$2,341 Cheap Scandinavian Airlines flights London (LHR) to Washington (IAD)

Finding cheap one-way SAS flights from LHR to IAD from $2,341 on Expedia is easy — just filter by “Price (lowest to highest).” Alternatively, check out our affordable return fares from $579 for your next 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.

January is one of the cheapest months to jet off to Washington with SAS. You could also find excellent prices on return and one-way tickets in February.

Snagging the best SAS deals from LHR to IAD often comes down to booking at the right time. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. As an added bonus, you can pocket 17% on average by buying your tickets on a Sunday compared to a Friday, which is often the most expensive day to book.* It’s a good idea to start checking out flights about one month before you plan to travel.*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.

Use our “Nonstop” filter when searching for direct SAS flights from LHR to IAD. You can also compare other carriers servicing the same direct trip.

To find the earliest departure from LHR to IAD with SAS, filter your results by “Morning” and “Early Morning.” Choosing an early flight usually means cancellations are less likely.**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.

Take a SAS flight from Heathrow Airport (LHR) to Washington, and you’ll probably arrive at Washington Dulles Intl. Airport (IAD). This is the airline’s primary hub in this city.

For checked luggage, passengers can take 1 checked-in bag weighing up to 50 lb with dimensions not exceeding 62 inches. You can also travel with 1 cabin bag in the cabin when flying standard economy from LHR to IAD with SAS. This carry-on should weigh less than 17 lb and be no bigger than 9 inches x 15 inches x 21 inches. Exceeding these limits can mean extra charges, so check SAS’s baggage allowance guidelines before you begin packing.

A rewarding loyalty program and the chance to rack up points through SAS EuroBonus are the start of the reasons to leave from LHR to IAD with SAS. 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 future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are generally free within 24 hours of making a booking, but your airline may charge you after that time. For further information about modifying your flights, head to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to change your plans without additional charges, apply the “Changes included” or “No cancel fee” filter when organizing your next trip.