£248 Cheap Flights from Seattle (SEA) to Belfast (BHD)

View £248 flight on Mon, 8 Feb 2027Opens in a new window

Flight 1

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

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

Prices were available within the past 7 days and start at £248 for one-way flights and £690 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KLM
Mon, 8 Feb - Mon, 22 Feb
SEA
Seattle
BHD
Belfast
£690 Return, found 6 days ago
£690
Return
found 6 days ago
Select KLM flight, departing Mon, 8 Feb from Seattle to Belfast, returning Mon, 22 Feb, priced at £690 found 6 days ago
Virgin Atlantic
Mon, 8 Feb - Mon, 22 Feb
SEA
Seattle
BHD
Belfast
£706 Return, found 6 days ago
£706
Return
found 6 days ago
Select Virgin Atlantic flight, departing Mon, 8 Feb from Seattle to Belfast, returning Mon, 22 Feb, priced at £706 found 6 days ago
British Airways
Fri, 30 Oct - Wed, 11 Nov
SEA
Seattle
BHD
Belfast
£709 Return, found 1 day ago
£709
Return
found 1 day ago
Select British Airways flight, departing Fri, 30 Oct from Seattle to Belfast, returning Wed, 11 Nov, priced at £709 found 1 day ago
Delta
Mon, 8 Feb - Mon, 22 Feb
SEA
Seattle
BHD
Belfast
£710 Return, found 6 days ago
£710
Return
found 6 days ago
Select Delta flight, departing Mon, 8 Feb from Seattle to Belfast, returning Mon, 22 Feb, priced at £710 found 6 days ago
KLM
Tue, 13 Oct - Mon, 2 Nov
SEA
Seattle
BHD
Belfast
£713 Return, found 3 days ago
£713
Return
found 3 days ago
Select KLM flight, departing Tue, 13 Oct from Seattle to Belfast, returning Mon, 2 Nov, priced at £713 found 3 days ago
British Airways
Fri, 30 Oct - Wed, 11 Nov
SEA
Seattle
BHD
Belfast
£715 Return, found 1 day ago
£715
Return
found 1 day ago
Select British Airways flight, departing Fri, 30 Oct from Seattle to Belfast, returning Wed, 11 Nov, priced at £715 found 1 day ago
KLM
Fri, 30 Oct - Wed, 11 Nov
SEA
Seattle
BHD
Belfast
£724 Return, found 1 day ago
£724
Return
found 1 day ago
Select KLM flight, departing Fri, 30 Oct from Seattle to Belfast, returning Wed, 11 Nov, priced at £724 found 1 day ago
British Airways
Tue, 13 Oct - Mon, 2 Nov
SEA
Seattle
BHD
Belfast
£727 Return, found 3 days ago
£727
Return
found 3 days ago
Select British Airways flight, departing Tue, 13 Oct from Seattle to Belfast, returning Mon, 2 Nov, priced at £727 found 3 days ago
KLM
Fri, 30 Oct - Wed, 11 Nov
SEA
Seattle
BHD
Belfast
£728 Return, found 1 day ago
£728
Return
found 1 day ago
Select KLM flight, departing Fri, 30 Oct from Seattle to Belfast, returning Wed, 11 Nov, priced at £728 found 1 day ago
Aer Lingus
Thu, 28 May - Tue, 2 Jun
SEA
Seattle
BHD
Belfast
£1,105 Return, found 18 hours ago
£1,105
Return
found 18 hours ago
Select Aer Lingus flight, departing Thu, 28 May from Seattle to Belfast, returning Tue, 2 Jun, priced at £1,105 found 18 hours ago

Frequently asked questions

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.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
There are approximately 29 connecting flights per day from Seattle - Tacoma Intl. (SEA) to George Best Belfast City (BHD). Some common connection points include Unknown (DUB), O'Hare Intl. (ORD), and Heathrow (LHR).
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
The earliest flight from Seattle - Tacoma Intl. (SEA) to George Best Belfast City (BHD) typically departs at approximately 5:25 AM local time. This is a seasonal service active in September, operated by American Airlines and British Airways. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
Wednesday typically has the most flights from Seattle - Tacoma Intl. (SEA) to George Best Belfast City (BHD), with around 52 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines, Alaska Airlines, and British Airways.
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 morning, between 6am and 9am. About 32% of passengers prefer this time. 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 journey early and arrive at your destination with plenty of time to settle in.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Belfast (BHD-George Best Belfast City)?
A flight from SEA to BHD with a layover takes around 16 hours 20 minutes, with the route covering approximately 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)?
Select the "Business class" and "First class" filters when looking for SEA to BHD flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
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)?
From Seattle - Tacoma Intl. (SEA), you can fly into Belfast Intl. (BFS) and George Best Belfast City (BHD) in Belfast. 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) flight and hotel package 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, British Airways, KLM
Return price
£689
Distance
7160 km

Book with confidence

Compare flights from Seattle to Belfast easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Seattle to Belfast. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to George Best Belfast City in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Seattle - Tacoma Intl. to George Best Belfast City.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Seattle - Tacoma Intl. (SEA) to George Best Belfast City (BHD)

The easiest way to view the best deals on flights from Seattle to Belfast today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Seattle - Tacoma Intl. to George Best Belfast City start at just £690 and range up to £1,105.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Seattle and Belfast
  • booking your flight during February, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Seattle to Belfast flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Seattle - Tacoma Intl. to George Best Belfast City for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Seattle to Belfast easily and book with confidence

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*Available to Expedia members.