$336 Cheap Flights from Seattle (SEA) to Belfast (BHD)

View $336 flight on Mon, Jul 27, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Belfast (BHD-George Best Belfast City)

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Cheap Flights from Seattle to Belfast (SEA-BHD)

Prices were available within the past 7 days and start at $336 for one-way flights and $907 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Oct 13 - Thu, Oct 22
SEA
Seattle
BHD
Belfast
$907 Roundtrip, found 1 day ago
$907
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Oct 13 from Seattle to Belfast, returning Thu, Oct 22, priced at $907 found 1 day ago
British Airways
Wed, Nov 18 - Tue, Nov 24
SEA
Seattle
BHD
Belfast
$909 Roundtrip, found 12 hours ago
$909
Roundtrip
found 12 hours ago
Select British Airways flight, departing Wed, Nov 18 from Seattle to Belfast, returning Tue, Nov 24, priced at $909 found 12 hours ago
British Airways
Tue, Oct 13 - Thu, Oct 22
SEA
Seattle
BHD
Belfast
$909 Roundtrip, found 1 day ago
$909
Roundtrip
found 1 day ago
Select British Airways flight, departing Tue, Oct 13 from Seattle to Belfast, returning Thu, Oct 22, priced at $909 found 1 day ago
American Airlines
Mon, Sep 21 - Wed, Sep 30
SEA
Seattle
BHD
Belfast
$911 Roundtrip, found 7 hours ago
$911
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Mon, Sep 21 from Seattle to Belfast, returning Wed, Sep 30, priced at $911 found 7 hours ago
American Airlines
Mon, Sep 21 - Wed, Sep 30
SEA
Seattle
BHD
Belfast
$912 Roundtrip, found 7 hours ago
$912
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Mon, Sep 21 from Seattle to Belfast, returning Wed, Sep 30, priced at $912 found 7 hours ago
American Airlines
Mon, Sep 21 - Wed, Sep 30
SEA
Seattle
BHD
Belfast
$913 Roundtrip, found 7 hours ago
$913
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Mon, Sep 21 from Seattle to Belfast, returning Wed, Sep 30, priced at $913 found 7 hours ago
American Airlines
Tue, Sep 8 - Tue, Sep 15
SEA
Seattle
BHD
Belfast
$914 Roundtrip, found 3 days ago
$914
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Sep 8 from Seattle to Belfast, returning Tue, Sep 15, priced at $914 found 3 days ago
Delta
Tue, Oct 13 - Thu, Oct 22
SEA
Seattle
BHD
Belfast
$928 Roundtrip, found 1 day ago
$928
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Oct 13 from Seattle to Belfast, returning Thu, Oct 22, priced at $928 found 1 day ago
Virgin Atlantic
Tue, Oct 13 - Thu, Oct 22
SEA
Seattle
BHD
Belfast
$928 Roundtrip, found 1 day ago
$928
Roundtrip
found 1 day ago
Select Virgin Atlantic flight, departing Tue, Oct 13 from Seattle to Belfast, returning Thu, Oct 22, priced at $928 found 1 day ago
KLM
Tue, Oct 13 - Thu, Oct 22
SEA
Seattle
BHD
Belfast
$989 Roundtrip, found 1 day ago
$989
Roundtrip
found 1 day ago
Select KLM flight, departing Tue, Oct 13 from Seattle to Belfast, returning Thu, Oct 22, priced at $989 found 1 day ago

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City) cost?
You can find cheap one-way flights from $336 and cheap return flights from $907 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City) with Expedia. Roundtrip flights usually range from $854 to $5495. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
The cheapest month to fly from SEA to BHD is October when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
Enter SEA to BHD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
KLM is one of the cheapest airlines offering connecting flights from Seattle, WA (SEA) to Belfast (BHD) with a layover in Hartsfield-Jackson Atlanta Intl. (ATL), starting from around $932. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
The earliest flight from Seattle, WA (SEA) to Belfast (BHD) usually departs at around 12:55 AM, operated by American Airlines and British Airways. This seasonal service is available in March, offering a unique opportunity to explore Belfast. An early flight allows you to arrive in the morning and start your day in this vibrant city. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to George Best Belfast City (BHD) are in the early morning, from 6am to 9am. About 33% of passengers prefer this time window. Many major carriers, including American Airlines, British Airways, and Alaska Airlines, offer flights during this window. This timing works well because it allows you to start your day early and arrive in Belfast with plenty of time to explore.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
Flying from SEA to BHD with a connection usually takes about 17 hours 50 minutes, traveling roughly 4,476 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
Business class seats are offered on the SEA to BHD route with British Airways.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Belfast from Seattle - Tacoma Intl. (SEA)?
When traveling from Seattle - Tacoma Intl. (SEA) to Belfast, you can fly into Belfast Intl. (BFS) and George Best Belfast City (BHD). Some flights may connect through major hubs like Dallas-Fort Worth Intl. (DFW), Heathrow (LHR), O'Hare Intl. (ORD) before reaching Belfast. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City) Belfast Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
George Best Belfast City
Airlines serving
Aer Lingus, American Airlines, British Airways, Delta, KLM, Virgin Atlantic
Roundtrip price
$907
Distance
4475 mi

*Flight schedules are subject to change.

*Available to One Key members.

 

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