$644 Cheap Korean Air flights Bangkok (BKK) to Washington (IAD)

Landing cheap one-way Korean Air flights from BKK to IAD from $644 on Expedia is easy — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly round-trip fares from $1,071 for your next exciting getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Look for round-trip or one-way flights to Washington in January or February. You could find cheaper fares with Korean Air during these off-season months.

To grab cheap flights from BKK to IAD with Korean Air, start searching about one month before your planned departure. You can save 17% when you book your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Want another tip? Booking on Sunday can lead to average savings of 17% compared to Friday (the most expensive day).**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To see if there’s a direct route from BKK to IAD with Korean Air or other airlines, use our “Nonstop” filter when browsing for flights.

To find the earliest departure from BKK to IAD with Korean Air, sort your results by “Early Morning” and “Morning.” Booking an early flight generally means you’re less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Washington Dulles Intl. Airport (IAD) is the main Washington gateway for Korean Air flights from Suvarnabhumi Intl. Airport (BKK).

Korean Air allows travelers to bring 2 checked-in bags weighing up to 50 lb with maximum dimensions of 62 inches on standard economy flights from BKK to IAD. Additionally, you can take 1 cabin bag with you in the cabin. This hand luggage must not exceed 21 inches x 15 inches x 7 inches and weigh less than 39 lb. Baggage policies can vary depending on the fare type and cabin class, so double-check your booking or Korean Air’s website to avoid any unexpected fees at the airport.

A 5-star airline rating and the ability to rack up points through Korean Airlines Skypass are the start of the reasons to travel from BKK to IAD with Korean Air. Plus, when you join our One Key™ program, you can earn OneKeyCash™* in addition to any airline loyalty program earnings. It’s yours to spend on your next adventure.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s generally possible to modify or cancel your flight, although there may be a charge if you booked more than 24 hours ago. Need flexible options? Use Expedia’s “Changes included” and “No cancel fee” filters to find flights that won’t charge you extra if you need to adjust your plans. To modify your booking, go to “Trips,” select your flight and click on “Manage Booking” for further information.