Cheap flights from Chicago (CHI) to St. Louis (STL) from $49

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 4/16. 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.
CHI — STL
Mar 24 — Mar 311

The best prices from Chicago to Lambert-St Louis are usually found in September or January, booked 38 days in advance, depart on a Wednesday or Friday and return on a Thursday

Cheap flight deals from Chicago to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) 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 March 19, 2024.

Popular in

March

Cheapest in

September

Round-trip from

$323

One-way from

$77
High demand for flights, 21% potential price rise
Best time to find cheap flights, 17% potential price drop
From Chicago (CHI) to Lambert-St Louis
One-way flight from Chicago (CHI) to Lambert-St Louis

What is the cheapest day to fly round-trip from Chicago to St. Louis?

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 43% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from Chicago to St. Louis?

To save on the cost of your flight from Chicago to St. Louis, book at least 39 days before your planned departure. Booking around this time can save you about 75% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $208 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $224.

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

September is one of the best times of the year to fly to St. Louis from Chicago. Prices for September average $270 per person but you can even find prices for as low as $128. The most expensive prices can be found in the month of March. Opting for a September flight can save you 26% on your journey compared to booking in March

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

Unlike in the evening, when flights are generally more expensive, you can save up to 32% on flights from Chicago to St. Louis by exploring options for tickets in the afternoon.

Cheap United Airlines flights from Chicago to St. Louis

Explore cheap flight options specifically provided by United Airlines for the route between Chicago 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 3,145,932 searches. Data last updated March 19, 2024.
Consider these cheap United Airlines flights we've found departing from Chicago to St. Louis. It's recommended that users confirm their flight details before booking.
Tue 4/232:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Tue 4/235:25 pmSTL - ORD
Nonstop1h 20mUnited Airlines
Deal found 3/18$93
Sat 4/202:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Tue 4/235:25 pmSTL - ORD
Nonstop1h 20mUnited Airlines
Deal found 3/18$99
Fri 4/192:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Sun 4/2111:10 amSTL - ORD
Nonstop1h 21mUnited Airlines
Deal found 3/17$128
Thu 4/112:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Sun 4/1410:10 amSTL - ORD
Nonstop1h 31mUnited Airlines
Deal found 3/17$148
Wed 5/17:45 pmORD - STL
Nonstop1h 30mUnited Airlines
Sat 5/411:10 amSTL - ORD
Nonstop1h 25mUnited Airlines
Deal found 3/17$158
Mon 4/18:50 amORD - STL
Nonstop1h 24mUnited Airlines
Mon 4/85:25 pmSTL - ORD
Nonstop1h 20mUnited Airlines
Deal found 3/18$310
Thu 6/1312:50 pmORD - STL
Nonstop1h 24mUnited Airlines
Fri 6/146:30 amSTL - ORD
Nonstop1h 34mUnited Airlines
Deal found 3/18$327
Mon 4/12:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Tue 4/26:00 amSTL - ORD
Nonstop1h 31mUnited Airlines
Deal found 3/18$369
Thu 3/2812:55 pmORD - STL
Nonstop1h 28mUnited Airlines
Thu 3/285:30 pmSTL - ORD
Nonstop1h 20mUnited Airlines
Deal found 3/18$505

Cheap American Airlines flights from Chicago to St. Louis

Explore cheap flight options specifically provided by American Airlines for the route between Chicago 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 3,145,932 searches. Data last updated March 19, 2024.
Have a look at some of the cheapest available American Airlines flights departing from Chicago and landing in St. Louis. Check back soon if you're not seeing flights that suit your needs.
Sat 4/207:14 pmORD - STL
Nonstop1h 15mAmerican Airlines
Sun 4/216:05 amSTL - ORD
Nonstop1h 19mAmerican Airlines
Deal found 3/18$118
Tue 4/163:08 pmORD - STL
Nonstop1h 14mAmerican Airlines
Tue 4/235:25 pmSTL - ORD
Nonstop1h 15mAmerican Airlines
Deal found 3/18$119
Tue 4/239:54 amORD - STL
Nonstop1h 22mAmerican Airlines
Wed 4/245:15 amSTL - ORD
1 stop7h 09mAmerican Airlines
Deal found 3/18$126
Tue 4/1612:20 pmORD - STL
1 stop5h 42mAmerican Airlines
Tue 4/235:25 pmSTL - ORD
Nonstop1h 15mAmerican Airlines
Deal found 3/18$127
Fri 5/33:08 pmORD - STL
Nonstop1h 14mAmerican Airlines
Sun 5/55:51 amSTL - ORD
Nonstop1h 19mAmerican Airlines
Deal found 3/18$139
Wed 4/175:30 amORD - STL
1 stop4h 43mAmerican Airlines
Thu 4/186:05 amSTL - ORD
Nonstop1h 19mAmerican Airlines
Deal found 3/18$146
Tue 4/93:08 pmORD - STL
Nonstop1h 14mAmerican Airlines
Wed 4/107:10 amSTL - ORD
1 stop5h 14mAmerican Airlines
Deal found 3/18$147
Tue 4/235:30 amORD - STL
1 stop7h 00mAmerican Airlines
Wed 4/245:15 amSTL - ORD
1 stop5h 00mAmerican Airlines
Deal found 3/18$153
Tue 4/1612:20 pmORD - STL
1 stop5h 42mAmerican Airlines
Tue 4/234:41 pmSTL - ORD
1 stop6h 07mAmerican Airlines
Deal found 3/18$154

Cheap Chicago to St. Louis flights in March & April 2024

Find cheap flight options from Chicago to St. Louis specifically for the months of March and April 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Prices were last updated on March 19, 2024.
The lowest fares we've come across on flights traveling from Chicago to St. Louis in March and April 2024. For more flight deals, be sure to check back very soon.
Tue 4/232:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Tue 4/235:25 pmSTL - ORD
Nonstop1h 20mUnited Airlines
Deal found 3/18$93
Sat 4/202:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Tue 4/235:25 pmSTL - ORD
Nonstop1h 20mUnited Airlines
Deal found 3/18$99
Sat 4/207:14 pmORD - STL
Nonstop1h 15mAmerican Airlines
Sun 4/216:05 amSTL - ORD
Nonstop1h 19mAmerican Airlines
Deal found 3/18$118
Sat 4/271:50 pmORD - STL
Nonstop1h 20mAmerican Airlines
Mon 4/295:25 pmSTL - ORD
Nonstop1h 15mAmerican Airlines
Deal found 3/18$119
Tue 4/239:54 amORD - STL
Nonstop1h 22mAmerican Airlines
Wed 4/245:15 amSTL - ORD
1 stop7h 09mAmerican Airlines
Deal found 3/18$126
Tue 4/1612:20 pmORD - STL
1 stop5h 42mAmerican Airlines
Tue 4/235:25 pmSTL - ORD
Nonstop1h 15mAmerican Airlines
Deal found 3/18$127
Fri 4/192:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Sun 4/2111:10 amSTL - ORD
Nonstop1h 21mUnited Airlines
Deal found 3/17$128
Thu 4/183:08 pmORD - STL
Nonstop1h 14mAmerican Airlines
Fri 4/196:05 amSTL - ORD
Nonstop1h 19mAmerican Airlines
Deal found 3/18$139
Tue 4/235:30 amMDW - STL
1 stop10h 20mFrontier
Wed 4/248:04 pmSTL - MDW
1 stop12h 32mFrontier
Deal found 3/18$141

Chicago to St. Louis 2024 flight deals

Discover exclusive flight deals for travel between Chicago and St. Louis in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,145,932 searches. Data last updated March 19, 2024.
The lowest fares we've come across on flights traveling from Chicago to St. Louis in March and April 2024. For more flight deals, be sure to check back very soon.
Tue 4/232:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Tue 4/235:25 pmSTL - ORD
Nonstop1h 20mUnited Airlines
Deal found 3/18$93
Sat 4/202:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Tue 4/235:25 pmSTL - ORD
Nonstop1h 20mUnited Airlines
Deal found 3/18$99
Sat 4/207:14 pmORD - STL
Nonstop1h 15mAmerican Airlines
Sun 4/216:05 amSTL - ORD
Nonstop1h 19mAmerican Airlines
Deal found 3/18$118
Sat 4/271:50 pmORD - STL
Nonstop1h 20mAmerican Airlines
Mon 4/295:25 pmSTL - ORD
Nonstop1h 15mAmerican Airlines
Deal found 3/18$119
Tue 4/239:54 amORD - STL
Nonstop1h 22mAmerican Airlines
Wed 4/245:15 amSTL - ORD
1 stop7h 09mAmerican Airlines
Deal found 3/18$126
Tue 4/1612:20 pmORD - STL
1 stop5h 42mAmerican Airlines
Tue 4/235:25 pmSTL - ORD
Nonstop1h 15mAmerican Airlines
Deal found 3/18$127
Fri 4/192:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Sun 4/2111:10 amSTL - ORD
Nonstop1h 21mUnited Airlines
Deal found 3/17$128
Fri 5/33:08 pmORD - STL
Nonstop1h 14mAmerican Airlines
Sun 5/55:51 amSTL - ORD
Nonstop1h 19mAmerican Airlines
Deal found 3/18$139
Tue 4/235:30 amMDW - STL
1 stop10h 20mFrontier
Wed 4/248:04 pmSTL - MDW
1 stop12h 32mFrontier
Deal found 3/18$141

Non-stop flights to St. Louis from Chicago

Discover non-stop flight options from Chicago 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 3,145,932 searches. Data last updated March 19, 2024.
For a quicker trip, book one of these direct flights from Chicago to St. Louis. Users seeking other options on flights from Chicago to St. Louis should update the search form at the top of the page.
Tue 4/232:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Tue 4/235:25 pmSTL - ORD
Nonstop1h 20mUnited Airlines
Deal found 3/18$93
Sat 4/202:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Tue 4/235:25 pmSTL - ORD
Nonstop1h 20mUnited Airlines
Deal found 3/18$99
Sat 4/207:14 pmORD - STL
Nonstop1h 15mAmerican Airlines
Sun 4/216:05 amSTL - ORD
Nonstop1h 19mAmerican Airlines
Deal found 3/18$118
Sat 4/271:50 pmORD - STL
Nonstop1h 20mAmerican Airlines
Mon 4/295:25 pmSTL - ORD
Nonstop1h 15mAmerican Airlines
Deal found 3/18$119
Fri 4/192:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Sun 4/2111:10 amSTL - ORD
Nonstop1h 21mUnited Airlines
Deal found 3/17$128
Fri 5/33:08 pmORD - STL
Nonstop1h 14mAmerican Airlines
Sun 5/55:51 amSTL - ORD
Nonstop1h 19mAmerican Airlines
Deal found 3/18$139
Thu 4/112:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Sun 4/1410:10 amSTL - ORD
Nonstop1h 31mUnited Airlines
Deal found 3/17$148
Wed 5/17:45 pmORD - STL
Nonstop1h 30mUnited Airlines
Sat 5/411:10 amSTL - ORD
Nonstop1h 25mUnited Airlines
Deal found 3/17$158
Sat 4/137:14 pmORD - STL
Nonstop1h 15mAmerican Airlines
Sun 4/1410:09 amSTL - ORD
Nonstop1h 20mAmerican Airlines
Deal found 3/19$159

Chicago to St. Louis flights leaving soon

Find last-minute flight options from Chicago 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 3,145,932 searches. Data last updated March 19, 2024.
Have a look at some of the flights available from Chicago to St. Louis departing last-minute. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Tue 3/265:15 pmORD - STL
1 stop3h 05mSouthern / Mokulele
Fri 3/293:55 pmSTL - ORD
1 stop3h 15mSouthern / Mokulele
Deal found 3/18$178
Fri 3/295:15 pmORD - STL
1 stop3h 05mSouthern / Mokulele
Sun 3/313:55 pmSTL - ORD
1 stop3h 15mSouthern / Mokulele
Deal found 3/18$180
Tue 3/265:15 pmORD - STL
1 stop3h 05mSouthern / Mokulele
Wed 3/278:55 pmSTL - ORD
1 stop10h 30mSouthern / Mokulele
Deal found 3/18$186
Mon 3/257:45 pmORD - STL
1 stop11h 15mSouthern / Mokulele
Tue 3/263:55 pmSTL - ORD
1 stop15h 30mSouthern / Mokulele
Deal found 3/18$187
Thu 3/285:15 pmORD - STL
1 stop3h 05mSouthern / Mokulele
Tue 4/28:55 pmSTL - ORD
1 stop10h 30mSouthern / Mokulele
Deal found 3/19$193
Wed 3/276:46 amORD - STL
2 stops13h 27mMultiple Airlines
Fri 3/293:55 pmSTL - ORD
1 stop3h 15mMultiple Airlines
Deal found 3/18$231
Tue 3/2610:10 pmORD - STL
2 stops22h 03mMultiple Airlines
Fri 3/2912:00 pmSTL - ORD
1 stop4h 10mMultiple Airlines
Deal found 3/18$233
Tue 3/269:15 pmORD - STL
3 stops22h 58mMultiple Airlines
Fri 3/293:55 pmSTL - ORD
1 stop3h 15mMultiple Airlines
Deal found 3/18$284
Wed 3/275:30 amORD - STL
3 stops14h 43mMultiple Airlines
Fri 3/293:55 pmSTL - ORD
1 stop3h 15mMultiple Airlines
Deal found 3/18$288

One-way flights to St. Louis from Chicago

Search for one-way flight options from Chicago 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 3,145,932 searches. Data last updated March 19, 2024.
Take a look at some of the best available options we've come across on one-way flights from Chicago to St. Louis. Users in need of a round-trip flight from Chicago to St. Louis instead should update the search form at the top of page.
Tue 4/169:54 amORD - STL
Nonstop1h 22mAmerican Airlines
Deal found 3/17$49
Wed 4/173:08 pmORD - STL
Nonstop1h 14mAmerican Airlines
Deal found 3/18$50
Fri 5/37:14 pmORD - STL
Nonstop1h 15mAmerican Airlines
Deal found 3/16$59
Tue 4/95:58 pmORD - STL
1 stop26h 55mMultiple Airlines
Deal found 3/16$67
Tue 4/1610:55 pmMDW - STL
1 stop10h 52mFrontier
Deal found 3/17$68
Tue 4/166:27 pmORD - STL
1 stop15h 20mFrontier
Deal found 3/17$68
Thu 4/188:50 amORD - STL
Nonstop1h 24mUnited Airlines
Deal found 3/18$70
Wed 5/88:25 amORD - STL
1 stop12h 28mFrontier
Deal found 3/18$73
Wed 4/312:51 pmORD - STL
1 stop7h 22mSpirit Airlines
Deal found 3/17$77

Find flights from Chicago to St. Louis within your budget

Customize your flight search to find flights from Chicago 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 3,145,932 searches. Data last updated March 19, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$93 - $225

Route

Depart

Return

Price

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 4/23

Nonstop1h 22m

Lambert-St Louis

Tue 4/23

Nonstop1h 20m

$93

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 4/20

Nonstop1h 22m

Lambert-St Louis

Tue 4/23

Nonstop1h 20m

$99

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 4/20

Nonstop1h 15m

Lambert-St Louis

Sun 4/21

Nonstop1h 19m

$118

Chicago MidwayLambert-St Louis

MDW - STL

MDWSTL

Chicago Midway

Tue 4/23

1 stop10h 20m

Lambert-St Louis

Wed 4/24

1 stop12h 32m

$141

Chicago MidwayLambert-St Louis

MDW - STL

MDWSTL

Chicago Midway

Wed 5/1

1 stop5h 56m

Lambert-St Louis

Sat 5/4

1 stop4h 34m

$156

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 4/17

1 stop3h 05m

Lambert-St Louis

Thu 4/18

1 stop7h 05m

$174

Chicago MidwayLambert-St Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 4/25

Nonstop1h 15m

Lambert-St Louis

Fri 4/26

Nonstop1h 05m

$179

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Mon 4/8

2 stops15h 40m

Lambert-St Louis

Wed 4/10

1 stop10h 30m

$202

Chicago O'Hare IntlLambert-St Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sun 4/7

2 stops19h 27m

Lambert-St Louis

Thu 4/11

1 stop15h 14m

$225

Flights are sorted by cheapest first

Deals found on 3/18

When is the best time to book a flight from Chicago to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to St. Louis. Price data was last updated on January 28, 2024.
The price you pay for your flight from Chicago to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 38 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

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

Use this chart to determine the cheapest time to fly round-trip from Chicago to St. Louis. Price data was last updated on March 10, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Chicago to St. Louis flight should consider departing on Saturday afternoons when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to St. Louis by month

Plan your trip from Chicago to St. Louis by taking into account the cheapest months to travel. The average price of a one-way flight from Chicago to St. Louis is currently $65 while a round-trip flight costs $154. Price data was last updated on March 10, 2024.

Currently, September is the cheapest month in which you can book a flight from Chicago to St. Louis (average of $323). Flying from Chicago to St. Louis in June is currently the most expensive (average of $386). 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.

January

$326

February

$331

March

$358

April

$356

May

$358

June

$386

July

$382

August

$336

September

$323

October

$323

November

$336

December

$326

Temperature and rainfall in St. Louis by month

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

STL

Temperature

32 - 80.6 °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 March 19, 2024.
To help decide which airline to fly from Chicago to St. Louis, see what other customers have to say about United Airlines, American Airlines and Frontier. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,382 reviews

Food

7.4

Entertainment

7.9

Overall

8.2

Crew

8.8

Boarding

8.3

Comfort

8.1

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

Southwest
8.2
Very good
6,382 reviews
Southwest
8.2
Very good
6,382 reviews

Food

7.4

Entertainment

7.9

Overall

8.2

Crew

8.8

Boarding

8.3

Comfort

8.1

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

8.1
Very good
11,551 reviews
Southwest
8.2
Very good
6,382 reviews

Food

7.4

Entertainment

7.9

Overall

8.2

Crew

8.8

Boarding

8.3

Comfort

8.1

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

7.4
Good
11,602 reviews
Southwest
8.2
Very good
6,382 reviews

Food

7.4

Entertainment

7.9

Overall

8.2

Crew

8.8

Boarding

8.3

Comfort

8.1

Reviews

1 / 10

No tray tables for food or drink not convenient nor comfortable

7.3
Good
15,312 reviews
Southwest
8.2
Very good
6,382 reviews

Food

7.4

Entertainment

7.9

Overall

8.2

Crew

8.8

Boarding

8.3

Comfort

8.1

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 Chicago 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 Chicago?

    If you book a flight to St. Louis from Chicago, 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. There are 48 flights from Chicago to Lambert-St Louis per day from 4 different airlines.

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

    Yes, there are multiple flights from Chicago to St. Louis for under $100. The cheapest flight booked recently is on United Airlines for just $93, but on average you can expect to pay $138.

  • Are there nonstop flights from Chicago to St. Louis for under $100 on Cheapflights?

    Cheapflights has at least 20 direct flights from Chicago to St. Louis under $100. A good price for a nonstop flight from Chicago to St. Louis is less than $161.

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

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

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

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

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

    Travelers can expect 11 flights from Chicago to St. Louis on average per day.
    Morning (6am - Noon) - 100% of flight departures

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

    Airlines like United Airlines, American Airlines, and Frontier fly from Chicago to St. Louis in about 1h 15m. The time it takes to get you to your destination can typically vary by up to 9h 05m. The distance from Chicago to St. Louis is about 259 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Chicago to St. Louis round-trip?

    United Airlines, at $93, was found to be the cheapest airline from Chicago to St. Louis.Alternate airlines to your destination round-trip include American Airlines and Frontier. These flights start at 65% lower than the current average price 3 months from now.

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

    One-way options have recently been found by users for as low as $49 on American Airlines. Other airlines that offer cheap prices include Frontier from $68 and United Airlines from $70 one-way.

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

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

    No one likes to see their flight delayed. When booking a flight from Chicago to St. Louis consider choosing Air Wisconsin (92%), Austrian Airlines (91%) or Envoy Air (90%) as they are the most reliable in getting you off to your destination on time.

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

    The cheapest flight price from Chicago to St. Louis is $48. On average you can expect to pay $251. The most popular route, (Chicago O'Hare Intl - Lambert-St Louis), can usually be booked for $128.

  • What does ORD to STL mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Chicago O'Hare Intl Airport to Lambert-St Louis Airport flight would often be abbreviated as a ORD to STL flight. Ready for more IATA code knowledge? These are related airports for your current travel destination: Chicago Midway Airport (MDW), Chicago Greater Rockford Airport (RFD).

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from Chicago to St. Louis

Discover the top 3 airlines that operate flights from Chicago 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 3,145,932 searches. Data last updated March 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$104Average$269FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$135Average$298FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Southern / MokuleleCheapest$140Average$162FlexibilityNo cancel feeOn-timeN/A
Search Southern / Mokulele flights

Search flights from Chicago to St. Louis by cabin class

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

Hourly flight availability from Chicago to St. Louis

Find hourly flight availability from Chicago 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 March 19, 2024.
1%of flight departuresEarly morningMidnight to 6 am
45%of flight departuresMorning6 am to noon
41%of flight departuresAfternoonNoon to 6 pm
13%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Chicago to St. Louis

Explore weekly flight availability from Chicago 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 March 19, 2024.
Sunday49daily flights
Monday54daily flights
Tuesday46daily flights
Wednesday48daily flights
Thursday52daily flights
Friday54daily flights
Saturday36daily flights

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

When you search for this flight from Chicago to St. Louis, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights helps you find that perfect flight to St. Louis from Chicago by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

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