/293:55 pmSTL - ORD
1 stop24h 45mSouthern / Mokulele
Deal found 4/18$196
Fri 4/268:15 amORD - STL
1 stop8h 30mMultiple Airlines
Sun 4/287:30 pmSTL - ORD
2 stops25h 35mMultiple Airlines
Deal found 4/18$231

One-way flights to St. Louis from Illinois

Search for one-way flight options from Illinois to St. Louis. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,138,949 searches. Data last updated April 19, 2024.
Some of the best available deals we've found on one-way flights from Illinois to St. Louis. Users in need of a round-trip flight from Illinois to St. Louis instead should update the search form at the top of page.
Sun 5/268:24 pmORD - STL
Nonstop1h 23mAmerican Airlines
Deal found 4/18$46
Wed 5/158:25 amORD - STL
1 stop8h 30mFrontier
Deal found 4/18$49
Sat 5/189:08 pmMDW - STL
1 stop10h 00mFrontier
Deal found 4/18$55
Sat 5/187:59 pmORD - STL
1 stop14h 14mFrontier
Deal found 4/18$55
Thu 5/163:04 pmORD - STL
Nonstop1h 13mAmerican Airlines
Deal found 4/18$59
Mon 5/209:10 pmMDW - STL
1 stop13h 03mFrontier
Deal found 4/18$60
Thu 5/165:56 pmORD - STL
1 stop13h 12mFrontier
Deal found 4/18$60
Fri 5/39:16 pmMDW - STL
1 stop14h 23mFrontier
Deal found 4/18$65
Sun 5/197:59 pmORD - STL
1 stop14h 14mFrontier
Deal found 4/18$65

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 3,138,949 searches. Data last updated April 19, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$94 - $223

Route

Depart

Return

Price

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sun 5/26

Nonstop1h 23m

Lambert-St Louis

Wed 5/29

Nonstop1h 19m

$94

Chicago MidwayLambert-St Louis

MDW - STL

MDWSTL

Chicago Midway

Tue 5/14

1 stop11h 19m

Lambert-St Louis

Tue 5/21

1 stop11h 10m

$95

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 5/14

Nonstop1h 13m

Lambert-St Louis

Tue 5/21

Nonstop1h 16m

$97

Chicago MidwayLambert-St Louis

MDW - STL

MDWSTL

Chicago Midway

Sat 5/11

1 stop11h 19m

Lambert-St Louis

Wed 5/15

1 stop12h 58m

$98

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Mon 5/20

1 stop14h 14m

Lambert-St Louis

Wed 5/22

1 stop3h 35m

$120

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 5/15

1 stop14h 05m

Lambert-St Louis

Sun 5/19

1 stop4h 10m

$131

Chicago MidwayLambert-St Louis

MDW - STL

MDWSTL

Chicago Midway

Sat 5/25

1 stop4h 52m

Lambert-St Louis

Sun 5/26

1 stop4h 51m

$136

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 5/10

Nonstop1h 22m

Lambert-St Louis

Mon 5/13

Nonstop1h 21m

$192

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 5/11

2 stops22h 22m

Lambert-St Louis

Tue 5/14

2 stops19h 20m

$223

Flights are sorted by cheapest first

Deals found on 4/19

No data available for this route at this time. Please check back soon.

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 April 19, 2024.
Get a feel of what it's like to fly with Delta, Frontier 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
8.2
Very good
6,208 reviews
Check prices

Crew

8.7

Boarding

8.3

Entertainment

7.9

Overall

8.2

Comfort

8.1

Food

7.4

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

Southwest
8.2
Very good
6,208 reviews
Southwest
8.2
Very good
6,208 reviews
Check prices

Crew

8.7

Boarding

8.3

Entertainment

7.9

Overall

8.2

Comfort

8.1

Food

7.4

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

Delta
8.1
Very good
11,094 reviews
Southwest
8.2
Very good
6,208 reviews
Check prices

Crew

8.7

Boarding

8.3

Entertainment

7.9

Overall

8.2

Comfort

8.1

Food

7.4

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

WestJet
7.5
Good
3,004 reviews
Southwest
8.2
Very good
6,208 reviews
Check prices

Crew

8.7

Boarding

8.3

Entertainment

7.9

Overall

8.2

Comfort

8.1

Food

7.4

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

United Airlines
7.4
Good
11,325 reviews
Southwest
8.2
Very good
6,208 reviews
Check prices

Crew

8.7

Boarding

8.3

Entertainment

7.9

Overall

8.2

Comfort

8.1

Food

7.4

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

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.

  • Can I find flights from Illinois to St. Louis for under $100 on Cheapflights?

    Yes, there are multiple flights from Illinois to St. Louis for under $100. The cheapest flight booked recently is on American Airlines for just $94, but on average you can expect to pay $119.

  • Are there nonstop flights from Illinois to St. Louis for under $200 on Cheapflights?

    Cheapflights has at least 20 direct flights from Illinois to St. Louis under $200. A good price for a nonstop flight from Illinois to St. Louis is less than $303.

  • Are there last-minute flights available from Illinois to St. Louis for under $200?

    There are currently 20+ open flights from Illinois to St. Louis within the next 7 days for less than $200.

  • What days are nonstop flights available from Illinois to St. Louis?

    Nonstop flights are available for this route on the following days: Sunday, Tuesday, Saturday.

  • How many flights depart from Illinois to St. Louis on average per day?

    7 flight departures from Illinois to St. Louis per day on average.
    Morning (6am - Noon) - 100% of flight departures

  • How long is the flight from Illinois to St. Louis?

    Airlines like American Airlines, Frontier, and Southern / Mokulele fly from Illinois to St. Louis in about 1h 23m. The time it takes to get you to your destination can typically vary by up to 12h 42m. There are 259 mi between Illinois and St. Louis. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $46. However, be on the lookout for offers from Frontier and Delta, 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 popular airlines that fly from Illinois to St. Louis?

    The most popular airlines flying from Illinois to St. Louis are Southern / Mokulele, American Airlines and United Airlines. Something to consider prior to booking your flight.

  • 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: Air Wisconsin (100%), Austrian Airlines (98%), Emirates (93%).

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

    Looking at all options, your cheapest flight can be booked for $48. While the most popular route (Chicago O'Hare Intl - Lambert-St Louis) can be booked for $120 on average our data indicates $277 when flying from Illinois to St. Louis.

  • What does ORD to STL mean?

    This is defined as Chicago O'Hare Intl Airport (ORD) and Lambert-St Louis Airport (STL). Codes like Lambert-St Louis Airport are often used to just call airports uniquely. This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Champaign University-Willard Airport (CMI).

  • Can I find deals for flights from Illinois to St. Louis that include extra baggage allowance?

    The amount of baggage you can bring on your Illinois to St. Louis flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Illinois to St. Louis with specific airlines?

    Yes, Cheapflights allows you to browse and filter Illinois to St. Louis flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from Illinois to St. Louis that allow pets onboard?

    Many airlines flying from Illinois to St. Louis offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Illinois to St. Louis?

    Yes, you can often find last-minute deals on Illinois to St. Louis flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Illinois to St. Louis flight deals updated?

    The Illinois to St. Louis flight deals you see on this page were last updated on 4/19.

See more FAQs

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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 3 airlines flying from Illinois to St. Louis

Discover the top 3 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 3,138,949 searches. Data last updated April 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$107Average$270FlexibilityNo cancel feeOn-time71%
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United AirlinesCheapest$130Average$294FlexibilityNo cancel feeOn-time69%
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Southern / MokuleleCheapest$141Average$166FlexibilityNo cancel feeOn-timeN/A
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Search flights from Illinois to St. Louis by cabin class

Find flights from Illinois to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Illinois to St. Louis

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 April 19, 2024.
1%of flight departuresEarly morningMidnight to 6 am
24%of flight departuresMorning6 am to noon
55%of flight departuresAfternoonNoon to 6 pm
20%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Illinois to St. Louis?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Illinois to St. Louis. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Illinois to St. Louis?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Illinois to St. Louis.

Can Cheapflights find flights from Illinois to St. Louis with no change fees?

Need flexible booking options for your flight to St. Louis from Illinois? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Illinois to St. Louis become cheaper?

Yes, Cheapflights offers price alerts on Illinois to St. Louis flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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