$349 Cheap Flights to Osan

Flights to Osan at a glance

Traveling to Osan is straightforward; you can choose from various airlines, including full-service and budget options. Compare journey times to find the flight to Osan that best fits your budget and schedule, allowing you to explore the city’s renowned attractions and neighborhoods.

• Major airports near Osan: Incheon International Airport (ICN), Gimpo International Airport (GMP)
• Closest (typical) airport to Osan: Gimpo International Airport, GMP (around 31 miles)
• Flights per week: 2,000+ flights arriving across Osan airports
• Number of airlines that fly to Osan: around 65+ carriers

Popular airports near Osan

Osan is a lively city ideal for family getaways, outdoor activities, and urban exploration. Travelers flock to Osan for its rich culture and business opportunities. Conveniently, the city is served by two major airports, along with nearby options like Songtan Station and Pyeongchon Station for easy access.

• Incheon International Airport (ICN): Situated approximately 39 miles from Osan, this airport handles international flights to over 220 destinations across the globe. Travelers have the option to elevate their experience with business class, premium economy, or first-class service, based on the airline and route. Notable carriers operating from this airport include Korean Air, Asiana Airlines, and Air Premia.
• Gimpo International Airport (GMP): Located around 31 miles from Osan, this airport provides both domestic and international services, connecting to about 3 cities within South Korea and 9 international locations. Passengers can enhance their journey by opting for business class service on select routes, depending on their airline. Key airlines serving this airport include Korean Air, Asiana Airlines, and Japan Airlines.

Top routes to Osan

• Los Angeles (LAX) to Osan (GMP/ICN), with one-way airfare from around $410
• Tokyo (HND/NRT) to Osan (GMP/ICN), with one-way fares starting at around $95
• San Francisco (SFO) to Osan (ICN), with one-way flights starting at around $330
• Osaka (KIX) to Osan (GMP/ICN), with one-way fares starting at around $85
• Seattle (SEA) to Osan (ICN), with one-way flights starting at around $420

Cheapest routes to Osan

• Jeju (CJU) to Osan (GMP), with cheap one-way fares from around $30
• Busan (PUS) to Osan (GMP), with cheap one-way fares from around $30
• Kaohsiung (KHH) to Osan (ICN), with low one-way fares from around $75
• Beijing (PEK/PKX) to Osan (GMP/ICN), with low one-way fares from around $75
• Weihai (WEH) to Osan (ICN), with affordable one-way prices from around $75

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

Top airlines with flights to Osan

• Korean Air: Provides service to both Gimpo International Airport (GMP) and Incheon International Airport (ICN), representing approximately 21% of arrivals in Osan. The typical one-way fare is around $400, and premium cabin choices may include business class depending on the route.
• Asiana Airlines: Operates flights to Gimpo International Airport (GMP) and Incheon International Airport (ICN), accounting for roughly 19% of arrivals in Osan. Average one-way fares are about $380, with routes potentially offering business class as a premium cabin option.
• Delta: Serves Incheon International Airport (ICN) and makes up approximately 12% of arrivals to Osan. The average fare for a one-way ticket is around $760, with premium cabin services possibly including both premium economy and business class, subject to the route.
• United: Flies into Incheon International Airport (ICN), contributing about 6% of arrivals at Osan. The average price for a one-way flight is approximately $670, with premium cabin options that may feature premium economy and business class, depending on specific routes.
• Air Premia: Provides flights to Incheon International Airport (ICN), accounting for around 5% of arrivals in Osan. The typical one-way fare is approximately $430, and depending on the route, premium cabin services may include premium economy seating.

Best time to fly to Osan

The most popular months for travelers to fly to Osan are March, April, and June, when peak temperatures in Osan can reach up to 71.4°F in June. If you prefer quieter travel, consider August, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 77.7°F. For better deals, January usually offers the lowest average one-way fare around $524, roughly 10% cheaper than the yearly average. Looking for additional cheaper months to fly? August, November, and July offer average one-way fares of around $534, 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 Osan

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

*For members. Select hotels.

Arriving in Osan

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

• Public transportation: From Incheon International Airport, Incheon Int'l Airport Terminal 2 Station, a metro station, is just a short 0.1-mile walk away, while Yongyu Station, a train station, is located about 3.6 miles from the airport and is typically reached by car.
• Hotel transfer: Transfers offer a convenient way to reach your hotel in Osan, with private rides that can be arranged in advance.
• Car rental: Renting a car in Osan is a good option if you plan to explore and sightsee beyond the city. Browse cheap car rentals in Osan 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 Osan

• Yongin: Yongin is located 12 miles drive away from Osan and is a vibrant city that offers a wealth of family-friendly activities and outdoor adventures. Visitors can immerse themselves in the thrills of Everland, a popular theme park perfect for entertainment. For a taste of culture, the Korean Folk Village showcases traditional Korean life and history. Nature lovers can unwind at Gwanggyo Lake Park, an urban oasis ideal for families seeking a blend of relaxation and outdoor fun. Yongin is a fantastic destination for those looking to create lasting memories.
• Anseong: Anseong is located 16 miles away from Osan and is a charming city known for its engaging family activities and outdoor experiences. Travelers can explore Anseong Farmland, where the beauty of agriculture comes to life. For amusement, Everland is also accessible from Anseong. Culture enthusiasts will appreciate the Chungang University Museum, which provides insight into the region's rich heritage. With shopping centers and parks nearby, Anseong is a delightful stop for visitors seeking both excitement and leisure.
• Manho: Manho is located 18 miles away from Osan and is a quaint village that caters to business travelers and sports enthusiasts alike. The area is renowned for its ski facilities, making it a great winter destination. Nature seekers can visit the Pyeongtaek Tourist Complex, featuring a picturesque lake that’s perfect for romantic outings and scenic views. Additionally, Sapgyoho Tourist Park offers an urban park experience suited for families. History buffs can explore the beauty of Gongseri Cathedral, a cultural highlight of the village.

Tips for short-haul flights to Osan

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, traveling with just a carry-on is often the more economical choice. Maximize space by using mini toiletries, wearing your heaviest clothing, and coordinating outfits efficiently. This approach also allows you to bypass the wait at baggage claim upon arrival.
• Bring your own entertainment—many short-haul flights do not provide in-flight entertainment options. To keep yourself engaged, download TV shows, movies, music, or podcasts beforehand and consider bringing a book. Remember to charge your devices fully before you board.
• Arrive at the airport in plenty of time—even for short or domestic flights, it is 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 snacks and a reusable water bottle to stay hydrated and save on costs at the airport.

Tips for long-haul flights to Osan

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 often allow free seat selection once online check-in begins, typically 24–48 hours prior to your flight. Some airlines may permit seat selection even earlier than this.
• Arrive at the airport in plenty of time—aim to arrive at the airport at least 3 hours before departure for international flights to accommodate check-in, security checks, and immigration procedures.
• Relax at the airport—if you have extra time to spare, take the opportunity to explore the shops, grab a coffee, or unwind at the gate or in a departure lounge if you have access. Most airports offer free and accessible Wi-Fi.
• Adjust to the new time zone mid-flight—begin to align your body clock by changing your watch and adjusting your sleep schedule to the time zone of your destination. Try to sleep or stay awake during the flight according to the local time at your arrival point to help minimize jet lag.

Tips to find the cheapest flights to Osan

The cheapest day to fly

Get started finding a cheap flight to Osan 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

November is the cheapest month to fly to Osan. 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 Osan. 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 Osan, 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 Osan

The lowest price for round-trip flights to Osan in 2026 starts from $664, while one-way tickets start from from $349. 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 Osan. If you have a preferred departure time or airline, you can use the handy filters to customize your search.

The cheapest airlines flying to Osan

Cathay Pacific, Air Canada, Alaska Airlines, Delta, United are just some of the airlines that can typically offer cheap tickets to Osan. 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 Osan and countless more destinations worldwide.

The most affordable airports to fly into

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

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 Osan.

Stopover savings

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