Which airports can I use when flying from Belfast to Seattle?

Flights from Belfast to Seattle may depart from several airports in Belfast area, including Belfast Intl (BFS) and Belfast City (BHD). Flights usually arrive at Seattle/Tacoma Intl (SEA).

Which cabin classes can I book on flights from Belfast to Seattle?

Only Economy class is available on flights from Belfast to Seattle.

Which airports do connecting flights from Belfast to Seattle pass through?

Most connecting flights from Belfast to Seattle pass through London Heathrow (LHR), which handles 100% of one-stop traffic on this route.

Can I save money by using flexible dates for flights from Belfast to Seattle?

Yes. Flexible dates can save you up to 26% on flights from Belfast to Seattle. Thursday is the cheapest departure day at £664 return on average, while Tuesday is the most expensive at £891, a difference of £227. KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Seattle?

Some of the most popular sights in Seattle are The Westin Seattle, Seattle Center, and Seattle Marriott Waterfront. These are among the most viewed places in Seattle on KAYAK.

How long is a flight from Belfast to Seattle?

A direct flight from Belfast to Seattle takes 00m, covering 4,471 miles.

Do I need a passport to fly from Belfast to Seattle?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

What is the time difference between Belfast and Seattle?

Seattle is 8 hours behind Belfast (Pacific Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

Which car hire options are available at Seattle/Tacoma Intl Airport (SEA)?

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car hire companies, with daily rates averaging £45 for economy cars. Top options include: • Europcar • Fox • Thrifty • Budget • Dollar

How much should I expect to pay for a Belfast to Seattle flight?

Return flights from Belfast to Seattle range from £708 to £729, with an average of £725 over the past 12 months. Anything below £708 counts as a good deal.

How much is a return flight from Belfast to Seattle?

Return flights from Belfast to Seattle typically range from £708 to £729. The lowest price found in the past 5 days was £693 on British Airways.

Which airline is the cheapest to fly from Belfast to Seattle?

British Airways (£693) and KLM (£755) are the cheapest airlines to fly return from Belfast to Seattle according to KAYAK data over the last 5 days.

What is the cheapest stopover airport when flying from Belfast to Seattle?

Flights via London Heathrow (LHR) offer the most affordable fares, with an average return price of £700. Based on KAYAK data over the past 3 months.

When flying from Belfast to Seattle, which airport offers the shortest stopover?

London Heathrow (LHR) had the shortest average connection time for Belfast to Seattle stopovers at 8h 43m over the past 3 months.

£485 CHEAP FLIGHTS from Belfast to Seattle (BF1 - SEA)

Save 34% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest return flight

£693

Typical prices: £708-£729

British Airways

Sun 2/12Sun 9/12

BHD - SEA • 1 stop

Direct flights

Not available

There are currently no direct flights between Belfast and Seattle. You'll need to take a connecting flight to reach the destination.

Insights

Start a new search

KAYAK searches hundreds of sites at once to find you the best travel deals.

We hope you enjoy your trip to Seattle!

Flight Deals

Cheap Flights from Belfast to Seattle

Discover the best prices for you by selecting your travel dates on KAYAK.

Return

One-way

Recent return flight deals from Belfast to Seattle

Wed, 2 Dec - Wed, 9 Dec

09:15 - 16:50BHD Belfast City-SEA Seattle/Tacoma Intl

15h 35m1 stop London Heathrow

18:45 - 19:05SEA Seattle/Tacoma Intl-BHD Belfast City

16h 20m1 stop London Heathrow

£693British Airways

Sat, 20 Mar - Tue, 30 Mar

11:45 - 17:50BHD Belfast City-SEA Seattle/Tacoma Intl

13h 05m1 stop London Heathrow

20:20 - 18:55SEA Seattle/Tacoma Intl-BHD Belfast City

14h 35m1 stop London Heathrow

£703British Airways

Wed, 2 Dec - Wed, 9 Dec

11:40 - 16:50BHD Belfast City-SEA Seattle/Tacoma Intl

13h 10m1 stop London Heathrow

09:15 - 10:05SEA Seattle/Tacoma Intl-BHD Belfast City

16h 50m2 stops Philadelphia London Heathrow

£704British Airways

Wed, 2 Dec - Wed, 9 Dec

11:40 - 00:47BHD Belfast City-SEA Seattle/Tacoma Intl

21h 07m2 stops London Heathrow Chicago O'Hare Intl

14:07 - 16:55SEA Seattle/Tacoma Intl-BHD Belfast City

18h 48m2 stops Dallas/Fort Worth London Heathrow

£710British Airways

Sat, 20 Feb - Mon, 5 Jul

06:35 - 11:25BHD Belfast City-SEA Seattle/Tacoma Intl

12h 50m1 stop London Heathrow

13:35 - 12:55SEA Seattle/Tacoma Intl-BHD Belfast City

15h 20m1 stop London Heathrow

£713British Airways

Sat, 20 Mar - Tue, 30 Mar

07:25 - 20:40BHD Belfast City-SEA Seattle/Tacoma Intl

20h 15m2 stops London Gatwick Reykjavik Keflavik Intl

19:00 - 20:30SEA Seattle/Tacoma Intl-BHD Belfast City

17h 30m2 stops Reykjavik Keflavik Intl London Gatwick

£730Multiple Airlines

Sat, 20 Mar - Tue, 30 Mar

07:25 - 20:40BHD Belfast City-SEA Seattle/Tacoma Intl

20h 15m2 stops London Gatwick Reykjavik Keflavik Intl

20:20 - 18:55SEA Seattle/Tacoma Intl-BHD Belfast City

14h 35m1 stop London Heathrow

£737Multiple Airlines

Sat, 20 Mar - Tue, 30 Mar

06:35 - 12:25BHD Belfast City-SEA Seattle/Tacoma Intl

12h 50m1 stop London Heathrow

10:31 - 15:20SEA Seattle/Tacoma Intl-BHD Belfast City

20h 49m2 stops Chicago O'Hare Intl London Heathrow

£739British Airways

Sat, 20 Feb - Mon, 5 Jul

11:45 - 00:34BHD Belfast City-SEA Seattle/Tacoma Intl

20h 49m2 stops London Heathrow Chicago O'Hare Intl

20:20 - 17:30SEA Seattle/Tacoma Intl-BHD Belfast City

13h 10m1 stop London Heathrow

£740British Airways

Sat, 20 Feb - Mon, 5 Jul

17:20 - 16:00BHD Belfast City-SEA Seattle/Tacoma Intl

30h 40m2 stops Amsterdam Schiphol Portland

17:45 - 16:55SEA Seattle/Tacoma Intl-BHD Belfast City

15h 10m2 stops Salt Lake City Amsterdam Schiphol

£755KLM

Booking Insights

Price, demand, and travel trends for Belfast to Seattle flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

Prices

Airlines

Stopovers

How much is a return flight from Belfast to Seattle? This analysis is based on the cheapest return price found on KAYAK in the last 12 months by searching for a flight from Belfast to Seattle departing in December.

Find deals

Cheapest flight	£693

Return flight from Belfast City Airport to Seattle

When to book flights from Belfast to Seattle

Are your dates flexible? Find out the best times to travel from Belfast to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated return price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which cabin classes can I book on flights from Belfast to Seattle?
Only Economy class is available on flights from Belfast to Seattle.
How long is a flight from Belfast to Seattle?
A direct flight from Belfast to Seattle takes 00m, covering 4,471 miles.
Do I need a passport to fly from Belfast to Seattle?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
How much should I expect to pay for a Belfast to Seattle flight?
Return flights from Belfast to Seattle range from £708 to £729, with an average of £725 over the past 12 months. Anything below £708 counts as a good deal.
Which car hire options are available at Seattle/Tacoma Intl Airport (SEA)?
Seattle/Tacoma Intl Airport (SEA) hosts 5 major car hire companies, with daily rates averaging £45 for economy cars. Top options include:

• Europcar
• Fox
• Thrifty
• Budget
• Dollar
Which airports can I use when flying from Belfast to Seattle?
Flights from Belfast to Seattle may depart from several airports in Belfast area, including Belfast Intl (BFS) and Belfast City (BHD). Flights usually arrive at Seattle/Tacoma Intl (SEA).
Which airports do connecting flights from Belfast to Seattle pass through?
Most connecting flights from Belfast to Seattle pass through London Heathrow (LHR), which handles 100% of one-stop traffic on this route.
Can I save money by using flexible dates for flights from Belfast to Seattle?
Yes. Flexible dates can save you up to 26% on flights from Belfast to Seattle. Thursday is the cheapest departure day at £664 return on average, while Tuesday is the most expensive at £891, a difference of £227.

KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.
What is the time difference between Belfast and Seattle?
Seattle is 8 hours behind Belfast (Pacific Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.
What popular places can I visit in Seattle?
Some of the most popular sights in Seattle are The Westin Seattle, Seattle Center, and Seattle Marriott Waterfront. These are among the most viewed places in Seattle on KAYAK.

If your dates are flexible, aim for a Thursday departure and avoid flying on Tuesday. On this route, Thursday flights average £664, about £227 less than Tuesday fares (25% savings) based on the last 12 months.
If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.

• Coast Gateway Hotel
• Seattle Airport Marriott
• Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport

More options for your flight from Belfast to Seattle

Add a hotel or car hire

Airports

Cabin class

Direct flights

Origins

Other destinations

Complete your trip to Seattle with a hotel stay or car hire

Car hire in Seattle

Hotels in Seattle

Holidays in Seattle

SEA

£485 Find Cheap Flights from Belfast to Seattle – Compare and Save

Everything you should know

Cheap Flights from Belfast to Seattle

Recent return flight deals from Belfast to Seattle

Recent one-way flight deals from Belfast to Seattle

Price, demand, and travel trends for Belfast to Seattle flights

How much is a return flight from Belfast to Seattle?

Which airline is the cheapest to fly from Belfast to Seattle?

What is the cheapest stopover airport when flying from Belfast to Seattle?

When flying from Belfast to Seattle, which airport offers the shortest stopover?

Key details for Belfast to Seattle flights

Cheapest flight

When to book flights from Belfast to Seattle

Your Belfast to Seattle flight questions, answered

Your guide to booking Belfast to Seattle flights

More options for your flight from Belfast to Seattle

Complete your trip to Seattle with a hotel stay or car hire

Information on your arrival and departure airports

Cabin class types available on flights from Belfast to Seattle

Find direct flights to and from Belfast and Seattle

Flights from domestic origins to Seattle

Flights to other popular destinations