Flights to O'Fallon at a glance

Traveling to O'Fallon is easy; you can select from a range of full-service or budget airlines. Explore various flight routes, compare journey times, and choose a flight that aligns with your budget, schedule, and plans to visit the city's renowned attractions and neighborhoods.

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

Popular airport near O'Fallon

O'Fallon is a vibrant city that caters to families and outdoor enthusiasts alike, making it an ideal spot for vacations focused on adventure, romance, and culture. The city is conveniently accessible via a major airport, ensuring that travelers can easily reach this scenic destination.

• Lambert-St. Louis International Airport (STL): Nestled in St. Louis County, Missouri, approximately 19 miles from O'Fallon, this airport facilitates both domestic and international travel. It offers connections to about 210 cities within the U.S. and around 110 international locations. Passengers can opt for upgraded seating options, including first class, premium economy, and business class, depending on the airline and route. Major airlines like Southwest Airlines, American Airlines, and Delta operate from this airport.

Top routes to O'Fallon

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

Cheapest routes to O'Fallon

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

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

Top airlines with flights to O'Fallon

• American Airlines: Operating flights to Lambert-St. Louis International Airport (STL), this carrier represents roughly 28% of incoming traffic to O'Fallon. The average one-way fare is around $330, with first-class service available on select routes.
• Southwest Airlines: Also flying into Lambert-St. Louis International Airport (STL), Southwest Airlines accounts for approximately 27% of arrivals to O'Fallon. Passengers can expect average one-way fares near $240.
• Delta: Providing service to Lambert-St. Louis International Airport (STL), Delta makes up about 20% of arrivals to O'Fallon. The average one-way fare is roughly $290, with options for premium economy and first-class seating depending on the flight.
• United: With flights to Lambert-St. Louis International Airport (STL), United contributes around 15% of arrivals to O'Fallon. The average one-way fare is approximately $320, offering first-class service on certain routes.
• Frontier Airlines: Operating to Lambert-St. Louis International Airport (STL), Frontier Airlines accounts for about 5% of arrivals in O'Fallon. Travelers can find one-way fares averaging around $150, making it a budget-friendly option.

Best time to fly to O'Fallon

The most popular months for travelers to fly to O'Fallon are January, March, and April, when peak temperatures in O'Fallon 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.

Month	Temperature	Precipitation	Cloudiness	Demand	Average one-way Fare
January	31.1°F (-0.5°C)	Light Rain	Mostly Cloudy	Moderately High	$277
February	34.2°F (1.2°C)	Light Rain	Mostly Sunny	Average	$245
March	45.9°F (7.7°C)	Light Rain	Mostly Sunny	Moderately High	$273
April	55.6°F (13.1°C)	Light Rain	Mostly Sunny	Moderately High	$249
May	65.8°F (18.8°C)	Light Rain	Mostly Sunny	Average	$229
June	75.4°F (24.1°C)	Light Rain	Mostly Sunny	Average	$258
July	78.4°F (25.8°C)	Light Rain	Mostly Sunny	Average	$251
August	76.6°F (24.8°C)	Light Rain	Mostly Sunny	Average	$235
September	70.5°F (21.4°C)	Light Rain	Mostly Sunny	Moderately Low	$222
October	57.9°F (14.4°C)	Light Rain	Mostly Sunny	Average	$225
November	45.7°F (7.6°C)	Light Rain	Mostly Sunny	Moderately Low	$243
December	37.0°F (2.8°C)	Light Rain	Mostly Sunny	Moderately 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 O'Fallon

Getting some of the best deals on flights to O'Fallon 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 O'Fallon 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 O'Fallon flight with Expedia. Just select your frequent flyer program and enter your program number when confirming your booking.

*For members. Select hotels.

Arriving in O'Fallon

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

• Public transportation: From Lambert-St. Louis International Airport, Lambert Main Terminal Station, a metro station, is located about 0.1 miles from the airport, providing easy access to public transportation.
• Hotel transfer: Transfers offer a convenient way to reach your hotel in O'Fallon, with private rides that can be arranged in advance.
• Car rental: Renting a car in O'Fallon is a good option if you plan to explore and sightsee beyond the city. Browse cheap car rentals in O'Fallon 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 O'Fallon

• Dardenne Prairie: Dardenne Prairie is located in the area of O'Fallon and is a charming village offering a delightful mix of family-friendly and outdoor activities. Visitors can enjoy various entertainment experiences at the National Equestrian Center and catch a show at the local theater. Golf enthusiasts will appreciate the nearby golf course, while those looking for relaxation can explore the urban park and scenic lake. Don't miss the St. Charles Convention Center for events, and Westport Plaza for a taste of local culture.
• St. Peters: St. Peters is located 4 miles away from O'Fallon and is a vibrant city perfect for families, business trips, or casual exploration. This area boasts a bustling shopping mall and entertainment venues, making it an ideal spot for retail therapy. Key highlights include the St. Charles Convention Center, which caters to business travelers, and Washington University in St. Louis, a modern campus worth visiting. Enjoy the urban parks for a breath of fresh air and a chance to unwind.
• Weldon Spring Heights: Weldon Spring Heights is located 7 miles away from O'Fallon and offers a unique blend of family-friendly fun and outdoor adventures. This quaint village features a theater and shopping mall, providing options for both entertainment and retail. Nature lovers can explore the nearby nature reserve and urban parks for scenic walks. A standout attraction is Six Flags St. Louis, perfect for thrill-seekers and families alike. The St. Charles Convention Center is also nearby, catering to business visitors.

Tips for short-haul flights to O'Fallon

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

• Pack light and skip checked bags—when traveling with budget airlines, it’s often more economical to rely on just a carry-on. Optimize your packing by using mini toiletries, wearing your bulkiest clothing, and coordinating your outfits effectively. This approach also helps you avoid the hassle of waiting at baggage claim once you arrive.
• Bring your own entertainment—many short-haul flights may lack in-flight entertainment options. To keep yourself entertained, 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 advisable to arrive at least 1.5 to 2 hours prior to departure, taking into account potential traffic and security lines.
• Bring your own snacks and water—pack your own snacks and a refillable water bottle to stay hydrated and save money while at the airport.

Tips for long-haul flights to O'Fallon

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 provide free seat selection once online check-in opens, typically 24–48 hours before your flight. Some airlines allow for seat selection even earlier.
• Arrive at the airport in plenty of time—aim to reach the airport at least 3 hours prior to departure for international flights to ensure you have enough time for check-in, security, and immigration.
• Relax at the airport—if you have some extra time, take the opportunity to browse 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 available.
• Adjust to the new time zone mid-flight—begin to synchronize your body clock by changing your watch and sleep schedule to align with your destination's time zone. Try to sleep or stay awake during the flight according to the local time at your arrival destination to help minimize jet lag.