Cheap flights To Southern Illinois (STL) from $23

Earn rewards on top of your airline miles with Orbitz Rewards

Many airlines offer flexible change policies

Sign up to receive text alerts about your trip

Cheap Flights to Southern Illinois from $23 One Way, $46 Round Trip

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

Thu, Oct 8 - Thu, Oct 15
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$46 Roundtrip, found 1 hour ago
$46
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, Oct 8 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Thu, Oct 15, priced at $46 found 1 hour ago
Thu, Oct 15 - Sun, Oct 18
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$51 Roundtrip, found 1 hour ago
$51
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, Oct 15 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sun, Oct 18, priced at $51 found 1 hour ago
Fri, Sep 11 - Mon, Sep 14
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$52 Roundtrip, found 7 hours ago
$52
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Fri, Sep 11 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Mon, Sep 14, priced at $52 found 7 hours ago
Fri, Oct 23 - Sun, Oct 25
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$56 Roundtrip, found 21 hours ago
$56
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Fri, Oct 23 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sun, Oct 25, priced at $56 found 21 hours ago
Thu, Sep 3 - Mon, Sep 7
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$61 Roundtrip, found 13 hours ago
$61
Roundtrip
found 13 hours ago
Select Frontier Airlines flight, departing Thu, Sep 3 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Mon, Sep 7, priced at $61 found 13 hours ago
Fri, Sep 4 - Mon, Sep 7
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$62 Roundtrip, found 1 hour ago
$62
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Sep 4 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Mon, Sep 7, priced at $62 found 1 hour ago
Thu, Sep 3 - Sun, Sep 6
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$66 Roundtrip, found 7 hours ago
$66
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Thu, Sep 3 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sun, Sep 6, priced at $66 found 7 hours ago
Wed, Sep 9 - Fri, Sep 11
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$67 Roundtrip, found 4 days ago
$67
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Wed, Sep 9 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Fri, Sep 11, priced at $67 found 4 days ago
Thu, Oct 8 - Sat, Oct 10
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$72 Roundtrip, found 21 hours ago
$72
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Thu, Oct 8 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sat, Oct 10, priced at $72 found 21 hours ago
Tue, Oct 13 - Fri, Oct 16
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$88 Roundtrip, found 5 days ago
$88
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Tue, Oct 13 from Denver Intl. to Lambert-St. Louis Intl., returning Fri, Oct 16, priced at $88 found 5 days ago

Southern Illinois Flight Information

Traveling To
Southern Illinois
Destination Airport IATA Code
STL
Number of Airlines Serving
Airlines
Frontier Airlines, Southwest Airlines, United, Delta, American Airlines
Flight Price
$46
Earliest Departing Flight
Latest Departing Flight

Book Your Flight & Hotel Together & Save

Southern Illinois economy flight packages

Price found within the past 48 hours. Click for updated prices.
The Knight Center at Washington University
2.5-star property

The Knight Center at Washington University

Sep 9 - Sep 12

3 night stay

Denver (DEN) to St. Louis (STL)

Southwest Airlines • Coach

St. Louis (STL) to Denver (DEN)

Frontier Airlines • Coach
Price was $515, price is now $405 per person
$405
per person
found 22 hours ago
The Cheshire
4.0-star property

The Cheshire

Sep 9 - Sep 12

3 night stay

Denver (DEN) to St. Louis (STL)

Southwest Airlines • Coach

St. Louis (STL) to Denver (DEN)

Frontier Airlines • Coach
Price was $564, price is now $417 per person
$417
per person
found 22 hours ago
Moonrise Hotel
4.0-star property

Moonrise Hotel

Sep 9 - Sep 12

3 night stay

Denver (DEN) to St. Louis (STL)

Southwest Airlines • Coach

St. Louis (STL) to Denver (DEN)

Frontier Airlines • Coach
Price was $554, price is now $425 per person
$425
per person
found 22 hours ago
Don't see what you're looking for?
See all available trips from Denver to Southern Illinois
View all trips

Southern Illinois

Save money on your flights to Southern Illinois as well as on hotel and car packages.

 

Free Fees

Snap up cheap Southern Illinois flights at Orbitz, and pay no booking fees. We also don’t charge fees when your plans change or are cancelled. While you’re there, check out our low fare deals on flights to other locations besides flights to Southern Illinois.

Everyday Is a Great Day to Save Even More

Get bonus points from Orbitz, the best discount travel planner in the business. Use your Orbitz Visa to take advantage of sales on Southern Illinois flights, or pile on points by using it for gas, groceries, and other everyday goods and services. Pack your wallet with even more savings using our cutting-edge suite of mobile tools.

Mix and Match

At Orbitz, we turned a great idea from the world of fashion into another way for you to save money. When you shop our low cost tickets on flights to any destination, don’t be afraid to mix and match different airlines for maximum savings on your Southern Illinois flights air ticket. Save more on air travel every day in every way at Orbitz.

Frequently asked questions

What is the best airport to fly to in Southern Illinois?
Touch down at Williamson County Regional Airport (MWA), the main entry point to Southern Illinois. Organizing your flight to this region doesn't get much easier.
How much is a flight to Southern Illinois?
Return flight prices dipped as low as $46 this past week to Southern Illinois, and rose to a high of $142. A few lucky travelers flying out of Atlanta (ATL) managed to bag one-way tickets from just $23.
How to book the cheapest flight to Southern Illinois?
With some of the most affordable flight deals around, you can jet for less with Orbitz. The following handy hints will help you find cheap flights to Southern Illinois — and leave you with more money to play with:

  • Departing from or arriving at nearby airports can sometimes help you save on airfares. Type in your preferred departure and arrival points. Next, select the 'Nearby airports' function below the form fields to compare your options.
  • If your travel plans aren't written in stone, click on the 'Show flexible dates' link to see the flight deals for different departure dates. Go with any suitable cheaper fare that pops up.
  • To optimize your results, hit 'Show options.' You can search based on seating class, airlines, nonstop flights and refundable flights. You can also choose your preferred departure and arrival times under 'Sort & Filter' to the left.
  • Once you know your travel dates, lock in your flight. Ticket prices generally get more expensive as the departure date nears.
  • Combine your hotels, flights and car rentals into an impressive package deal. Save your cash for things you're really excited about, like discovering every corner of Southern Illinois.
  • Flying during peak season means higher airfares. Try to vacation outside of popular periods, such as school breaks, Thanksgiving and Easter.

What is the best time to book a flight to Southern Illinois?
Generally speaking, the cheapest month to purchase your airfare is January. This is closely followed by February and August. When seeking a cheap flight to Southern Illinois, make sure you're ready to book. Cheap deals appear quickly and don't hang around!
What day of the week is the cheapest to book a flight to Southern Illinois?
In general, Tuesdays, Wednesdays and Saturdays are the cheapest days of the week to book a flight to Southern Illinois. If you're after unbeatable airfares, search across those days and you just might find an incredible flight deal.
What is the cheapest day of the week to fly to Southern Illinois?
According to Orbitz data from 2020, Monday is generally the best day of the week for cheap flights to Southern Illinois. Tuesday also has wallet-friendly fares, whereas Saturday has the most expensive ticket rates. Even though leaving at the weekend is often more convenient, you'll have more cash to play with if you head out at the start of the week.
What is the cheapest month to fly to Southern Illinois?
Based on Orbitz data, it's best to fly out in August. This is generally a great month to pick up cheap flights to Southern Illinois. It's worth noting that the most expensive time to depart is during the month of June.
Which airlines allow free cancellation?
Flexible travel is more important than ever, that's why Orbitz lets you search for carriers that won't penalize you for any amendments. Fill out your departure and arrival points, then select "Filter by flexible change policies." We'll show you all the options that include free cancellation and no change fees.
What do I need for the flight to Southern Illinois?
The trick to a comfortable and stress-free flight is being well prepared. Listed below are some of our top tips that'll help get you ready for your journey:

  • Whether you print it out at home or use an electronic one, you'll need your boarding pass to walk on to the plane. You'll also need some type of government-issued photo ID. If you're traveling internationally, make sure your passport is valid.
  • Make time fly by even faster on your short hop by packing the right gear. Think a water bottle, snacks and entertainment. If you want your trip to Southern Illinois to pass nice and peacefully, put some headphones in your bag as well.
  • It can get very cool on the plane. If you don't like the thought of shivering your way through the flight, wear an extra layer of clothes.

How many direct flights are there to Southern Illinois?
Head to Southern Illinois quickly on one of the 13 direct flights that touch down here every month. For a comfortable and stress-free trip, have a look at the nonstop flights with Cape Air.
How do I get cheap first-class/business deals to Southern Illinois?
Experienced travelers have mastered the art of finding business or first-class flights to Southern Illinois that don't cost a packet. Follow their example with these helpful hints:

  • Be flexible with your travel dates and hold out for huge sales on business or first-class airfares.
  • Many low-cost carriers offer comfortable business or premium-class seating that doesn't cost an arm and a leg.
  • Make a bid for an upgrade. Some airlines hold online auctions that let you put down a price for a seat up the front. You may also be able to upgrade with points earned through a rewards program.

What is the best time to go to Southern Illinois?
People come from all over the place to go to Southern Illinois in June, July and August. So if you want to explore this amazing destination in the busy season, this is the time to go. As with many places in the Northern Hemisphere, the summer starts June 20 in Southern Illinois, with average daily temperatures ranging between 65 ºF and 80 ºF.

More to Explore

Fare, taxes & fees: Fares include all taxes and fees, except baggage fees. Rates shown reflect fares found by other Orbitz users over the past 7 days. Due to rapidly changing airline prices & seat availability, these fares may no longer be available.

Refunds/changes/cancellations: Itinerary changes, if permitted for the fare, will have a $30 service fee charged by Orbitz. Additional airline charges may apply.

Other conditions: Schedules, fares and rules are subject to change without notice. Seats are limited and may not be available on all flights/dates or in all markets. Lower fares may be available. Fares will not be honored retroactively or in exchange for any wholly/partially unused ticket. Tickets are non-transferable and non-refundable. Fare rules are provided for the selected itinerary before booking.