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Cheap flights from St. Louis (STL) to Illinois from $45

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 5/7. 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.
STL — ORD
May 2 — May 91
From?
To?
Thu 5/2
Thu 5/9
1 adult, Economy
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How far in advance should I book a flight from St. Louis to Illinois?

Find a great deal and save up to 98% by booking at least 48 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Illinois within the next two weeks, with the cheapest ticket starting at $270.

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

February can be a great time to fly to Illinois from St. Louis with a flight ticket averaging about $271. Cheapflights users have found deals in the month of February for as cheap as $167. The most expensive prices can be found in the month of May.

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

When flying from St. Louis to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap American Airlines flights from St. Louis to Illinois

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Illinois. 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 2,991,349 searches. Data last updated April 27, 2024.
Take a peek at the cheapest American Airlines flights we've detected traveling from St. Louis to Illinois. Come back soon if you're not finding the exact deal you're looking for.
Tue 5/215:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Wed 5/229:50 amORD - STL
Nonstop1h 20mAmerican Airlines
Deal found 4/26$97
Thu 5/165:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Wed 5/229:50 amORD - STL
Nonstop1h 20mAmerican Airlines
Deal found 4/25$107
Sat 5/255:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Sun 5/263:04 pmORD - STL
Nonstop1h 13mAmerican Airlines
Deal found 4/26$168
Sun 5/195:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Tue 5/218:24 pmORD - STL
Nonstop1h 23mAmerican Airlines
Deal found 4/27$171
Sat 5/254:20 pmSTL - ORD
1 stop5h 09mAmerican Airlines
Sun 5/263:04 pmORD - STL
Nonstop1h 13mAmerican Airlines
Deal found 4/26$176
Tue 5/2110:46 amSTL - ORD
1 stop5h 00mAmerican Airlines
Wed 5/229:50 amORD - STL
Nonstop1h 20mAmerican Airlines
Deal found 4/26$179
Wed 7/176:04 amSTL - ORD
Nonstop1h 21mAmerican Airlines
Thu 7/2512:02 pmORD - STL
Nonstop1h 15mAmerican Airlines
Deal found 4/26$193
Wed 5/157:45 amSTL - ORD
Nonstop1h 19mAmerican Airlines
Sat 5/188:24 pmORD - STL
Nonstop1h 23mAmerican Airlines
Deal found 4/26$224
Wed 6/266:00 amSTL - ORD
Nonstop1h 22mAmerican Airlines
Thu 6/277:05 amORD - STL
1 stop7h 11mAmerican Airlines
Deal found 4/25$233

Cheap Spirit Airlines flights from St. Louis to Illinois

Explore cheap flight options specifically provided by Spirit Airlines for the route between St. Louis and Illinois. 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 2,991,349 searches. Data last updated April 27, 2024.
Some of the best deals we've found on Spirit Airlines flights traveling from St. Louis to Illinois. Check back soon if you're not seeing flights that suit your needs.
Tue 5/2110:34 amSTL - ORD
1 stop12h 55mSpirit Airlines
Wed 5/227:13 pmORD - STL
3 stops22h 16mSpirit Airlines
Deal found 4/26$180
Tue 5/2110:34 amSTL - ORD
3 stops27h 32mSpirit Airlines
Wed 5/225:41 pmORD - STL
2 stops24h 59mSpirit Airlines
Deal found 4/26$201
Thu 5/167:30 pmSTL - ORD
2 stops21h 05mSpirit Airlines
Tue 5/212:56 pmORD - STL
3 stops19h 50mSpirit Airlines
Deal found 4/26$219
Thu 5/167:30 pmSTL - ORD
2 stops21h 05mSpirit Airlines
Wed 5/227:13 pmORD - STL
3 stops22h 16mSpirit Airlines
Deal found 4/25$251
Sat 5/411:39 amSTL - ORD
2 stops9h 26mSpirit Airlines
Fri 5/105:19 pmORD - STL
2 stops23h 06mSpirit Airlines
Deal found 4/26$447
Thu 5/27:30 pmSTL - ORD
2 stops21h 15mSpirit Airlines
Mon 5/610:00 pmORD - STL
2 stops11h 44mSpirit Airlines
Deal found 4/26$471

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

Find cheap flight options from St. Louis to Illinois specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,991,349 searches. Prices were last updated on April 27, 2024.
These are some of the most attractive deals on flights from St. Louis to Illinois in 2024. Check back regularly for other flight deals.
Tue 5/283:55 pmSTL - UIN
Nonstop0h 50mSouthern / Mokulele
Tue 5/287:30 pmUIN - STL
Nonstop0h 50mSouthern / Mokulele
Deal found 4/27$76
Tue 5/215:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Wed 5/229:50 amORD - STL
Nonstop1h 20mAmerican Airlines
Deal found 4/26$97
Sat 5/255:31 pmSTL - ORD
Nonstop1h 24mUnited Airlines
Sun 5/262:20 pmORD - STL
Nonstop1h 21mUnited Airlines
Deal found 4/26$104
Thu 5/165:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Wed 5/229:50 amORD - STL
Nonstop1h 20mAmerican Airlines
Deal found 4/25$107
Tue 5/1410:34 amSTL - ORD
1 stop12h 55mMultiple Airlines
Wed 5/159:25 pmORD - STL
1 stop14h 05mMultiple Airlines
Deal found 4/26$129
Fri 5/1012:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Tue 5/149:25 pmORD - STL
1 stop14h 20mSouthern / Mokulele
Deal found 4/26$130
Sat 5/412:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Sat 5/119:25 pmORD - STL
1 stop14h 05mSouthern / Mokulele
Deal found 4/26$132
Fri 5/312:00 pmSTL - ORD
1 stop19h 40mSouthern / Mokulele
Sun 5/59:25 pmORD - STL
1 stop14h 05mSouthern / Mokulele
Deal found 4/25$136
Thu 5/1612:15 pmSTL - ORD
1 stop3h 35mSouthern / Mokulele
Tue 5/218:20 pmORD - STL
1 stop15h 25mSouthern / Mokulele
Deal found 4/26$137

St. Louis to Illinois 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Illinois in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 27, 2024.
These are some of the most attractive deals on flights from St. Louis to Illinois in 2024. Check back regularly for other flight deals.
Wed 5/159:45 amSTL - UIN
Nonstop0h 50mSouthern / Mokulele
Fri 5/1711:15 amUIN - STL
Nonstop0h 50mSouthern / Mokulele
Deal found 4/27$58
Tue 5/283:55 pmSTL - UIN
Nonstop0h 50mSouthern / Mokulele
Tue 5/287:30 pmUIN - STL
Nonstop0h 50mSouthern / Mokulele
Deal found 4/27$76
Tue 5/215:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Wed 5/229:50 amORD - STL
Nonstop1h 20mAmerican Airlines
Deal found 4/26$97
Sat 5/255:31 pmSTL - ORD
Nonstop1h 24mUnited Airlines
Sun 5/262:20 pmORD - STL
Nonstop1h 21mUnited Airlines
Deal found 4/26$104
Thu 5/165:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Wed 5/229:50 amORD - STL
Nonstop1h 20mAmerican Airlines
Deal found 4/25$107
Tue 10/111:09 amSTL - ORD
Nonstop1h 21mUnited Airlines
Tue 11/52:03 pmORD - STL
Nonstop1h 18mUnited Airlines
Deal found 4/26$114
Tue 7/309:35 amSTL - UIN
Nonstop0h 50mSouthern / Mokulele
Thu 8/16:10 amUIN - STL
Nonstop0h 50mSouthern / Mokulele
Deal found 4/27$119
Tue 5/1410:34 amSTL - ORD
1 stop12h 55mMultiple Airlines
Wed 5/159:25 pmORD - STL
1 stop14h 05mMultiple Airlines
Deal found 4/26$129
Fri 5/1012:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Tue 5/149:25 pmORD - STL
1 stop14h 20mSouthern / Mokulele
Deal found 4/26$130

Non-stop flights to Illinois from St. Louis

Discover non-stop flight options from St. Louis to Illinois. 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 2,991,349 searches. Data last updated April 27, 2024.
For a shorter flight, select one of these non-stop flights from St. Louis to Illinois. Users can also choose from other St. Louis to Illinois flights by using the search form above.
Wed 5/159:45 amSTL - UIN
Nonstop0h 50mSouthern / Mokulele
Fri 5/1711:15 amUIN - STL
Nonstop0h 50mSouthern / Mokulele
Deal found 4/27$58
Tue 5/283:55 pmSTL - UIN
Nonstop0h 50mSouthern / Mokulele
Tue 5/287:30 pmUIN - STL
Nonstop0h 50mSouthern / Mokulele
Deal found 4/27$76
Tue 5/215:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Wed 5/229:50 amORD - STL
Nonstop1h 20mAmerican Airlines
Deal found 4/26$97
Sat 5/255:31 pmSTL - ORD
Nonstop1h 24mUnited Airlines
Sun 5/262:20 pmORD - STL
Nonstop1h 21mUnited Airlines
Deal found 4/26$104
Thu 5/165:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Wed 5/229:50 amORD - STL
Nonstop1h 20mAmerican Airlines
Deal found 4/25$107
Tue 7/309:35 amSTL - UIN
Nonstop0h 50mSouthern / Mokulele
Thu 8/16:10 amUIN - STL
Nonstop0h 50mSouthern / Mokulele
Deal found 4/27$119
Mon 5/2010:10 amSTL - ORD
Nonstop1h 31mUnited Airlines
Wed 5/222:24 pmORD - STL
Nonstop1h 22mUnited Airlines
Deal found 4/26$164
Sat 5/255:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Sun 5/263:04 pmORD - STL
Nonstop1h 13mAmerican Airlines
Deal found 4/26$168
Sun 5/195:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Tue 5/218:24 pmORD - STL
Nonstop1h 23mAmerican Airlines
Deal found 4/27$171

St. Louis to Illinois flights leaving soon

Find last-minute flight options from St. Louis to Illinois 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 2,991,349 searches. Data last updated April 27, 2024.
Have a look at some of the last-minute flights available departing from St. Louis to Illinois. To prevent any unwanted surprises, users should verify their flight info before booking.
Sat 5/412:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Sat 5/119:25 pmORD - STL
1 stop14h 05mSouthern / Mokulele
Deal found 4/26$132
Fri 5/312:00 pmSTL - ORD
1 stop19h 40mSouthern / Mokulele
Sun 5/59:25 pmORD - STL
1 stop14h 05mSouthern / Mokulele
Deal found 4/25$136
Thu 5/22:00 pmSTL - ORD
1 stop17h 40mSouthern / Mokulele
Mon 5/68:15 amORD - STL
1 stop8h 30mSouthern / Mokulele
Deal found 4/26$143
Sat 5/412:00 pmSTL - ORD
1 stop19h 40mSouthern / Mokulele
Wed 5/89:25 pmORD - STL
1 stop14h 05mSouthern / Mokulele
Deal found 4/26$145
Sat 5/412:00 pmSTL - ORD
1 stop19h 40mSouthern / Mokulele
Tue 5/79:25 pmORD - STL
1 stop14h 05mSouthern / Mokulele
Deal found 4/27$150
Fri 5/32:00 pmSTL - ORD
1 stop17h 40mSouthern / Mokulele
Sun 5/59:25 pmORD - STL
1 stop14h 05mSouthern / Mokulele
Deal found 4/27$151
Sun 5/512:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Sat 5/1112:30 pmORD - STL
1 stop18h 30mSouthern / Mokulele
Deal found 4/27$152
Thu 5/28:55 pmSTL - ORD
1 stop10h 30mSouthern / Mokulele
Sun 5/59:25 pmORD - STL
1 stop19h 20mSouthern / Mokulele
Deal found 4/26$153
Thu 5/29:35 amSTL - ORD
1 stop7h 05mSouthern / Mokulele
Thu 5/99:25 pmORD - STL
1 stop19h 20mSouthern / Mokulele
Deal found 4/27$157

One-way flights to Illinois from St. Louis

Search for one-way flight options from St. Louis to Illinois. 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 2,991,349 searches. Data last updated April 27, 2024.
Some of the best available deals we've found on one-way flights from St. Louis to Illinois. Users in need of a round-trip flight from St. Louis to Illinois instead should update the search form at the top of page.
Tue 5/710:34 amSTL - ORD
1 stop13h 46mSpirit Airlines
Deal found 4/26$45
Sun 5/269:52 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Deal found 4/27$46
Tue 5/215:55 amSTL - ORD
Nonstop1h 16mAmerican Airlines
Deal found 4/26$49
Tue 5/72:35 pmSTL - ORD
2 stops19h 20mSpirit Airlines
Deal found 4/26$58
Sat 5/1111:39 amSTL - ORD
1 stop7h 54mSpirit Airlines
Deal found 4/26$59
Mon 5/2012:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Deal found 4/26$63
Mon 5/612:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Deal found 4/26$65
Sat 5/412:00 pmSTL - ORD
1 stop4h 10mSouthern / Mokulele
Deal found 4/27$66
Sun 5/1912:15 pmSTL - ORD
1 stop3h 35mSouthern / Mokulele
Deal found 4/27$70

Find flights from St. Louis to Illinois within your budget

Customize your flight search to find flights from St. Louis to Illinois 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 2,991,349 searches. Data last updated April 27, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$97 - $215

Route

Depart

Return

Price

Lambert-St LouisChicago O'Hare Intl

STL - ORD

STLORD

Lambert-St Louis

Tue 5/21

Nonstop1h 16m

Chicago O'Hare Intl

Wed 5/22

Nonstop1h 20m

$97

Lambert-St LouisChicago O'Hare Intl

STL - ORD

STLORD

Lambert-St Louis

Sat 5/25

Nonstop1h 24m

Chicago O'Hare Intl

Sun 5/26

Nonstop1h 21m

$104

Lambert-St LouisChicago O'Hare Intl

STL - ORD

STLORD

Lambert-St Louis

Thu 5/16

Nonstop1h 16m

Chicago O'Hare Intl

Wed 5/22

Nonstop1h 20m

$107

Lambert-St LouisQuincy Regional

STL - UIN

STLUIN

Lambert-St Louis

Tue 7/30

Nonstop0h 50m

Quincy Regional

Thu 8/1

Nonstop0h 50m

$119

Lambert-St LouisChicago O'Hare Intl

STL - ORD

STLORD

Lambert-St Louis

Tue 5/14

1 stop12h 55m

Chicago O'Hare Intl

Wed 5/15

1 stop14h 05m

$129

Lambert-St LouisChicago Midway

STL - MDW

STLMDW

Lambert-St Louis

Tue 5/28

1 stop6h 10m

Chicago Midway

Fri 5/31

1 stop4h 52m

$156

Lambert-St LouisChicago O'Hare Intl

STL - ORD

STLORD

Lambert-St Louis

Tue 5/21

1 stop12h 55m

Chicago O'Hare Intl

Wed 5/22

3 stops22h 16m

$180

Lambert-St LouisChicago Midway

STL - MDW

STLMDW

Lambert-St Louis

Mon 5/20

Nonstop1h 05m

Chicago Midway

Wed 5/22

Nonstop1h 10m

$182

Lambert-St LouisChicago O'Hare Intl

STL - ORD

STLORD

Lambert-St Louis

Fri 7/26

1 stop17h 35m

Chicago O'Hare Intl

Sun 7/28

1 stop20h 17m

$215

Flights are sorted by cheapest first

Deals found on 4/26

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

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated April 27, 2024.
Peruse reviews from past customers who have flown with American Airlines, Spirit Airlines and Southern / Mokulele from St. Louis to Illinois to help guide your decision. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,155 reviews
Check prices

Crew

8.7

Entertainment

7.8

Overall

8.2

Boarding

8.3

Comfort

8.1

Food

7.4

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

Southwest
8.2
Very good
6,155 reviews
Southwest
8.2
Very good
6,155 reviews
Check prices

Crew

8.7

Entertainment

7.8

Overall

8.2

Boarding

8.3

Comfort

8.1

Food

7.4

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

Delta
8.1
Very good
10,951 reviews
Southwest
8.2
Very good
6,155 reviews
Check prices

Crew

8.7

Entertainment

7.8

Overall

8.2

Boarding

8.3

Comfort

8.1

Food

7.4

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

United Airlines
7.4
Good
11,228 reviews
Southwest
8.2
Very good
6,155 reviews
Check prices

Crew

8.7

Entertainment

7.8

Overall

8.2

Boarding

8.3

Comfort

8.1

Food

7.4

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

American Airlines
7.3
Good
14,875 reviews
Southwest
8.2
Very good
6,155 reviews
Check prices

Crew

8.7

Entertainment

7.8

Overall

8.2

Boarding

8.3

Comfort

8.1

Food

7.4

Reviews

1 / 10

I was traveling with a companion that utilizes a scooter to get around. We have flown together many times and used other airlines. Southwest by far is the most accommodating airline in the fleet your staff Makes the accessibility easy and convenient for for this type of travel. We would personally like to think the flight teams of our two flights for being very accommodating and helpful throughout our trip.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Illinois. 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 from for flights from St. Louis to Illinois?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to Illinois from St. Louis.

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

    Yes, there are multiple flights from St. Louis to Illinois for under $100. The cheapest flight booked recently is on American Airlines for just $97, but on average you can expect to pay $136.

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

    Cheapflights has at least 20 direct flights from St. Louis to Illinois under $100. A good price for a nonstop flight from St. Louis to Illinois is less than $185.

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

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

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

    You can find nonstop flights on the following days: Sunday, Monday, Tuesday, Wednesday, Thursday, Saturday.

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

    On average 44 flights depart from St. Louis to Illinois per day.
    Morning (6am - Noon) - 80% of flight departures
    Afternoon (Noon - 6pm) - 20% of flight departures

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

    A quick flight from St. Louis to Illinois can take about 50m. American Airlines provides one of the quickest options available for as low as $97. St. Louis and Illinois are separated by a distance of 259 mi. All flights are typically nonstop.

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

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $45. Users have also found prices from $46 and $63 on American Airlines and Southern / Mokulele, respectively.

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

    Most travelers choose Lambert-St Louis - Chicago O'Hare Intl, Lambert-St Louis - Chicago Midway or Lambert-St Louis - Quincy Regional when deciding on the best route from St. Louis to Illinois.

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

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

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

    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 St. Louis to Illinois on time: Copa Airlines (100%), Air Wisconsin (100%), GoJet (96%).

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

    The cheapest flight price from St. Louis to Illinois is $105. On average you can expect to pay $1,162. The most popular route, (Lambert-St Louis - Chicago O'Hare Intl), can usually be booked for $136.

  • What does STL to ORD mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Lambert-St Louis Airport to Chicago O'Hare Intl Airport flight would often be abbreviated as a STL to ORD flight. While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: Chicago Midway Airport (MDW), Moline Quad-City Airport (MLI), Greater Peoria Airport (PIA), Bloomington-Normal Airport (BMI), Springfield Capital Airport (SPI).

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

    The amount of baggage you can bring on your St. Louis to Illinois 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 St. Louis to Illinois with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Illinois 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 St. Louis to Illinois that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Illinois 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 St. Louis to Illinois that allow pets onboard?

    Many airlines flying from St. Louis to Illinois 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 St. Louis to Illinois?

    Yes, you can often find last-minute deals on St. Louis to Illinois 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 St. Louis to Illinois flight deals updated?

    The St. Louis to Illinois flight deals you see on this page were last updated on 4/27.

See more FAQs

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Top 4 airlines flying from St. Louis to Illinois

Discover the top 4 airlines that operate flights from St. Louis to Illinois. 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 2,991,349 searches. Data last updated April 27, 2024.
AirlineCheapestAverageFlexibilityOn-time
Southern / MokuleleCheapest$99Average$169FlexibilityNo cancel feeOn-timeN/A
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American AirlinesCheapest$128Average$282FlexibilityNo cancel feeOn-time71%
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United AirlinesCheapest$133Average$296FlexibilityNo cancel feeOn-time69%
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DeltaCheapest$238Average$300FlexibilityNo cancel feeOn-timeN/A
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Search flights from St. Louis to Illinois by cabin class

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

Find hourly flight availability from St. Louis to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 27, 2024.
18%of flight departuresEarly morningMidnight to 6 am
55%of flight departuresMorning6 am to noon
27%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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