$28 Cheap Flights to St. Charles, MO

View $28 flight on Wed, May 27, 2026Opens in a new window

Popular airlines to St. Charles

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How much is the cheapest flight to St. Charles?

Prices were available within the past 7 days and start at $28 for one-way flights and $56 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, Jun 17 - Tue, Jun 23
DEN
Denver
STL
St. Louis
$56 Roundtrip, found 1 hour ago
$56
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Wed, Jun 17 from Denver to St. Louis, returning Tue, Jun 23, priced at $56 found 1 hour ago
United
Tue, May 12 - Wed, May 13
DEN
Denver
STL
St. Louis
$201 Roundtrip, just found
$201
Roundtrip
just found
Select United flight, departing Tue, May 12 from Denver to St. Louis, returning Wed, May 13, priced at $201 just found
Southwest Airlines
Tue, May 12 - Wed, May 13
DEN
Denver
STL
St. Louis
$201 Roundtrip, just found
$201
Roundtrip
just found
Select Southwest Airlines flight, departing Tue, May 12 from Denver to St. Louis, returning Wed, May 13, priced at $201 just found
American Airlines
Sat, May 2 - Sat, May 9
DFW
Dallas
STL
St. Louis
$217 Roundtrip, just found
$217
Roundtrip
just found
Select American Airlines flight, departing Sat, May 2 from Dallas to St. Louis, returning Sat, May 9, priced at $217 just found
Delta
Tue, May 12 - Wed, May 13
DEN
Denver
STL
St. Louis
$221 Roundtrip, just found
$221
Roundtrip
just found
Select Delta flight, departing Tue, May 12 from Denver to St. Louis, returning Wed, May 13, priced at $221 just found

Alternative airports near St. Charles

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $313
STL
Lambert-St. Louis Intl.
CheapestClosest
Average driving time to city center14 min
Flights from $313

Frequently asked questions

What month is the cheapest to fly to St. Charles?
Plan your trip for June if you're looking for a deal on your fare. It's the cheapest month to fly to St. Charles. Try to avoid traveling during peak periods such as public holidays or major events.
Which US cities have the cheapest flights to St. Charles?
Generally, Chicago, Dallas and Denver have cheap flights to St. Charles. However, being flexible is key to bagging the best prices. Plan your getaway midweek or during the low season to keep costs as low as possible.
Which US cities fly direct to St. Charles?
There are 55 US cities where you can fly to St. Charles nonstop from. Compare your options by selecting the "Direct flights only" filter on Expedia and pick the ideal starting point for your trip. Here are a few of the major cities to jet off from:

  • Chicago
  • Dallas
  • Denver
  • New York
  • Atlanta

How to find a cheap flight to St. Charles?
Book in advance or search for a cheap flight to St. Charles during off-peak months like December and January. Flying off on a Thursday can also save you an average of 16% compared to a Sunday flight.* The Expedia app makes it even easier to know the right time to book. Just activate the toggle for "Watch prices" and get notified when fares go down.*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. Charles?
You can find awesome deals on last-minute flights to St. Charles, especially if your travel arrangements aren't set in stone. Consider your options for departing from a different airport, changing your dates or picking another airline to get a cheap flight to St. Charles.
How far in advance should I book a flight to St. Charles?
Secure the travel dates you want and a price you'll love by booking your domestic flight to St. Charles up to 28 days in advance. Search for tickets between two and four months ahead if you're headed to St. Charles from an international destination.**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. Charles?
You can usually find cheap flights to St. Charles on Sundays. Travelers can save around 8% on average compared to those who book on a Friday, which is often the most expensive day to book.**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. Charles?
There are 10 airlines connecting St. Charles with 33 airports worldwide. The key point of arrival to this city is Lambert-St. Louis Intl. Airport (STL). Travel with any of these top airlines to St. Charles:

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

Where do you fly into St. Charles?
Lambert-St. Louis Intl. Airport (STL) is the main airport for travelers flying to St. Charles. Or you could arrive at Spirit of St. Louis Airport (SUS). Compare fares between the two airports to find the most cost-effective or convenient way to fly to St. Charles.
How far is the airport from central St. Charles?
You'll be around 7 mi southeast of the center of St. Charles after touching down at Lambert-St. Louis Intl. Airport (STL).
Can I save money by booking a St. Charles trip package?
Bundle your accommodations and flights and you could save hundreds of dollars. What's more, you can add extras like car rentals and tours to your St. Charles flight and hotel package deal. With Expedia, it's easy to book all your St. Charles travel plans in one place.
Can I change or cancel my flight to St. Charles?
If you bought your flight to St. Charles in the last 24 hours, you can usually change or cancel it without fees. After that, extra charges may apply depending on the airline's terms of service. To learn more, visit our Customer Service Portal. Bear in mind that some flights are non-refundable, so you may be offered a credit for a future flight in place of a direct refund. During your search on Expedia, select the "Changes included" or "No cancel fee" filters to find tickets with flexible change policies.

*Flight schedules are subject to change.

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Travel information

Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Roundtrip price
$56

Trending flights to St. Charles

Prices were available within the past 7 days and start at $28 for one-way flights and $56 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, Jun 17 - Tue, Jun 23
DEN
Denver
STL
St. Louis
$56 Roundtrip, found 1 hour ago
$56
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Wed, Jun 17 from Denver to St. Louis, returning Tue, Jun 23, priced at $56 found 1 hour ago

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