$519 Cheap Flights from Washington (IAD) to Seoul (ICN)

Washington (IAD) to Seoul (ICN) at a glance

Embark on your journey from Washington Dulles International Airport (IAD) to Incheon International Airport (ICN) with a range of airlines catering to this international long-haul route. Explore various options, from full-service carriers to budget-friendly flights, to find the best itinerary that aligns with your travel plans and budget. Prepare to uncover the vibrant sights and neighborhoods of Seoul as you search for flights from D.C. to Seoul, ensuring an adventure tailored to your needs.

• Fastest flight duration: around 15h 30m non-stop
• Route distance: roughly 7,000 miles (11,270 km)
• Flights per week: around 12 departures on average
• Typical fares (one-way): economy tickets often range from $505–$1555, depending on seasonality and how far ahead you book

Flights from Washington Dulles International Airport (IAD) to Incheon International Airport (ICN)

Based on recent traveler bookings, here are the top airlines favored for flights from Washington to Seoul, featuring both non-stop and one-stop options. Common layovers include Pearson International Airport (YYZ) with an approximate 1 hour and 45-minute wait, Seattle-Tacoma International Airport (SEA) at around 2 hours and 30 minutes, and Dallas-Fort Worth International Airport (DFW) with about a 1 hour and 15-minute layover. This allows you to customize your journey by balancing price, total travel time, and cabin class for the ideal itinerary.

• Korean Air: This full-service airline provides both non-stop and one-stop options. One-way ticket prices generally fall between $830 and $3435. It holds about 32% of the departures on this route, with a non-stop flight time averaging 15 hours and 30 minutes.
• Delta: Another full-service option, Delta offers both non-stop and one-stop services, with one-way fares typically ranging from $850 to $3930. It represents roughly 24% of the departures on this route, and passengers can expect a non-stop flight duration of about 15 hours and 30 minutes.
• Air Canada: This full-service carrier specializes in one-stop service, with one-way fares typically ranging from $580 to $3660. It constitutes around 17% of the departures on this route, with an in-flight time of approximately 17 hours and 30 minutes, leading to a total journey time of about 20 hours, including layovers.
• Asiana Airlines: Offering one-stop services, this full-service airline has one-way fares that usually range from $585 to $1185. It accounts for approximately 13% of the departures for this route, with a flight duration of about 17 hours and 30 minutes, resulting in a total travel time near 20 hours, factoring in layovers.
• American Airlines: This full-service carrier provides one-stop services, with one-way fares typically ranging from $505 to $980. It makes up approximately 7% of the departures on this route, with an in-flight time of around 17 hours and 30 minutes, leading to a total journey duration of roughly 20 hours, including layovers.

Travelers can enhance their journey from Washington to Seoul by upgrading their flight. Premium options include Korean Air's business class, Delta's offerings in both business and premium economy, and Air Canada's business class for a more comfortable travel experience.

Best time to fly from Washington (IAD) to Seoul (ICN)

The most popular months for travelers flying from Washington to Seoul are March, April, and June, when peak temperatures in Seoul reach up to 70.9°F in June. If you prefer quieter travel, consider July, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 77°F. For better deals, October usually offers the lowest average one-way fare around $1052. Flight availability peaks in May and October, with approximately 14 flights per week, making it easier to find convenient departure times. January has the fewest flights, with approximately 10 flights per week.

• Cheapest time to fly: October usually offers good deals with average one-way fare around $1052, roughly 12% cheaper than the yearly average.
• More budget-friendly months to fly: August, September, and February typically offer average one-way fares roughly ranging from $1055 to $1098.
• Most flight options: May and October have the highest number of flights from Washington to Seoul, with approximately 14 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 route from Washington (IAD) to Seoul (ICN)

• Washington to Seoul (DCA-ICN): Ronald Reagan Washington National Airport (DCA) is located approximately 23 miles from Washington Dulles International Airport (IAD). On this route, one-way economy fares generally fall between $460 and $1225, influenced by the time of year and how far in advance you book. Travelers can choose from both one-stop and multi-stop flights, with common layover points being Pearson International Airport (YYZ) and Pierre Elliott Trudeau International Airport (YUL). Major airlines operating on this route include Air Canada and American Airlines. There are also options for business class service available along this route.

How to find the best prices for flights from Washington (IAD) to Seoul (ICN)

Getting some of the best deals on flights from Washington to Seoul 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 typically available when booking 2-8 weeks in advance, although most travelers tend to book at least 2 months ahead. Evening departures (6 PM-12 AM) often offer lower prices, while morning flights (5 AM-12 PM) are the most popular. Additionally, flying on Thursdays generally results in cheaper fares, although Tuesday 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 Incheon International Airport from Washington Dulles International Airport

Seoul welcomes travelers from Washington with a range of transport options based on price, convenience, and proximity. For departures, Washington Dulles International Airport is roughly a 40-minute drive (covering about 29 miles) from central Washington. Here's how to reach Seoul efficiently:

• Hotel transfer: Transfers offer a convenient way to reach your hotel in Seoul, with private rides that can be arranged in advance.
• Car rental: Renting a car from Incheon International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Incheon 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 Incheon International Airport, Incheon Int'l Airport Terminal 2 Station, a metro station, is located about 0.1 miles away on foot, while Yongyu Station, a train station, is about 3.6 miles from the airport and is best accessed by car.

Washington to Seoul Flights

The cheapest times to fly from Washington to Seoul

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 Washington to Seoul are during the month of November. You can find some of the cheapest flights from Washington to Seoul with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Washington to Seoul

Sunday is one of the best days to book for cheap flights from Washington to Seoul: 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 Washington to Seoul

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 Washington to Seoul in 2026. You can also book with separate airlines for your outbound and return journeys, from $519 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 Washington to Seoul 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 Washington to Seoul 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.