Cheap Flights To Southwest Illinois 2026

Southwest Illinois Flights as Low as $128

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Delta
Mon, Nov 23 - Fri, Nov 27
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$175
Roundtrip
found 12 hours ago
Select Delta flight, departing Mon, Nov 23 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Fri, Nov 27, priced at $175 found 12 hours ago
American Airlines
Frontier Airlines
Southwest Airlines
Southwest Airlines
Frontier Airlines
Frontier Airlines
Southwest Airlines
Southwest Airlines
Southwest Airlines
American Airlines
Frontier Airlines
Delta
Thu, Nov 26 - Thu, Dec 3
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$237
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Nov 26 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Thu, Dec 3, priced at $237 found 1 day ago
Delta
Tue, Nov 10 - Sat, Nov 14
JFK
John F. Kennedy Intl.
STL
Lambert-St. Louis Intl.
$265
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Nov 10 from John F. Kennedy Intl. to Lambert-St. Louis Intl., returning Sat, Nov 14, priced at $265 found 1 day ago
United

Flights to Southwest Illinois

If a trip to Southwest Illinois is calling your name, then book your next flight to (airport). And with the AARP Travel Center Powered by Expedia®, you are taken care of. AARP Travel features their members-only discount with the best rates from Expedia, so members get the best price in travel, guaranteed. AARP members pay no booking fees on flights, and often receive exclusive rates on hotels and car rentals.

Once you have entered your departure point and destination, we will show you a full list of deals for your route. Do not forget to look at flights to alternative airports nearby, which can help you get a lower fare.

Transportation at the Airport

Once you have got your flight scheduled to Southwest Illinois, you may want to book a car so you can get around on your own. You can request Southwest Illinois car rentals under our cars tab and get in the car as soon as you step outside. If you don't need a rental car, there are other ground transportation options such as ride hailing applications, shuttle, limousine, and taxi services.

Things to Do in Southwest Illinois

If you aren't sure where to start, we can help you with that as well. Not to worry—there's so many things to do in this city. Southwest Illinois has so much to do, and we can help you get started.

If you're looking for some fun activities to do in Southwest Illinois, make sure you check out our "Things to Do in Southwest Illinois" page for excursions and activities for the whole family.

Book Your Hotel in Southwest Illinois

Southwest Illinois has hotel to choose from, make sure you check out our hotel listings tab for some great recommendations from past visitors. No matter where you stay, just remember that you'll get the best for your trip when you book your stay with us.

Book Your Southwest Illinois Trip to Southwest Illinois

Once you've planned your travel dates, allow us here at AARP Travel to connect you with inexpensive tickets to Southwest Illinois. Do not wait a moment longer—book your airfare today and land in Southwest Illinois tomorrow.