$50 Cheap Flights to St. Clair, MO

View $50 flight on Sat, Oct 18, 2025Opens in a new window

Popular airlines to St. Clair

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How much is the cheapest flight to St. Clair?

Prices were available within the past 7 days and start at $50 for one-way flights and $83 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Aug 16 - Sat, Aug 23
ATL
Atlanta
STL
St. Louis
$98 Roundtrip, just found
$98
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Aug 16 from Atlanta to St. Louis, returning Sat, Aug 23, priced at $98 just found
Spirit Airlines
Wed, Aug 6 - Sat, Aug 9
MCO
Orlando
STL
St. Louis
$106 Roundtrip, found 2 hours ago
$106
Roundtrip
found 2 hours ago
Select Spirit Airlines flight, departing Wed, Aug 6 from Orlando to St. Louis, returning Sat, Aug 9, priced at $106 found 2 hours ago
United
Wed, Sep 17 - Sat, Sep 20
IAH
Houston
STL
St. Louis
$130 Roundtrip, found 3 days ago
$130
Roundtrip
found 3 days ago
Select United flight, departing Wed, Sep 17 from Houston to St. Louis, returning Sat, Sep 20, priced at $130 found 3 days ago
Delta
Wed, Oct 22 - Sun, Oct 26
JFK
New York
STL
St. Louis
$158 Roundtrip, found 2 days ago
$158
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Oct 22 from New York to St. Louis, returning Sun, Oct 26, priced at $158 found 2 days ago
American Airlines
Wed, Sep 10 - Wed, Sep 24
SEA
Seattle
STL
St. Louis
$159 Roundtrip, found 1 day ago
$159
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Sep 10 from Seattle to St. Louis, returning Wed, Sep 24, priced at $159 found 1 day ago

Find the cheapest month to fly from Columbus (CMH) to St. Louis (STL)

August is typically the cheapest month to fly

From $144 - $691 per traveler.

Graph displaying average flight prices per month

Tips to find the cheapest flights to St. Clair

The cheapest day to fly

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.

The cheapest month to fly

August is the cheapest month to fly to St. Clair. This coincides with the low season when fewer people travel. Whichever month you travel in, though, be sure to book at least a month in advance if you want to score cheap tickets to St. Clair. ARC's data shows that domestic flights booked 28 days or more before departure are typically 24% cheaper than those booked last minute.

The most affordable time to book a flight

Typically, a Sunday can be the cheapest time to book a flight to St. Clair, according to ARC’s data. On average, you could save between 6% and 13% by booking on a Sunday instead of a Friday, which is the most expensive day to make a reservation.

The cheapest round-trip tickets to St. Clair

The lowest price for round-trip flights to St. Clair in 2025 starts from from $83, while one-way tickets start from from $50. Expedia's effective search tool is one of the best ways to find a budget airfare. Simply enter your dates, and within seconds, it'll show you a vast selection of the cheapest flights to St. Clair. If you have a preferred departure time or airline, you can use the handy filters to customize your search.

The cheapest airlines flying to St. Clair

Spirit Airlines, United, Southwest Airlines, American Airlines, Frontier Airlines, Delta are just some of the airlines that can typically offer cheap tickets to St. Clair. You can find their most affordable flights by using the “airline” search filter and then sorting prices from low to high. As a trusted partner of the world's leading airlines, Expedia offers you some of the best airfare deals to St. Clair and countless more destinations worldwide.

The most affordable airports to fly into

To view the cheapest airports to fly into for St. Clair, simply order your search results from lowest to highest price. Expedia's search tool compares flight prices for all airports close to your destination, so you don't have to manually search them one by one to find the cheapest flight to St. Clair. If you have a preferred place to fly into, take advantage of the “arrival airport” filter to narrow down your search on Expedia.

Save with a package

With Expedia's amazing package deals, you could save hundreds of dollars by booking your St. Clair plane tickets together with your accommodations, car rental, or activities. Just select the search wizard's “package” option to view some of the cheapest deals. Look out for the green savings label to see how much you're saving.

Date flexibility for the cheapest flights to St. Clair

If you can be flexible with your travel dates, it's a good idea to broaden your search by comparing prices on different days. This will open up more options, meaning you could uncover a less expensive flight to St. Clair.

Stopover savings

The cheapest tickets to St. Clair are sometimes those with a stopover. Book one of these flights, and you'll change planes at an airport en route to St. Clair. While the overall travel time might be longer than a non-stop flight, you may decide it's worth it for the money saved.

Get Expedia's Price Drop Protection

Price Drop Protection means that if your flight gets cheaper after booking, you'll be credited the difference*. This gives you peace of mind that you're getting one of the cheapest flights to St. Clair for your chosen departure. Expedia's Price Drop Protection is available for a small fee but is free to One Key Gold and Platinum tier members.

*Terms apply.

Use our Price Tracking feature

Expedia's Price Tracking feature is another great tool that removes the guesswork from finding cheap flights to St. Clair. Simply download the free Expedia app to your smart device and activate St. Clair flight price alerts for your travel dates. There's even a price predictor tool that uses historical data to indicate the best time to book, giving you peace of mind that you'll nab the lowest prices.

Book with Expedia

As well as Price Drop Protection and Price Tracking, Expedia's close partnership with a vast selection of the world's leading airlines means you're sure to find cheap flights to St. Clair. Plus, the One Key rewards program lets you earn real cash rewards on most bookings that you can use to save money on future trips. Best of all, it's free to join, and members often unlock exclusive discounts, too.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

What month is the cheapest to fly to St. Clair?
Flights to St. Clair are usually the cheapest in October *. You could land a good deal for fares during this time if you keep your eyes peeled. *Cheapest month to fly is based on the month with the cheapest flight found on Expedia.com in the next 330 days.
Which US cities have the cheapest flights to St. Clair?
Chicago, Dallas and Denver generally offer cheap flights to St. Clair. Keep in mind that fares may vary based on factors like demand, number of stopovers and time of year.
Which US cities fly direct to St. Clair?
There are 55 US destinations that you can fly to St. Clair directly from. Explore the options by selecting the "Direct flights only" filter on Expedia and pick the ideal departure point for you. Here are a handful of the major cities to head out from:

  • Chicago
  • Dallas
  • Denver
  • New York
  • Atlanta

How to find a cheap flight to St. Clair?
Book in advance or search for cheap flights to St. Clair during the off-season, such as January and February. Flying off on a Thursday can also save you 16% on average compared to a Sunday departure.* The Expedia app makes it even easier to know when to book. Just turn on the toggle for "Watch prices" and you'll receive a notification when fares change.*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
How to get a cheap last-minute flight to St. Clair?
Being flexible about your plans might help you find last-minute offers on cheap flights to St. Clair. To view all the available options, try exploring different ticket types, changing your St. Clair vacation dates, flying out of an alternative airport or using another airline.
How far in advance should I book a flight to St. Clair?
To nab some of the best deals on domestic journeys, book your flight to St. Clair 28 days ahead of your travel dates. For international flights, search for your ticket two to four months in advance. This boosts your chances of locking in your preferred departure times and seats.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
Which day of the week is the cheapest day to buy a plane ticket to St. Clair?
You can save an average of 8% by buying tickets on a Sunday rather than Fridays, which tend to be the priciest day to book.* When it comes to scoring a cheap flight to St. Clair, it's all about having good timing.*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
Which airlines fly to St. Clair?
A total of 10 carriers connect 33 airports across the globe to St. Clair. Here are some of the key airlines to St. Clair, where Lambert-St. Louis Intl. Airport (STL) is the major arrival point:

  • Delta Air Lines
  • American Airlines
  • United Airlines
  • Southern Airways Express

Where do you fly into St. Clair?
If you're flying to St. Clair, the main airport to touch down at is Lambert-St. Louis Intl. Airport (STL). Alternatively, you could fly to St. Clair via Spirit of St. Louis Airport (SUS).
How far is the airport from central St. Clair?
You'll be approximately 45 mi northeast of central St. Clair after touching down at Lambert-St. Louis Intl. Airport (STL).
Can I save money by booking a St. Clair trip package?
Book a St. Clair flight and hotel package deal on Expedia, and you could benefit from significant savings. It's a breeze to bundle your accommodations and flights, and you can also add car rentals and activities to create your own personalized St. Clair trip. Plus, nothing beats the convenience of booking everything in one place.
Can I change or cancel my flight to St. Clair?
It's usually possible to cancel or change your flight to St. Clair. Many airlines let you cancel flights for free within 24 hours of booking. However, some flights are non-refundable, and airlines may issue you credit for future travel instead of a direct refund. To reserve cheap flights to St. Clair with flexible change policies, check the "No cancel fee" or "Changes included" filters when you search. Need more information? Check out 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
Roundtrip price
$82

Trending flights to St. Clair

Prices were available within the past 7 days and start at $50 for one-way flights and $83 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Aug 16 - Sat, Aug 16
ATL
Atlanta
STL
St. Louis
$83 Roundtrip, found 3 days ago
$83
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sat, Aug 16 from Atlanta to St. Louis, returning Sat, Aug 16, priced at $83 found 3 days ago

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*Available to One Key members.