$498 Cheap British Airways flights Seattle (SEA) to Shannon (SNN)

View $498 flight on Tue, Sep 2, 2025Opens in a new window

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$498 Cheap British Airways flights Seattle (SEA) to Shannon (SNN)

Prices were available within the past 7 days and start at $498 for one-way flights and $688 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Mon, Aug 4 - Wed, Aug 20
SEA
Seattle
SNN
Shannon
$688 Roundtrip, found 6 days ago
$688
Roundtrip
found 6 days ago
Select British Airways flight, departing Mon, Aug 4 from Seattle to Shannon, returning Wed, Aug 20, priced at $688 found 6 days ago
Flights from Seattle (SEA) to Shannon (SNN)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Shannon
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Delta, JetBlue Airways, United
Popular airline
British Airways
Distance
4488 mi

Frequently asked questions

How much is a British Airways flight from Seattle - Tacoma Intl. Airport (SEA) to Shannon Airport (SNN)?
You can find cheap round-trip British Airways flights from $688 from SEA to SNN by sorting your results from "Price (lowest to highest)" on Expedia. Or look for options from $498 for a one-way trip.**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.
What is the cheapest month to fly from SEA to SNN with British Airways?
Search for one-way or round-trip flights to Shannon in January or February. You could find lower fares with British Airways during these off-peak travel months.
What is the cheapest time to book flights from Seattle - Tacoma Intl. Airport (SEA) to Shannon Airport (SNN) with British Airways?
Search for British Airways flights from SEA to SNN about one month before you want to go. The cheapest time to reserve an international flight is generally 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. Regardless of itinerary and fare class, the best day of the week to book international airfare is usually Sunday. Friday can be the most expensive. Travelers who book on a Sunday can save an average of 17% compared to those who book on a Friday.**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.
Does British Airways fly nonstop from Seattle - Tacoma Intl. Airport (SEA) to Shannon Airport (SNN)?
Click on the "Nonstop" filter when browsing for direct British Airways flights from SEA to SNN. It's also a great way to compare other airlines servicing the same nonstop route.
What is the earliest British Airways flight from SEA to SNN?
Browse British Airways's earliest flights from SEA to SNN by using the "Morning" and "Early Morning" filters. Not only will you arrive sooner, early departures are also 20% less likely to be canceled.**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.
What airports does British Airways fly into in Shannon?
Take a British Airways flight from Seattle - Tacoma Intl. Airport (SEA) to Shannon, and you'll probably touch down at Shannon Airport (SNN). This is the airline's primary hub in this destination.
What kind of luggage can I take on a British Airways flight from Seattle - Tacoma Intl. Airport (SEA) to Shannon Airport (SNN)?
For checked luggage, passengers can take 1 checked-in bag weighing up to 50 lb with dimensions not exceeding 29 inches x 15 inches x 16 inches. You can also travel with 2 cabin bags in the cabin when flying standard economy from SEA to SNN with British Airways. This carry-on has to weigh less than 50 lb and be no bigger than 19 inches x 9 inches x 17 inches. Exceeding these limits can mean extra fees, so check British Airways's baggage allowance rules before you begin packing.
Why fly with British Airways from SEA to SNN?
Flying from SEA to SNN with British Airways comes with a host of perks, including top-tier customer service and an excellent in-flight experience. Plus, when booking through Expedia, One Key™ members can collect OneKeyCash™* to use on select future travel purchases. That's on top of 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.
Can I change or cancel my British Airways flight from Seattle - Tacoma Intl. Airport (SEA) to Shannon Airport (SNN)?
Depending on your fare type, a fee is typically charged if you change or cancel your flight more than 24 hours after it's confirmed. To find flexible fares, select our "Changes included" and "No cancel fee" boxes while looking for flights. To learn more about canceling or changing your reservation, go to "Trips," select your flight and click on "Manage Booking."

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*Available to One Key members.