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Southwest Illinois

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Southwest Illinois Flights as Low as $134

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

American Airlines
Tue, Aug 26 - Tue, Aug 26
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$134 Roundtrip, found 11 hours ago
$134
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Tue, Aug 26 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Tue, Aug 26, priced at $134 found 11 hours ago
American Airlines
Tue, Aug 26 - Tue, Aug 26
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$139 Roundtrip, found 11 hours ago
$139
Roundtrip
found 11 hours ago
Select American Airlines flight, departing Tue, Aug 26 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Tue, Aug 26, priced at $139 found 11 hours ago
American Airlines
Thu, Aug 21 - Mon, Aug 25
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$157 Roundtrip, found 10 hours ago
$157
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Thu, Aug 21 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Mon, Aug 25, priced at $157 found 10 hours ago
Frontier Airlines
Thu, Aug 21 - Mon, Aug 25
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$167 Roundtrip, found 10 hours ago
$167
Roundtrip
found 10 hours ago
Select Frontier Airlines flight, departing Thu, Aug 21 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Mon, Aug 25, priced at $167 found 10 hours ago
American Airlines
Thu, Aug 21 - Mon, Aug 25
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$168 Roundtrip, found 10 hours ago
$168
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Thu, Aug 21 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Mon, Aug 25, priced at $168 found 10 hours ago
Frontier Airlines
Thu, Jul 3 - Thu, Jul 10
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$180 Roundtrip, found 2 days ago
$180
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Jul 3 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Thu, Jul 10, priced at $180 found 2 days ago
United
Wed, Aug 27 - Thu, Sep 4
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$180 Roundtrip, found 2 days ago
$180
Roundtrip
found 2 days 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 2 days ago
Delta
Thu, Aug 21 - Mon, Aug 25
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$181 Roundtrip, found 10 hours ago
$181
Roundtrip
found 10 hours ago
Select Delta flight, departing Thu, Aug 21 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Mon, Aug 25, priced at $181 found 10 hours ago
Spirit Airlines
Fri, Jul 25 - Sun, Aug 3
PHL
Philadelphia Intl.
STL
Lambert-St. Louis Intl.
$189 Roundtrip, found 12 hours ago
$189
Roundtrip
found 12 hours ago
Select Spirit Airlines flight, departing Fri, Jul 25 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Sun, Aug 3, priced at $189 found 12 hours ago
Delta
Wed, Aug 27 - Thu, Sep 4
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$189 Roundtrip, found 2 days ago
$189
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Aug 27 from Seattle - Tacoma Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $189 found 2 days ago
Delta
Tue, Aug 26 - Tue, Aug 26
DAL
Love Field
STL
Lambert-St. Louis Intl.
$191 Roundtrip, found 11 hours ago
$191
Roundtrip
found 11 hours ago
Select Delta flight, departing Tue, Aug 26 from Love Field to Lambert-St. Louis Intl., returning Tue, Aug 26, priced at $191 found 11 hours ago
Alaska Airlines
Wed, Aug 27 - Thu, Sep 4
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$249 Roundtrip, found 2 days ago
$249
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Wed, Aug 27 from Seattle - Tacoma Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $249 found 2 days ago
Frontier Airlines
Mon, Oct 20 - Sat, Oct 25
TTN
Mercer
STL
Lambert-St. Louis Intl.
$294 Roundtrip, found 6 days ago
$294
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Mon, Oct 20 from Mercer to Lambert-St. Louis Intl., returning Sat, Oct 25, priced at $294 found 6 days ago
American Airlines
Mon, Aug 18 - Wed, Aug 27
DFW
Dallas-Fort Worth Intl.
PAH
Barkley Regional
$360 Roundtrip, found 3 days ago
$360
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Aug 18 from Dallas-Fort Worth Intl. to Barkley Regional, returning Wed, Aug 27, priced at $360 found 3 days ago
Hawaiian Airlines
Fri, Jun 27 - Sat, Jul 5
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$372 Roundtrip, found 1 day ago
$372
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Fri, Jun 27 from Seattle - Tacoma Intl. to Lambert-St. Louis Intl., returning Sat, Jul 5, priced at $372 found 1 day ago
American Airlines
Tue, Jun 17 - Thu, Jun 26
SEA
Seattle - Tacoma Intl.
PAH
Barkley Regional
$763 Roundtrip, found 3 days ago
$763
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Jun 17 from Seattle - Tacoma Intl. to Barkley Regional, returning Thu, Jun 26, priced at $763 found 3 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 $134, 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 $134 right now, why wait?

Southwest Illinois Flight Information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Roundtrip price
$133

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! (1,343 reviews)
"Clean and quiet hotel. Friendly staff. Three restaurant options close by."

Reviewed on Jun 14, 2025

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Drury Plaza Hotel Mt. Vernon
Best Western Plus Pontoon Beach
Best Western Plus Pontoon Beach
3 out of 5
4 Regency Pkwy, Granite City, IL
Stay at this 3-star business-friendly hotel in Granite City. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff in our reviews. ...
8.4/10 Very Good! (656 reviews)
"Very clean."

Reviewed on Jun 14, 2025

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Best Western Plus Pontoon Beach
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! (1,000 reviews)
"The property was clean and the beds were very comfortable. The rooms were clean. The most unexpected and challenging part was that there is no elevator and we were on the second floor. We weren’t made aware of the lack of an elevator as we were loading up the luggage cart. We had an early departure ..."

Reviewed on Jun 9, 2025

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Super 8 by Wyndham O'Fallon
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! (1,003 reviews)
"Rooms were clean and beds were very comfortable. The breakfasts and complimentary dinners were great and we will definitely stay there again."

Reviewed on Jun 13, 2025

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Drury Inn & Suites St. Louis Fairview Heights
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! (1,003 reviews)
"It was clean and we have fun at the pool."

Reviewed on Jun 11, 2025

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Quality Inn & Suites near St. Louis and I-255
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! (389 reviews)
"Had a great stay here. Room was nice and staff were very friendly. Lots of places to eat within a 15 minute drive and breakfast was very good."

Reviewed on Jun 13, 2025

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Red Lion Inn & Suites Pontoon Beach
Radisson Hotel Fairview Heights - St. Louis
Radisson Hotel Fairview Heights - St. Louis
3 out of 5
319 Fountains Pkwy, Fairview Heights, IL
Stay at this 3-star business-friendly hotel in Fairview Heights. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff in our ...
7.4/10 Good! (444 reviews)
"Good place, comfy beds. Booked 2 rooms, called to ask for conjoined rooms and was told no. Breakfast was small, and no selection. Waffles, eggs, potatoes, sausage."

Reviewed on Jun 9, 2025

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Radisson Hotel Fairview Heights - St. Louis
Days Inn & Suites by Wyndham Caseyville
Days Inn & Suites by Wyndham Caseyville
2.5 out of 5
2423 Old Country Inn Drive, Caseyville, IL
Book a stay at this business-friendly hotel in Caseyville. Enjoy free breakfast, free WiFi, and free parking. Popular attractions Pleasant Ridge Park and Cahokia ...
3.8/10 (221 reviews)
"Pet Friendly"

Reviewed on Jun 9, 2025

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Days Inn & Suites by Wyndham Caseyville
See all 670 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.