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$19 Cheap Flights to St. Charles, MO

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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 $19 for one-way flights and $38 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Southwest Airlines
American Airlines
United
Alaska Airlines

Alternative airports near St. Charles

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

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

From $148 - $387 per traveler.

What you need to know for your flight to St. Charles

Flights to St. Charles at a glance

Traveling to St. Charles is easy—simply choose from a variety of airlines, including options for cheap flights to St. Charles and flights to St. Louis. Compare travel times to find the best fit for your budget and schedule as you plan to explore the city's iconic sights and neighborhoods.

  • Major airport near St. Charles: Lambert-St. Louis International Airport (STL)
  • Flights per week: 3,150+ flights arriving at St. Charles airport
  • Number of airlines that fly to St. Charles: around 40+ carriers

Popular airport near St. Charles

St. Charles is a vibrant city perfect for family getaways, romantic escapes, and cultural experiences. Visitors are drawn to its outdoor attractions and city charm. Conveniently, major airports near St. Charles, including MidAmerica St. Louis Airport, provide easy access for travelers looking for domestic flights.

  • Lambert-St. Louis International Airport (STL): Situated in St. Louis County, Missouri, approximately 8 miles from St. Charles, this airport provides access to both domestic and international flights. It links travelers to around 210 domestic cities and approximately 110 international destinations. Passengers can opt for first class, premium economy, or business class seats for enhanced comfort based on the airline and route. Notable airlines operating here include Southwest Airlines, American Airlines, and Delta.

Top routes to St. Charles

  • New York (JFK/LGA) to St. Charles (STL), with one-way airfare from around $90
  • Las Vegas (LAS) to St. Charles (STL), with one-way flight options from around $60
  • Orlando (MCO) to St. Charles (STL), with one-way flights starting at around $45
  • Denver (DEN) to St. Charles (STL), with one-way tickets available from around $45
  • Los Angeles (LAX) to St. Charles (STL), with one-way tickets available from around $120

Cheapest routes to St. Charles

  • Chicago (ORD/MDW) to St. Charles (STL), with low-cost one-way tickets from around $40
  • Kansas City (MCI) to St. Charles (STL), with budget one-way fares from around $40
  • Quincy (UIN) to St. Charles (STL), with cheap one-way fares from around $40
  • Orlando (MCO) to St. Charles (STL), with low one-way fares from around $45
  • Denver (DEN) to St. Charles (STL), with budget one-way fares from around $45

*Flight times and fares vary by season and availability and are based on one-way routes

Top airlines with flights to St. Charles

  • American Airlines: Operating flights to Lambert-St. Louis International Airport (STL), American Airlines represents about 28% of the incoming flights to St. Charles. The average fare for a one-way ticket is around $330, with the possibility of first-class service available on select routes.
  • Southwest Airlines: With routes to Lambert-St. Louis International Airport (STL), Southwest Airlines accounts for roughly 27% of the arrivals in St. Charles. Travelers can expect an average one-way fare of about $240.
  • Delta: Serving Lambert-St. Louis International Airport (STL), Delta comprises approximately 20% of the flights arriving in St. Charles. The average one-way fare is around $290, and premium cabin choices may include both premium economy and first-class service depending on the route.
  • United: Flying to Lambert-St. Louis International Airport (STL), United is responsible for about 15% of the arrivals in St. Charles. The average one-way fare is estimated at $320, with first-class service available on certain routes.
  • Frontier Airlines: Operating flights to Lambert-St. Louis International Airport (STL), Frontier Airlines accounts for roughly 5% of arrivals in St. Charles. The typical one-way fare is around $150, making it a budget-friendly option for travelers.

Best time to fly to St. Charles

The most popular months for travelers to fly to St. Charles are January, March, and April, when peak temperatures in St. Charles can reach up to 55.6°F in April. If you prefer quieter travel, consider September, the least busy time to visit with temperatures around 70.5°F and typically the lowest average one-way fare (around $222), roughly 9% cheaper than the yearly average. Looking for additional cheaper months to fly? October, May, and August offer average one-way fares of around $230, making them good options for flexible travelers.

calendar iconMonthtemperature iconTemperaturerain iconPrecipitationmostly cloudy iconCloudinesscrowd level iconDemandprice iconAverage one-way Fare
January31.1°F (-0.5°C)Light RainMostly CloudyModerately High$277
February34.2°F (1.2°C)Light RainMostly SunnyAverage$245
March45.9°F (7.7°C)Light RainMostly SunnyModerately High$273
April55.6°F (13.1°C)Light RainMostly SunnyModerately High$249
May65.8°F (18.8°C)Light RainMostly SunnyAverage$229
June75.4°F (24.1°C)Light RainMostly SunnyAverage$258
July78.4°F (25.8°C)Light RainMostly SunnyAverage$251
August76.6°F (24.8°C)Light RainMostly SunnyAverage$235
September70.5°F (21.4°C)Light RainMostly SunnyModerately Low$222
October57.9°F (14.4°C)Light RainMostly SunnyAverage$225
November45.7°F (7.6°C)Light RainMostly SunnyModerately Low$243
December37.0°F (2.8°C)Light RainMostly SunnyModerately Low$249

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

How to save money on a flight to St. Charles

Getting some of the best deals on flights to St. Charles is all about timing and flexibility. Here are some key tips to help you save:

  1. Compare flight options—use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  2. Set up price alerts—as an Expedia member you can use Price Tracking to receive notifications when flight prices change.
  3. Bundle and save—book a flight and unlock a hotel deal on Expedia*, or explore our St. Charles hotel and flight deals.
  4. Think about luggage-nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your baggage allowance before confirming your booking to avoid excess baggage fees at the airport.
  5. Earn miles—you can earn airline miles when you book your St. Charles flight with Expedia. Just select your frequent flyer program and enter your program number when confirming your booking.

*For members. Select hotels.

Arriving in St. Charles

St. Charles welcomes travelers through its range of transport options based on price, convenience, and proximity. Here's how to reach St. Charles efficiently:

  • Public transportation: From Lambert-St. Louis International Airport, Lambert Main Terminal Station, a metro station, is located just 0.1 miles from the airport, making it easily accessible for travelers.
  • Hotel transfer: Transfers offer a convenient way to reach your hotel in St. Charles, with private rides that can be arranged in advance.
  • Car rental: Renting a car in St. Charles is a good option if you plan to explore and sightsee beyond the city. Browse cheap car rentals in St. Charles on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.

Where to stay in and around St. Charles

  • Weldon Spring Heights: Located in the area of St. Charles, Weldon Spring Heights is an inviting village perfect for families looking to enjoy outdoor activities and urban experiences. Travelers can indulge in shopping at local centers and catch an exciting show at nearby theaters. The area is also home to scenic nature reserves and urban parks, making it ideal for a leisurely stroll. Notable attractions include Six Flags St. Louis, which offers thrilling rides for adventure seekers, and the St. Charles Convention Center, a hub for business events and conferences.
  • Earth City: Earth City is located 2 miles drive away from St. Charles and offers a dynamic blend of family-friendly activities and entertainment options. Visitors will find ample opportunities to explore arena entertainment facilities, theaters, and shopping malls. The local attractions also include event conference venues and charming urban parks. Key highlights worth visiting are the St. Charles Convention Center, suitable for business travelers, and Westport Plaza, a lively neighborhood that encapsulates the essence of city life.
  • Maryland Heights: Maryland Heights is located 6 miles drive away from St. Charles and is a vibrant city that caters to families and entertainment seekers alike. Here, you'll find a mix of arenas, theaters, and shopping centers to explore. Local landmarks include event conference venues and sports facilities that host various events. Notable points of interest are Westport Plaza, which offers a diverse city experience, and Washington University in St. Louis, a modern campus that adds a touch of academic charm to your visit.

Tips for short-haul flights to St. Charles

For quick getaways, efficiency is key. Here is how to make your short-haul journey smoother:

  • Pack light and skip checked bags—when flying with budget airlines, it's often more economical to travel with just a carry-on. Maximize space by using mini toiletries, wearing your heaviest clothing, and planning your outfits thoughtfully. This approach also allows you to bypass the wait at baggage claim upon arrival.
  • Bring your own entertainment—many short-haul flights might not provide in-flight entertainment. To keep yourself occupied, download TV shows, movies, music, or podcasts ahead of time, and consider bringing a book. Remember to fully charge your devices before you board.
  • Arrive at the airport in plenty of time—even for short or domestic flights, it's wise to arrive at least 1.5 to 2 hours prior to departure, taking into account traffic and security lines.
  • Bring your own snacks and water—pack some snacks and carry a refillable water bottle to stay hydrated and save money while at the airport.

Tips for long-haul flights to St. Charles

Flying long-haul sometimes requires extra planning to ensure a comfortable journey:

  • Select your seat in advance—for longer flights, choosing your seat is crucial for comfort. Full-service airlines often allow seat selection for free once online check-in opens, typically 24–48 hours before your flight. Some airlines even provide the option to select seats earlier than this.
  • Arrive at the airport in plenty of time—make sure to arrive at least 3 hours prior to departure for international flights to accommodate check-in, security, and immigration procedures.
  • Relax at the airport—if you have some extra time, take the opportunity to explore the shops, grab a coffee, or unwind at the gate or in a departure lounge if you have access. Airport Wi-Fi is generally free and widely available.
  • Adjust to the new time zone mid-flight—begin syncing your body clock by changing your watch and sleep schedule to align with your destination's time zone. Aim to sleep or stay awake during the flight based on the local time at your arrival destination to help minimize jet lag.

Frequently asked questions

What month is the cheapest to fly to St. Charles?
Plan your trip for September 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.

*Available to One Key members.

Book with confidence

Tips to find the cheapest flights to St. Charles

The cheapest day to fly

Get started finding a cheap flight to St. Charles 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

September is the cheapest month to fly to St. Charles. 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. Charles. 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. Charles, 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. Charles

The lowest price for round-trip flights to St. Charles in 2026 starts from from $38, while one-way tickets start from from $19. 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. Charles. 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. Charles

Frontier Airlines, Delta, Southwest Airlines, American Airlines, United, Alaska Airlines are just some of the airlines that can typically offer cheap tickets to St. Charles. 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. Charles and countless more destinations worldwide.

The most affordable airports to fly into

To view the cheapest airports to fly into for St. Charles, 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. Charles. 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. Charles 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. Charles

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. Charles.

Stopover savings

The cheapest tickets to St. Charles are sometimes those with a stopover. Book one of these flights, and you'll change planes at an airport en route to St. Charles. 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. Charles 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. Charles. Simply download the free Expedia app to your smart device and activate St. Charles 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. Charles. 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.

Tips to find the cheapest flights to St. Charles

Travel information

Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Destination city name
St. Louis
Roundtrip price
$38

Trending flights to St. Charles

Prices were available within the past 7 days and start at $19 for one-way flights and $38 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

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