$21 Cheap Flights to St. Clair , MO

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How much is the cheapest flight to St. Clair?

Prices were available within the past 7 days and start at $21 for one-way flights and $41 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, May 28 - Wed, May 29
CMH
John Glenn Columbus Intl.
STL
Lambert-St. Louis Intl.
$110 Roundtrip, found 16 hours ago
$110
Roundtrip
found 16 hours ago
Select Frontier Airlines flight, departing Tue, May 28 from John Glenn Columbus Intl. to Lambert-St. Louis Intl., returning Wed, May 29, priced at $110 found 16 hours ago
Frontier Airlines
Sun, May 19 - Wed, May 29
CMH
John Glenn Columbus Intl.
STL
Lambert-St. Louis Intl.
$119 Roundtrip, found 5 days ago
$119
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sun, May 19 from John Glenn Columbus Intl. to Lambert-St. Louis Intl., returning Wed, May 29, priced at $119 found 5 days ago
Frontier Airlines
Sun, Jun 2 - Wed, Jun 12
CMH
John Glenn Columbus Intl.
STL
Lambert-St. Louis Intl.
$128 Roundtrip, found 1 day ago
$128
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sun, Jun 2 from John Glenn Columbus Intl. to Lambert-St. Louis Intl., returning Wed, Jun 12, priced at $128 found 1 day ago
Frontier Airlines
Thu, Jun 13 - Sat, Jun 15
CMH
John Glenn Columbus Intl.
STL
Lambert-St. Louis Intl.
$133 Roundtrip, found 2 days ago
$133
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Jun 13 from John Glenn Columbus Intl. to Lambert-St. Louis Intl., returning Sat, Jun 15, priced at $133 found 2 days ago
Frontier Airlines
Thu, May 16 - Wed, May 22
CMH
John Glenn Columbus Intl.
STL
Lambert-St. Louis Intl.
$134 Roundtrip, found 3 days ago
$134
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Thu, May 16 from John Glenn Columbus Intl. to Lambert-St. Louis Intl., returning Wed, May 22, priced at $134 found 3 days ago

Find Your Flights to St. Clair STL

Cheap flights to St. Clair (STL)

Get started finding a cheap flight to St. Clair on Expedia by either choosing a deal on this page or entering into the search bar your travel dates, origin airport, and whether you want roundtrip or one-way airfare. You can filter for flexibility, number of stops, airline, and departure/arrival times to find the best flight for you.

We recommend using the ‘Flexible Dates’ calendar at the top of the page to see the price of plane tickets on the surrounding dates. This allows you to pick the cheapest days to fly if your trip allows flexibility and score cheap flight deals to St. Clair.

Roundtrip prices range from $41 - $134, and one-ways to St. Clair start as low as $21.

Be aware that choosing a non-stop flight can sometimes be more expensive while saving you time. And routes with connections may be available at a cheaper rate.

Airlines that fly to St. Clair (STL)

You have several options for which airline you choose to travel with to St. Clair. There are 10 airlines flying into STL: Frontier Airlines. 

Cheap plane tickets may be available from different airlines at different times and with unique terms. It’s best to understand the details of each airline’s offer before judging its value.

For example, if you plan to check a bag or bring a carry-on, check whether the cheap airfare deal includes a baggage allowance. If not, verify whether the baggage fee is higher than the difference of other airline plane ticket deals offering free checked/carry-on baggage in exchange for a slightly higher airfare. 

Additionally, your preferred frequent flyer membership programs may influence your choice of cheap airline. Expedia allows you to enter your membership numbers during checkout to earn points from your airline and Expedia Rewards—all while getting a great deal and planning all your travel in one online platform.

Find the best deals

At Expedia, we source many flight deals from multiple providers, so you can easily find the best deals that are right for you. A great strategy for getting the best deals can be to make sure you book and travel at the optimal times. Airfare to St. Clair (STL) varies throughout the year based on seasonal demand. You’ll see the lowest rates for roundtrips to STL in May and in May for one-ways.

Cancellation & flexibility

To change or cancel eligible flights, go to ‘My Trips’ and navigate to your itinerary. If you booked within the last 24-hours, you might be able to cancel your flight for free. Learn more about flight changes or cancellations from our customer service portal. Some plane tickets are available with no change fees, which you can filter for during your search.

Frequently asked questions

How do I find cheap flights to St. Clair that have flexible change policies?
We know that plans can change in a flash, so choosing a flexible airfare with Expedia makes good sense. Tick the “No change fee” box underneath the “Flexible change policies” filter. Your low-cost, flexible flight to St. Clair is only a few clicks away.
How can I book the cheapest flight to St. Clair?
To boost your odds of booking the cheapest flight, enter your travel details into the search fields, then filter the results by your preferred airlines, departure/arrival times and number of stops. Also compare the prices of flying into and out of other airports if that’s an option for you. Timing plays a big part in scoring a bargain — book domestic flights at least four weeks out and international flights around six months in advance to save an average of 10%. And if you see a good deal, snap it up! One of the cheapest fares to St. Clair currently is $21, departing Orlando in May. Wherever you’ll be flying in from, Expedia will help send you to St. Clair for the best price possible.
Which day of the week is the best day to buy a plane ticket to St. Clair?
Based on our research, Sundays are the best day to buy plane tickets. Airfares do fluctuate with demand though, so it’s wise to check prices regularly. Want another tip? Start browsing flights to St. Clair as soon as you’ve chosen your travel dates and be ready to book when you spot a bargain. The optimal booking window runs from 21 days to about 45 days out from takeoff, so the earlier you begin looking, the greater the odds of scoring a deal! Savings are subject to change and may vary depending on selections made.
What airport is best to fly into St. Clair?
With one main airport operating in St. Clair, it won’t take you too long to find the best flight. You’ll be taking off to STL, which is located around 70 mi from the downtown area.
Which airlines fly to St. Clair?
From takeoff to touchdown, you can look forward to a comfortable flight with American Airlines. One of 9 airlines that connects St. Clair with 60 airports around the world, it operates the greatest number of services between Chicago and St. Clair. United Airlines is another popular choice with travelers.
How many nonstop flights are there to St. Clair?
With around 1,273 nonstop flights running each week, you’ll be hitting the tarmac in St. Clair before you can ask, “Are we there yet?”
Where are the most popular flights to St. Clair departing from?
The most popular flights to St. Clair depart from Chicago, Denver and Dallas airports.
Do you have any tips for my flight to St. Clair?

  • Wherever your journey is taking you, flying can be a pleasant experience if you come well prepared. First, pack your travel documents, passport and medications. Next, toss in a little extra in-flight entertainment to help the time fly by. A juicy book and a tablet filled with the latest movies are good choices. If you’re hoping to catch some z’s, a memory-foam neck pillow and earplugs will also come in handy.
  • Don’t forget there’s also a list of prohibited items for your hand luggage which can differ between carriers and flight routes. As a general rule, avoid packing anything explosive, flammable or sharp. This includes things like pocket knives, razor blades, aerosol cans and flares. Sporting equipment like baseball bats, and objects that could harm passengers, such as swords and batons, are also banned from the cabin.

What to wear on a flight:

  • The aisles of a plane aren’t designed to be a catwalk. Layer up with comfortable, loose-fitting clothing and bring a sweater as it can get cool in the cabin on long-haul flights. Sneakers or other closed-toe shoes are ideal for longer journeys.
  • Lessen your risk of developing deep vein thrombosis (DVT), a blood clotting condition which can be caused by sitting for lengthy periods, by regularly walking around the cabin. Otherwise, do foot and leg exercises in your seat. If you’re at higher risk of developing DVT, think about wearing compression socks.

How can I get a cheap last-minute flight to St. Clair?
Scoring a cheap, spur-of-the-moment flight to St. Clair is as easy as having some flexibility with your travel plans. Have some leeway when it comes to your travel dates, flight times and choice of carrier. If your destination has a few airports to choose from, compare the prices of flying into each of them for the best deal on your ticket.
Where can I learn more about changing or canceling my flight to St. Clair?
Most flights are free to cancel within 24 hours of making the reservation. However, some flights are non-refundable, and you may receive a flight credit from the airline to use for a future booking. For more information, please visit our Customer Service Portal.
Flights to St. Clair information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, United
Roundtrip price
$110
Popular airline
Alaska Airlines

Trending flights to St. Clair

Prices were available within the past 7 days and start at $21 for one-way flights and $41 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
Sat, May 18 - Tue, May 21
MCO
Orlando Intl.
STL
Lambert-St. Louis Intl.
$41 Roundtrip, found 1 hour ago
$41
Roundtrip
found 1 hour ago
Select Spirit Airlines flight, departing Sat, May 18 from Orlando Intl. to Lambert-St. Louis Intl., returning Tue, May 21, priced at $41 found 1 hour ago
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