Flight Deals from Washington Dulles Airport to Seoul from $548

Flights from Washington to Seoul are most expensive in late December and cheapest in early February.

When planning your trip from Washington to Seoul, it's important to be aware that flight prices fluctuate significantly throughout the year. You'll notice a considerable peak in prices during late December, making it the highest price period, often exceeding $2000. Conversely, the lowest prices can typically be found in early February, where fares drop below $1500. The peak season tends to last from late spring through summer, with prices generally higher than $1700, while the low season occurs early in the year and during late summer, where you might find deals around $1400. Booking well in advance can help you secure lower fares during these low periods.

Book your Washington to Seoul flights 38-66 days in advance for the best prices, with significant increases noted within 11 days of departure.

When planning your trip from Washington to Seoul, aim to book your flights between 38 and 66 days prior to departure for optimal prices. The best deals are usually around 53 days out, when prices hover around $1,563. It's wise not to book earlier than 66 days, as prices could reach $1,709, resulting in a substantial increase. If you're considering booking last minute, be warned that prices can surge significantly within 11 days of departure, potentially reaching $1,993. To ensure savings and availability, secure your tickets as soon as you can if your departure is less than 28 days away.