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Southwest Illinois

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Southwest Illinois Flights as Low as $156

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Frontier Airlines
Thu, Aug 21 - Thu, Aug 28
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$156 Roundtrip, found 23 hours ago
$156
Roundtrip
found 23 hours ago
Select Frontier Airlines flight, departing Thu, Aug 21 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Thu, Aug 28, priced at $156 found 23 hours ago
Frontier Airlines
Sun, Jun 22 - Thu, Jun 26
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$158 Roundtrip, found 5 days ago
$158
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sun, Jun 22 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Thu, Jun 26, priced at $158 found 5 days ago
Frontier Airlines
Thu, Jun 19 - Sat, Jun 28
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$167 Roundtrip, found 11 hours ago
$167
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Thu, Jun 19 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Sat, Jun 28, priced at $167 found 11 hours ago
Frontier Airlines
Thu, Jun 19 - Sun, Jun 22
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$169 Roundtrip, found 1 day ago
$169
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Jun 19 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $169 found 1 day ago
Frontier Airlines
Thu, Jun 12 - Sat, Jun 14
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$173 Roundtrip, found 6 days ago
$173
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Thu, Jun 12 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Sat, Jun 14, priced at $173 found 6 days ago
Frontier Airlines
Thu, Jun 12 - Sat, Jun 21
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$176 Roundtrip, found 6 days ago
$176
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Thu, Jun 12 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Sat, Jun 21, priced at $176 found 6 days ago
American Airlines
Thu, Aug 21 - Thu, Aug 28
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$178 Roundtrip, found 23 hours ago
$178
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Thu, Aug 21 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Thu, Aug 28, priced at $178 found 23 hours ago
United
Wed, Aug 27 - Thu, Sep 4
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$180 Roundtrip, found 11 hours ago
$180
Roundtrip
found 11 hours ago
Select United flight, departing Wed, Aug 27 from Seattle - Tacoma Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $180 found 11 hours ago
Spirit Airlines
Thu, Jun 19 - Sat, Jun 28
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$184 Roundtrip, found 11 hours ago
$184
Roundtrip
found 11 hours ago
Select Spirit Airlines flight, departing Thu, Jun 19 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Sat, Jun 28, priced at $184 found 11 hours ago
Delta
Tue, Aug 19 - Tue, Aug 26
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$189 Roundtrip, found 3 hours ago
$189
Roundtrip
found 3 hours ago
Select Delta flight, departing Tue, Aug 19 from Seattle - Tacoma Intl. to Lambert-St. Louis Intl., returning Tue, Aug 26, priced at $189 found 3 hours ago
American Airlines
Tue, Aug 19 - Tue, Aug 26
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$189 Roundtrip, found 3 hours ago
$189
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Tue, Aug 19 from Seattle - Tacoma Intl. to Lambert-St. Louis Intl., returning Tue, Aug 26, priced at $189 found 3 hours ago
Delta
Thu, Aug 21 - Mon, Aug 25
DAL
Love Field
STL
Lambert-St. Louis Intl.
$233 Roundtrip, found 5 days ago
$233
Roundtrip
found 5 days ago
Select Delta flight, departing Thu, Aug 21 from Love Field to Lambert-St. Louis Intl., returning Mon, Aug 25, priced at $233 found 5 days ago
Alaska Airlines
Tue, Aug 26 - Mon, Sep 1
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$249 Roundtrip, found 2 hours ago
$249
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Tue, Aug 26 from Seattle - Tacoma Intl. to Lambert-St. Louis Intl., returning Mon, Sep 1, priced at $249 found 2 hours ago
Spirit Airlines
Thu, Aug 21 - Thu, Aug 28
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$278 Roundtrip, found 23 hours ago
$278
Roundtrip
found 23 hours ago
Select Spirit Airlines flight, departing Thu, Aug 21 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Thu, Aug 28, priced at $278 found 23 hours ago
American Airlines
Wed, Aug 20 - Wed, Aug 27
DFW
Dallas-Fort Worth Intl.
PAH
Barkley Regional
$408 Roundtrip, found 10 hours ago
$408
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Wed, Aug 20 from Dallas-Fort Worth Intl. to Barkley Regional, returning Wed, Aug 27, priced at $408 found 10 hours ago
United
Tue, Jun 24 - Fri, Jun 27
SEA
Seattle - Tacoma Intl.
PAH
Barkley Regional
$632 Roundtrip, found 2 days ago
$632
Roundtrip
found 2 days ago
Select United flight, departing Tue, Jun 24 from Seattle - Tacoma Intl. to Barkley Regional, returning Fri, Jun 27, priced at $632 found 2 days ago

Cheap Flights to Southwest Illinois

Fall in love at first flight with your vacation to Southwest Illinois by saving a ton of cash on your last-minute cheap flight. There’s no more scouring the internet for a good deal—book your flight to Southwest Illinois on Hotwire, and you’ll be up, up, and on a getaway in no time.

Because once the wheels are down in Southwest Illinois, the good times start rolling. So buckle up, you’re in for a fun ride.

Frequently Asked Questions About flights to Southwest Illinois

Don’t waste your time on endless searches for cheap airline tickets oneway or roundtrip. We’ll have you on your way to Southwest Illinois with a tiny bag of pretzels in your hand before you can say “tray tables in the upright position”—and for a ticket price that works for your vacay budget.

So all you have to worry about is where you’re headed after the STL airport.

What is the cheapest month to fly to Southwest Illinois?

Airline ticket prices fluctuate all the time, depending on the day of the week or the month of the year. The cheapest round trip flights to Southwest Illinois are in August, but when you book your flight on Hotwire, savings are always in season.

How many airlines fly to Southwest Illinois?

Variety is the spice of life, even when it comes to booking your next trip. Want options for airlines? You’ll find 16 to choose from for your flight to Southwest Illinois.

What airport is best to fly into Southwest Illinois?

When you’re planning your trip to Southwest Illinois, convenience is the name of the game. Luckily, Southwest Illinois Williamson County Regional Airport is nearby so you can deplane and get going on checking off everything on your Southwest Illinois must-do list.

How much are flights to Southwest Illinois?

Got very cheap flights on your vacation itinerary? When you book your airline tickets to Southwest Illinois on Hotwire, you may just get what’s on your getaway wish list. With tickets as low as $156, you’ll have leftover cash for at least a magazine and a bottle of water at the airport book store.

How to get cheap flights to Southwest Illinois?

The trick to saving a stack of cash on your flight to Southwest Illinois? Snatch up that Hotwire flight deal when you see a killer rate because it could be gone in a flash. And with flights as low as $156 right now, why wait?

Southwest Illinois Flight Information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Roundtrip price
$156

Last Minute Hotel Deals in Southwest Illinois

Drury Plaza Hotel Mt. Vernon
Drury Plaza Hotel Mt. Vernon
3 out of 5
145 North 44th Street , Mount Vernon, IL
Stay at this 3-star business-friendly hotel in Mount Vernon. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the helpful ...
9.6/10 Exceptional! (1,322 reviews)
Great hotel
"Great experience"

Reviewed on May 22, 2025

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Drury Plaza Hotel Mt. Vernon
Super 8 by Wyndham O'Fallon
Super 8 by Wyndham O'Fallon
2 out of 5
1100 Eastgate Dr, O'Fallon, IL
Book a stay at this business-friendly hotel in O'Fallon. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the clean ...
7.6/10 Good! (1,005 reviews)
Diamond in the rough
"This is a diamond in the rough. Now if your done high fluting person you might find more problems. But for the price is amazing beds great, allot of pillows, refrigerator in room. There is a washer and be dryer on site. And the outdoor pool looked amazing.. just still to cold to partake, there was ..."

Reviewed on May 21, 2025

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Super 8 by Wyndham O'Fallon
Quality Inn & Suites near St. Louis and I-255
Quality Inn & Suites near St. Louis and I-255
2.5 out of 5
1607 Pontiac Dr, East St. Louis, IL
Book a stay at this business-friendly hotel in East St. Louis. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the ...
7.4/10 Good! (999 reviews)
"It was very clean and quiet. The beds were very comfortable. I would definitely recommend staying there again."

Reviewed on May 14, 2025

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Quality Inn & Suites near St. Louis and I-255
Drury Inn & Suites St. Louis O'Fallon, IL
Drury Inn & Suites St. Louis O'Fallon, IL
3 out of 5
1118 Central Park Drive, O'Fallon, IL
Stay at this 3-star business-friendly hotel in O'Fallon. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the helpful staff ...
9.4/10 Exceptional! (1,000 reviews)
"I will be coming back the rooms are nice I love the breakfast"

Reviewed on May 19, 2025

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Drury Inn & Suites St. Louis O'Fallon, IL
Red Lion Inn & Suites Pontoon Beach
Red Lion Inn & Suites Pontoon Beach
2.5 out of 5
1240 E Chain Of Rocks Rd, Granite City, IL
Stay at this hotel in Granite City. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff in our reviews. Popular attractions ...
7.8/10 Good! (359 reviews)
"Would definitely stay there again"

Reviewed on May 20, 2025

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Red Lion Inn & Suites Pontoon Beach
Walker's Bluff Casino Resort
Walker's Bluff Casino Resort
4.5 out of 5
777 Walkers Bluff Way, Carterville, IL
Stay at this 4.5-star luxury resort in Carterville. Enjoy free WiFi, free parking, and an outdoor pool. Our guests praise the helpful staff and the clean rooms ...
9.2/10 Wonderful! (327 reviews)
"Excellent hotel on beautiful property. Took an early morning walk past the vineyard and winery, and around the lake…gorgeous! Never went to the casino"

Reviewed on May 22, 2025

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Walker's Bluff Casino Resort
Drury Inn & Suites Marion
Drury Inn & Suites Marion
3 out of 5
2706 W DeYoung St, Marion, IL
Stay at this 3-star business-friendly hotel in Marion. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the helpful staff ...
9.2/10 Wonderful! (1,001 reviews)
Nice stop after long day!
"We arrived late after a long day of travel. Free drinks but it ended 10 minutes after we walked in! Lots of walkable restaurants!"

Reviewed on May 20, 2025

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Drury Inn & Suites Marion
Drury Inn & Suites St. Louis Fairview Heights
Drury Inn & Suites St. Louis Fairview Heights
3 out of 5
12 Ludwig Dr, Fairview Heights, IL
Book a stay at this business-friendly hotel in Fairview Heights. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the helpful ...
9/10 Wonderful! (1,001 reviews)
Super staff
"The Inn was great and the staff...even better. Had not stayed at a Drury for quite a while but will definitely look for them in the future."

Reviewed on May 22, 2025

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Drury Inn & Suites St. Louis Fairview Heights
See all 656 properties in Southwest Illinois
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.