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Cheap flights from Belfast to Seattle from £616

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
7 Dec — 14 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Belfast (BF1) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 7 November 2025.

Round-trip from

£616
British Airways
  • British Airways
  • 22/4-4/5
  • 2 total stops
  • 27h 55m total
  • Belfast to Seattle
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Find flight deals from Belfast to Seattle

Enter your travel dates to find the best prices.

Best flights from Belfast to Seattle
Discover carefully curated flight deals from Belfast to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 7 November 2025.

Wed 22/413:50BHD - SEA
1 stop12h 35mBritish Airways
Mon 4/513:35SEA - BHD
1 stop15h 20mBritish Airways
Deal found 5/11£616
Wed 22/406:30BHD - SEA
2 stops17h 43mMultiple Airlines
Mon 4/517:35SEA - BHD
1 stop15h 20mMultiple Airlines
Deal found 5/11£642
Thu 5/315:05BHD - SEA
1 stop28h 25mAmerican Airlines
Mon 9/315:35SEA - BHD
2 stops35h 55mAmerican Airlines
Deal found 5/11£652
Tue 21/406:35BHD - SEA
1 stop13h 00mBritish Airways
Mon 4/513:35SEA - BHD
1 stop18h 05mBritish Airways
Deal found 5/11£624
Wed 22/406:00BFS - SEA
1 stop20h 25mMultiple Airlines
Mon 4/519:00SEA - BFS
2 stops20h 05mMultiple Airlines
Deal found 5/11£693
Tue 21/420:55BFS - SEA
1 stop22h 40mMultiple Airlines
Mon 4/515:45SEA - BFS
2 stops23h 20mMultiple Airlines
Deal found 5/11£700

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 7 November 2025.
Use the filters below to find and compare flights from Belfast to Seattle that are best for you.

Fly from

Belfast

Fly to

Seattle

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

13:50-18:25

1 stop12h 35m

Seattle/Tacoma Intl

Mon 4/5

13:35-12:55

1 stop15h 20m

£616

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 21/4

06:35-11:35

1 stop13h 00m

Seattle/Tacoma Intl

Mon 4/5

13:35-15:40

1 stop18h 05m

£624

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

06:30-16:13

2 stops17h 43m

Seattle/Tacoma Intl

Mon 4/5

17:35-16:55

1 stop15h 20m

£642

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

15:05-11:30

1 stop28h 25m

Seattle/Tacoma Intl

Mon 9/3

15:35-10:30

2 stops35h 55m

£652

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 22/4

06:00-18:25

1 stop20h 25m

Seattle/Tacoma Intl

Mon 4/5

19:00-23:05

2 stops20h 05m

£693

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Tue 21/4

20:55-11:35

1 stop22h 40m

Seattle/Tacoma Intl

Mon 4/5

15:45-23:05

2 stops23h 20m

£700

Flights are sorted by cheapest return flights first.

Deals found on 5/11

Best time to book a flight from Belfast to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Belfast with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Belfast to Seattle
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 7 November 2025.
Read through reviews of airlines operating flights from Belfast to Seattle, such as American Airlines and British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,040 reviews
Check prices

Comfort

7.2

Entertainment

6.9

Boarding

7.5

Overall

7.2

Crew

8.0

Food

6.4

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.
American Airlines
7.2
Good
11,040 reviews
American Airlines
7.2
Good
11,040 reviews
Check prices

Comfort

7.2

Entertainment

6.9

Boarding

7.5

Overall

7.2

Crew

8.0

Food

6.4

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.
British Airways
6.7
Okay
7,500 reviews
American Airlines
7.2
Good
11,040 reviews
Check prices

Comfort

7.2

Entertainment

6.9

Boarding

7.5

Overall

7.2

Crew

8.0

Food

6.4

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.

Related info for your journey

Find useful and relevant information for your journey from Belfast to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Belfast?

    Most people fly into Seattle/Tacoma Intl (SEA) if they book a flight to Seattle from Belfast. On average, Seattle/Tacoma Intl has 0 inbound flights from Belfast per day from 2 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How long is the flight from Belfast to Seattle?

    For as low as £616, British Airways can have you in Seattle from Belfast in 12h 35m. Airlines will cover a distance of 4472 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Belfast to Seattle that include hotel bookings?

    Yes. In addition to deals on Belfast to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Belfast to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast to Seattle.

  • Can I find deals for business class flights from Belfast to Seattle?

    Yes. Cheapflights offers flight deals from Belfast to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Belfast to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Belfast Intl to Seattle flights
Belfast City to Seattle flights

Top 2 airlines flying from Belfast to Seattle

Discover the top 2 airlines that operate flights from Belfast to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 7 November 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£449Average£530FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£574Average£574FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Belfast to Seattle?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Belfast to Seattle. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Belfast to Seattle?

Millions of users choose and trust Cheapflights to book the best flight deals from Belfast to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Belfast to Seattle with no change fees?

Certainly. Search results for flights to Seattle from Belfast shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Belfast to Seattle become cheaper?

Yes, Cheapflights offers price alerts on Belfast to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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