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Southern Illinois

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Southern Illinois Flights as Low as $70

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

Frontier Airlines
Tue, May 19 - Wed, May 27
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$70 Roundtrip, found 4 hours ago
$70
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Tue, May 19 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, May 27, priced at $70 found 4 hours ago
Frontier Airlines
Mon, May 18 - Sat, May 23
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$80 Roundtrip, found 6 hours ago
$80
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Mon, May 18 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sat, May 23, priced at $80 found 6 hours ago
Frontier Airlines
Tue, May 26 - Wed, Jun 3
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$93 Roundtrip, found 19 hours ago
$93
Roundtrip
found 19 hours ago
Select Frontier Airlines flight, departing Tue, May 26 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Jun 3, priced at $93 found 19 hours ago
Frontier Airlines
Tue, May 26 - Wed, Jun 10
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$97 Roundtrip, found 2 days ago
$97
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Tue, May 26 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Jun 10, priced at $97 found 2 days ago
Frontier Airlines
Tue, May 19 - Wed, Jun 3
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$103 Roundtrip, found 2 days ago
$103
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Tue, May 19 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Jun 3, priced at $103 found 2 days ago
Frontier Airlines
Tue, May 19 - Wed, May 27
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$107 Roundtrip, found 4 hours ago
$107
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Tue, May 19 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, May 27, priced at $107 found 4 hours ago
Frontier Airlines
Wed, May 20 - Mon, Jun 1
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$120 Roundtrip, found 2 days ago
$120
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, May 20 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Mon, Jun 1, priced at $120 found 2 days ago
Frontier Airlines
Sat, May 16 - Fri, May 29
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$122 Roundtrip, found 6 days ago
$122
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Sat, May 16 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Fri, May 29, priced at $122 found 6 days ago
Frontier Airlines
Tue, May 26 - Thu, Jun 11
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$124 Roundtrip, found 5 days ago
$124
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Tue, May 26 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Thu, Jun 11, priced at $124 found 5 days ago
Frontier Airlines
Sat, May 9 - Fri, May 15
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$158 Roundtrip, found 3 hours ago
$158
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Sat, May 9 from Denver Intl. to Lambert-St. Louis Intl., returning Fri, May 15, priced at $158 found 3 hours ago
Delta
Wed, Aug 12 - Tue, Aug 25
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$177 Roundtrip, found 1 hour ago
$177
Roundtrip
found 1 hour ago
Select Delta flight, departing Wed, Aug 12 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Tue, Aug 25, priced at $177 found 1 hour ago
United
Wed, Aug 12 - Tue, Aug 25
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$197 Roundtrip, found 1 hour ago
$197
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Aug 12 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Tue, Aug 25, priced at $197 found 1 hour ago
American Airlines
Wed, Aug 12 - Tue, Aug 25
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$197 Roundtrip, found 1 hour ago
$197
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Wed, Aug 12 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Tue, Aug 25, priced at $197 found 1 hour ago
United
Thu, Jun 11 - Tue, Jun 16
ATL
Hartsfield-Jackson Atlanta Intl.
PAH
Barkley Regional
$294 Roundtrip, just found
$294
Roundtrip
just found
Select United flight, departing Thu, Jun 11 from Hartsfield-Jackson Atlanta Intl. to Barkley Regional, returning Tue, Jun 16, priced at $294 just found
American Airlines
Wed, May 20 - Tue, Jun 9
DEN
Denver Intl.
EVV
Evansville Regional
$478 Roundtrip, found 4 days ago
$478
Roundtrip
found 4 days ago
Select American Airlines flight, departing Wed, May 20 from Denver Intl. to Evansville Regional, returning Tue, Jun 9, priced at $478 found 4 days ago
Alaska Airlines
Sat, May 16 - Sat, May 16
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$575 Roundtrip, found 3 days ago
$575
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, May 16 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, May 16, priced at $575 found 3 days ago

Cheap Flights to Southern Illinois

Fall in love at first flight with your vacation to Southern 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 Southern Illinois on Hotwire, and you’ll be up, up, and on a getaway in no time.

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

Frequently Asked Questions About flights to Southern Illinois

Don’t waste your time on endless searches for cheap airline tickets oneway or roundtrip. We’ll have you on your way to Southern 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 Southern 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 Southern Illinois are in May, but when you book your flight on Hotwire, savings are always in season.

How many airlines fly to Southern 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 Southern Illinois.

What airport is best to fly into Southern Illinois?

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

How much are flights to Southern Illinois?

Got very cheap flights on your vacation itinerary? When you book your airline tickets to Southern Illinois on Hotwire, you may just get what’s on your getaway wish list. With tickets as low as $70, 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 Southern Illinois?

The trick to saving a stack of cash on your flight to Southern 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 $70 right now, why wait?

Southern Illinois Flight Information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Roundtrip price
$70

Last Minute Hotel Deals in Southern Illinois

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 ...
9.2/10 Wonderful! (1,003 reviews)
Great hotel everything was perfect

Reviewed on Apr 25, 2026

Get rates
Drury Inn & Suites St. Louis Fairview Heights
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 ...
6.8/10 (1,003 reviews)
Very dirty, insects crawling around. Lights did not work in room.

Reviewed on Apr 24, 2026

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Super 8 by Wyndham O'Fallon
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
Book a stay at this business-friendly hotel in O'Fallon. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the helpful staff ...
9.6/10 Exceptional! (1,003 reviews)
Clean room and bathroom. Excellent customer service. Wonderful breakfast and dinner. Nice and well maintained pool facilities. Recommend 10/10.

Reviewed on Apr 22, 2026

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Drury Inn & Suites St. Louis O'Fallon, IL
Drury Plaza Hotel Mt. Vernon

Drury Plaza Hotel Mt. Vernon

3 out of 5
145 North 44th Street  Mount Vernon IL
Book a stay at this 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! (1,681 reviews)
W

Reviewed on Apr 25, 2026

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Drury Plaza Hotel Mt. Vernon
Super 8 by Wyndham Troy IL/St. Louis Area

Super 8 by Wyndham Troy IL/St. Louis Area

2 out of 5
910 Edwardsville Rd Troy IL
Book a stay at this business-friendly hotel in Troy. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the clean rooms ...
8/10 Very Good! (1,002 reviews)
The room was excellent

Reviewed on Apr 23, 2026

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Super 8 by Wyndham Troy IL/St. Louis Area
Quality Inn O'Fallon IL - St. Louis

Quality Inn O'Fallon IL - St. Louis

3 out of 5
1409 W US 50 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 ...
7.4/10 Good! (1,002 reviews)
Good location easy to check in and out

Reviewed on Apr 26, 2026

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Quality Inn O'Fallon IL - St. Louis
Comfort Suites Mount Vernon

Comfort Suites Mount Vernon

2.5 out of 5
404 South 44th Street Mount Vernon IL
Book a stay at this business-friendly hotel in Mount Vernon. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the helpful ...
9/10 Wonderful! (1,038 reviews)
Excellent breakfast!

Reviewed on Apr 24, 2026

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Comfort Suites Mount Vernon
Baymont by Wyndham Effingham

Baymont by Wyndham Effingham

2.5 out of 5
1811 W Fayette Avenue Effingham IL
Book a stay at this business-friendly hotel in Effingham. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the clean ...
8.2/10 Very Good! (1,010 reviews)
Very convenient to 57/70

Reviewed on Apr 26, 2026

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Baymont by Wyndham Effingham
See all 1,171 properties in Southern 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.