$634 Cheap Flights from Seoul (ICN) to Seattle (SEA)

Seoul (ICN) to Seattle (SEA) at a glance

Traveling from Seoul (ICN) to Seattle (SEA) offers a range of airline options on this international long-haul route. You can explore various choices, from full-service airlines to budget carriers, to discover the best fit for your travel budget, schedule, and plans. Whether you're looking for cheap flights from Seoul or a specific itinerary, you’ll find essential details for your flight from Incheon International Airport to Seattle-Tacoma International Airport here.

• Fastest flight duration: around 10h 15m non-stop
• Route distance: roughly 5,200 miles (8,370 km)
• Flights per week: around 15+ flights with multiple daily departures on average
• Typical fares (one-way): economy tickets often range from $265–$1190, depending on seasonality and how far ahead you book

Flights from Incheon International Airport (ICN) to Seattle - Tacoma International Airport (SEA)

Based on recent traveler bookings, here are the most popular airlines flying from Seoul to Seattle, featuring both non-stop and one-stop flights. Common layover choices include Vancouver International Airport (YVR) with a layover of about 1 hour and 45 minutes, Daniel K. Inouye International Airport (HNL) at roughly 3 hours, and Taoyuan International Airport (TPE) with a 1 hour and 30-minute stop. This variety allows you to mix and match options based on price, total travel time, and cabin class to find the ideal itinerary.

• Delta: As a comprehensive airline, Delta provides both non-stop and one-stop flights, with one-way ticket prices generally falling between $315 and $1790. It represents about 27% of departures on this route, with a standard non-stop travel duration of 10 hours and 15 minutes.
• Korean Air: This full-service airline also offers non-stop and one-stop options, with one-way fares usually ranging from $305 to $2235. Korean Air accounts for roughly 24% of departures on this route, featuring a typical non-stop flight duration of 10 hours and 15 minutes.
• Asiana Airlines: Known for its full-service offerings, Asiana Airlines provides both non-stop and one-stop services, with one-way fares typically ranging from $295 to $2200. It makes up about 22% of departures on this route, with a usual non-stop journey lasting 10 hours and 15 minutes.
• Hawaiian Airlines: Another full-service option, Hawaiian Airlines offers both non-stop and one-stop flights, with one-way fares generally between $265 and $2820. This airline accounts for roughly 9% of departures on this route, with a standard non-stop journey time of 10 hours and 15 minutes.
• Air Canada: This full-service carrier provides one-stop and multi-stop service, with one-way fares typically ranging from $340 to $625. It represents about 9% of departures on this route, featuring a typical one-stop flight duration of 12 hours and 15 minutes, with total travel time around 15 hours and 45 minutes.

Travelers have the option to upgrade their flight from Seoul to Seattle. Top airlines include Korean Air and Delta, both offering business class and premium economy class, while Asiana Airlines features a business class option for a more comfortable journey.

Best time to fly from Seoul (ICN) to Seattle (SEA)

The most popular months for travelers flying from Seoul to Seattle are January, April, and July, when peak temperatures in Seattle reach up to 67.1°F in July. If you prefer quieter travel, consider October, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 52.7°F. For better deals, December usually offers the lowest average one-way fare around $564. Flight availability peaks in December, with approximately 22 flights per week, making it easier to find convenient departure times. February has the fewest flights, with approximately 12 flights per week.

• Cheapest time to fly: December usually offers good deals with average one-way fare around $564, roughly 26% cheaper than the yearly average.
• Another budget-friendly time to fly: October typically offers an average one-way fare of around $631.
• Most flight options: December has the highest number of flights from Seoul to Seattle, with approximately 22 flights per week, giving you more flexibility in scheduling your trip.

*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.

Alternative routes from Seoul (ICN) to Seattle (SEA)

• Seoul to Seattle (ICN-BFI): Boeing Field Airport (BFI) lies approximately 6 miles from Seattle - Tacoma International Airport (SEA), offering convenient access for travelers arriving in the Seattle area.
• Seoul to Seattle (GMP-SEA): Gimpo International Airport (GMP) is located around 21 miles from Incheon International Airport (ICN), providing an alternate departure point for those flying to Seattle.
• Seoul to Seattle (GMP-BFI): From Gimpo International Airport (GMP), which is about 21 miles from Incheon International Airport (ICN), travelers can reach Boeing Field Airport (BFI), just 6 miles from Seattle - Tacoma International Airport (SEA).

How to find the best prices for flights from Seoul (ICN) to Seattle (SEA)

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

1. Best times to book and fly: cheaper fares are usually available when booking 2-8 weeks in advance, although most travelers tend to book at least 2 months ahead. Evening departures between 6 pm and 12 am often offer lower prices and are the most popular. Additionally, flying on Sunday typically results in cheaper fares, while Friday remains the most sought-after travel day.
2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
4. 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.
5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
6. 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 allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Seattle - Tacoma International Airport from Incheon International Airport

Seattle welcomes travelers from Seoul with a range of transport options based on price, convenience, and proximity. Seattle city center is approximately a 20-minute drive (covering about 14 miles) from Seattle - Tacoma International Airport, depending on traffic. Here's how to reach Seattle efficiently:

• Hotel transfer: Transfers offer a convenient way to reach your hotel in Seattle, with private rides that can be arranged in advance.
• Car rental: Renting a car from Seattle - Tacoma International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Seattle - Tacoma International Airport on Expedia.
• Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
• Public transportation: From Seattle-Tacoma International Airport, SeaTac/Airport Station, a metro station, is located about 0.3 miles from the airport and easily accessible on foot, while Tukwila Station, a train station, is situated approximately 4.3 miles away and typically reached by car.

Seoul to Seattle Flights

The cheapest times to fly from Seoul to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seoul to Seattle are during the month of February. You can find some of the cheapest flights from Seoul to Seattle with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Seoul to Seattle

Sunday is one of the best days to book for cheap flights from Seoul to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Seoul to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seoul to Seattle in 2026. You can also book with separate airlines for your outbound and return journeys, from $634 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seoul to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seoul to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.