$512 Cheap British Airways flights Washington (IAD) to Shannon (SNN)

Grab affordable round-trip British Airways flights from $824 from IAD to SNN by filtering your results from “Price (lowest to highest)” on Expedia. Or search for options from $512 for a one-way journey.**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 one-way or return flights to Shannon in January or February. You could find cheaper fares with British Airways during these off-peak travel months.

Landing the best British Airways deals from IAD to SNN is typically all about timing. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. Better yet, you can pocket 17% on average by buying your fare on a Sunday compared to a Friday, which is usually the most expensive day to book.* It’s a good idea to start searching for flights about one month before your travel dates.*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.

Enter your dates, press search and use the “Nonstop” filter on Expedia to browse any direct flights from IAD to SNN with British Airways or other airlines.

Filter your results by “Morning” and “Early Morning” to see the earliest departures from IAD to SNN. Jetting off early means you’re 20% 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.

British Airways flights from Washington Dulles Intl. Airport (IAD) to Shannon come in to land at Shannon Airport (SNN). This is the main gateway here.

British Airways allows passengers to bring 1 checked-in bag weighing up to 50 lb with maximum dimensions of 29 inches x 15 inches x 16 inches on standard economy flights from IAD to SNN. You can also bring 2 cabin bags with you in the cabin. This hand luggage must not exceed 19 inches x 9 inches x 17 inches and be no heavier than 50 lb. Baggage policies can vary depending on the cabin class and fare type, so double-check your booking or British Airways’s website to avoid additional fees at the airport.

Traveling from IAD to SNN with British Airways means enjoying a host of benefits, including an excellent in-flight experience and top-tier customer service. Plus, when booking through Expedia, One Key™ members can earn OneKeyCash™* to spend on select future travel purchases. That’s in addition to the British Airways Executive Club points you can earn with British Airways.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

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