$34 Cheap Flights to Caseyville, IL

Flights to Caseyville at a glance

Traveling to Caseyville is easy—simply select from a range of full-service or budget airlines. Compare flight durations and choose the option that best fits your budget and schedule as you plan to explore the city's iconic attractions and neighborhoods.

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

Popular airport near Caseyville

Caseyville is a charming city perfect for family getaways, outdoor excursions, and business trips. Visitors are drawn to its vibrant culture and urban amenities. Conveniently, a major airport serves this city, making travel easy for those exploring Caseyville.

• Lambert-St. Louis International Airport (STL): Situated in St. Louis County, Missouri, approximately 22 miles from Caseyville, this airport serves as a vital hub for both domestic and international travel. It connects to around 210 cities within the U.S. and about 110 global destinations. Passengers can opt for first class, premium economy, or business class seating for enhanced comfort based on their chosen routes and airlines. Key airlines operating here include Southwest Airlines, American Airlines, and Delta.

Top routes to Caseyville

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

Cheapest routes to Caseyville

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

• American Airlines: Provides service to Lambert-St. Louis International Airport (STL), representing roughly 28% of arrivals in Caseyville. The typical one-way fare is about $330, with the possibility of first class as a premium cabin choice, depending on the route.
• Southwest Airlines: Operates flights to Lambert-St. Louis International Airport (STL), making up around 27% of the arrivals to Caseyville. Passengers can expect an average one-way fare of approximately $240.
• Delta: Serves Lambert-St. Louis International Airport (STL), accounting for around 20% of arrivals to Caseyville. The average one-way fare hovers around $290, and premium cabin offerings may include premium economy and first class, contingent on the specific route.
• United: Flies into Lambert-St. Louis International Airport (STL), capturing about 15% of the arrivals in Caseyville. The average one-way fare is about $320, with potential first-class service available based on the route.
• Frontier Airlines: Provides flights to Lambert-St. Louis International Airport (STL), contributing approximately 5% of arrivals to Caseyville. Their average one-way fare is around $150, making it an economical choice for travelers.

Best time to fly to Caseyville

The most popular months for travelers to fly to Caseyville are January, March, and April, when peak temperatures in Caseyville can reach up to 55.4°F in April. If you prefer quieter travel, consider September, the least busy time to visit with temperatures around 70°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.

*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 Caseyville

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

*For members. Select hotels.

Arriving in Caseyville

Caseyville welcomes travelers through its range of transport options based on price, convenience, and proximity. Here's how to reach Caseyville 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 Caseyville, with private rides that can be arranged in advance.
• Car rental: Renting a car in Caseyville is a good option if you plan to explore and sightsee beyond the city. Browse cheap car rentals in Caseyville 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 around Caseyville

• Fairview Heights: Fairview Heights is located 3 miles drive away from Caseyville and offers a vibrant city experience perfect for families and outdoor enthusiasts. Visitors can enjoy a variety of activities, including shopping at the mall center or attending events at the local arena entertainment facility. Key attractions to explore include the iconic Gateway Arch, the culturally rich Cahokia Mounds State Historic Site, and the lively Enterprise Center, making it an inviting destination for both leisure and culture seekers.
• O'Fallon: O'Fallon is located 5 miles away from Caseyville and is a welcoming city ideal for family outings and outdoor adventures. The area features numerous venues such as theaters and parks, providing diverse entertainment options. Notable points of interest include the Gateway Arch, McKendree University, and the Gateway Conference Center, which is suitable for business travelers. With its charming atmosphere, O'Fallon offers a delightful blend of education and recreation for visitors of all ages.
• Shiloh: Shiloh is located 7 miles drive away from Caseyville and is a family-friendly city perfect for outdoor exploration and urban experiences. This community boasts recreational areas and shopping centers that cater to a variety of interests. Travelers can enjoy the serene surroundings at local parks, visit the Southwestern Illinois College for educational insights, or take their furry friends to Shiloh Dog Park. With its blend of nature and urban life, Shiloh is a lovely stop for anyone looking to unwind and explore.

Tips for short-haul flights to Caseyville

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 your space by using travel-sized toiletries, wearing your bulkiest clothing, and coordinating outfits effectively. This strategy also helps you avoid the hassle of waiting at baggage claim upon arrival.
• Bring your own entertainment—many short-haul flights may not provide 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 charge your devices fully before boarding.
• Arrive at the airport in plenty of time—even for short or domestic flights, it's advisable to get to the airport 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 a refillable water bottle to stay hydrated and save money while at the airport.

Tips for long-haul flights to Caseyville

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

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

Tips to find the cheapest flights to Caseyville

The cheapest day to fly

Get started finding a cheap flight to Caseyville 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 Caseyville. 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 Caseyville. 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 Caseyville, 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 Caseyville

The lowest price for round-trip flights to Caseyville in 2026 starts from $68, while one-way tickets start from from $34. 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 Caseyville. If you have a preferred departure time or airline, you can use the handy filters to customize your search.

The cheapest airlines flying to Caseyville

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

The most affordable airports to fly into

To view the cheapest airports to fly into for Caseyville, 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 Caseyville. 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 Caseyville 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 Caseyville

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 Caseyville.

Stopover savings

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