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Cheap flights from Belfast to Seattle from £264

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/3. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
26 Feb — 5 Mar1
1 adult

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 21 February 2025.

Round-trip from

£628

One-way from

£264
Virgin Atlantic
  • Virgin Atlantic
  • 8/5-22/5
  • 2 total stops
  • 49h 20m total
  • Belfast to Seattle
Search Deals
4/3
  • 4/3
  • 3 total stops
  • 37h 39m total
  • Belfast to Seattle
Search Deals

Find flight deals from Belfast to Seattle

Cheapest flights from Belfast to Seattle
Explore the most affordable flight options available from Belfast to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

Mon 15/906:40BHD - SEA
1 stop12h 55mMultiple Airlines
Sun 21/915:05SEA - BHD
2 stops18h 40mMultiple Airlines
Deal found 20/2£614
Thu 8/517:25BHD - SEA
1 stop26h 15mVirgin Atlantic
Thu 22/514:10SEA - BHD
1 stop23h 05mVirgin Atlantic
Deal found 20/2£628
Thu 8/516:20BHD - SEA
1 stop34h 00mIberia
Thu 22/514:25SEA - BHD
2 stops17h 05mIberia
Deal found 20/2£630
Thu 8/506:30BHD - SEA
1 stop17h 20mDelta
Thu 22/518:10SEA - BHD
1 stop14h 45mDelta
Deal found 20/2£634
Mon 15/906:30BHD - SEA
1 stop13h 15mKLM
Sun 21/913:55SEA - BHD
1 stop23h 20mKLM
Deal found 20/2£639
Sun 6/414:55BFS - SEA
2 stops41h 04mMultiple Airlines
Sun 13/415:45SEA - BFS
2 stops22h 35mMultiple Airlines
Deal found 20/2£713
Thu 8/519:25BHD - SEA
2 stops29h 34mAer Lingus
Thu 22/518:45SEA - BHD
2 stops30h 30mAer Lingus
Deal found 20/2£751
Mon 15/919:30BHD - SEA
1 stop30h 50mBritish Airways
Sun 21/920:20SEA - BHD
1 stop13h 25mBritish Airways
Deal found 20/2£1,393

Find flights from Belfast to Seattle within your budget

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 21 February 2025.

Fly from

Belfast

Fly to

Seattle

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

17:25-11:40

1 stop26h 15m

Seattle/Tacoma Intl

Thu 22/5

14:10-21:15

1 stop23h 05m

£628

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

16:20-18:20

1 stop34h 00m

Seattle/Tacoma Intl

Thu 22/5

14:25-15:30

2 stops17h 05m

£630

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

06:30-15:50

1 stop17h 20m

Seattle/Tacoma Intl

Thu 22/5

18:10-16:55

1 stop14h 45m

£634

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

06:30-15:50

1 stop17h 20m

Seattle/Tacoma Intl

Thu 29/5

14:10-16:55

1 stop18h 45m

£661

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 9/5

06:30-11:40

1 stop13h 10m

Seattle/Tacoma Intl

Fri 30/5

18:10-21:15

1 stop19h 05m

£692

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 6/4

14:55-23:59

2 stops41h 04m

Seattle/Tacoma Intl

Sun 13/4

15:45-22:20

2 stops22h 35m

£713

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 8/5

19:25-16:59

2 stops29h 34m

Seattle/Tacoma Intl

Thu 22/5

18:45-09:15

2 stops30h 30m

£751

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 4/3

16:20-21:59

3 stops37h 39m

£264

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 17/3

21:10-09:52

3 stops43h 42m

£304

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 17/3

19:30-12:20

1 stop23h 50m

£833

Flights are sorted by cheapest return flights first.

Deals found on 20/2

Showing 1-10 of 12 results
1
2

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.

Travel insights for flights from Belfast to Seattle

Get recent, data-driven insights about flights from Belfast to Seattle including ideal travel times, pricing trends, and more.

What is the cheapest time of day to fly from BFS to SEA?

Find hourly flight availability from Belfast to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 February 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Belfast to Seattle as you normally would.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 21 February 2025.
Delta
8.0
Very Good
8,212 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very Good
8,212 reviews
Delta
8.0
Very Good
8,212 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very Good
8,212 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic
7.5
Good
654 reviews
Delta
8.0
Very Good
8,212 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Aer Lingus
7.0
Good
1,070 reviews
Delta
8.0
Very Good
8,212 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Iberia
7.0
Good
2,639 reviews
Delta
8.0
Very Good
8,212 reviews
Check prices

Entertainment

7.9

Boarding

8.2

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 1 airline. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • What are the cheapest airlines flying from Belfast to Seattle round-trip?

    Virgin Atlantic, at £628, was found to be the cheapest airline from Belfast to Seattle.Alternate airlines flying return to your destination include Iberia and Delta.

  • What are the cheapest airlines to fly from Belfast to Seattle one-way?

    The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as £833. However, be on the lookout for offers from Iberia and Delta, as they are both options that can get you from Belfast to Seattle for a low price.

  • 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.

  • What is the cheapest month to book a flight from Belfast to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Belfast to Seattle (average of £622). Flying from Belfast to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Belfast?

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

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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 airline flying from Belfast to Seattle

Discover the top airline 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 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£469Average£557FlexibilityNo cancel feeOn-time70%
Search British Airways 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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