How long is the flight from Belfast to State of Washington?

There are many flights that can get you from Belfast to State of Washington in 15h 35m. Fly via British Airways to get the fastest option. There are 4472 mi between Belfast and State of Washington.

In terms of precipitation, rainfall in State of Washington 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 State of Washington when rainfall is around 18.0 mm.

If weather is an important factor for your trip to State of Washington, 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).

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

When flying from Belfast to State of Washington, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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

How can I find direct flights from Belfast to Washington?

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

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

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

£491+ Cheap Flights from Belfast to Washington

Cheap flight deals from Belfast to Washington

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

Cheapest flights from Belfast to Washington
Explore the most affordable flight options available from Belfast to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 September 2026.

Mon 12/1010:00 -

1 stop18h 14m

Mon 19/1017:30 -

1 stop17h 20m

Deal found 18/9£491

Mon 12/1007:00 -

1 stop21h 14m

Mon 19/1017:30 -

1 stop19h 00m

Deal found 18/9£509

Wed 18/1106:55 -

3 stops34h 37m

Fri 11/1214:35 -

2 stops24h 00m

Deal found 17/9£565

Wed 18/1109:15 -

1 stop15h 35m

Fri 11/1218:45 -

1 stop14h 40m

Deal found 17/9£565

Thu 15/1012:45 -

1 stop13h 40m

Mon 19/1010:31 -

2 stops20h 59m

Deal found 17/9£599

Mon 12/1006:50 -

2 stops18h 20m

Mon 19/1006:12 -

2 stops22h 43m

Deal found 18/9£631

Fri 9/1006:05 -

2 stops22h 35m

Thu 15/1019:00 -

2 stops17h 35m

Deal found 16/9£682

Fri 30/1007:25 -

3 stops33h 02m

Fri 6/1114:35 -

2 stops23h 20m

Deal found 15/9£830

Sun 1/1107:50 -

2 stops17h 10m

Sun 8/1114:35 -

2 stops21h 55m

Deal found 17/9£862

Find flight deals from Belfast to Washington

Round-trip from	£491

12/10-19/10
2 total stops
35h 34m total
Belfast to Washington

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Use the filters below to find and compare flights from Belfast to Washington that are best for you.

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Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Mon 12/10

10:00-20:14

1 stop18h 14m

Seattle/Tacoma Intl

Mon 19/10

17:30-18:50

1 stop17h 20m

£491

Fastest return journey

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Wed 18/11

09:15-16:50

1 stop15h 35m

Seattle/Tacoma Intl

Fri 11/12

18:45-17:25

1 stop14h 40m

£565

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Wed 18/11

06:55-09:32

3 stops34h 37m

Seattle/Tacoma Intl

Fri 11/12

14:35-22:35

2 stops24h 00m

£565

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 15/10

20:35-11:35

1 stop23h 00m

Seattle/Tacoma Intl

Mon 19/10

20:20-20:35

1 stop16h 15m

£599

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 14/1

11:05-16:50

1 stop13h 45m

Seattle/Tacoma Intl

Sun 17/1

10:25-16:50

2 stops22h 25m

£609

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Fri 9/10

06:05-20:40

2 stops22h 35m

Seattle/Tacoma Intl

Thu 15/10

19:00-20:35

2 stops17h 35m

£682

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Fri 30/10

07:25-09:27

3 stops33h 02m

Seattle/Tacoma Intl

Fri 6/11

14:35-21:55

2 stops23h 20m

£830

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Sun 1/11

21:00-20:59

3 stops31h 59m

Seattle/Tacoma Intl

Sun 8/11

10:10-21:20

3 stops27h 10m

£1,046

Flights are sorted by cheapest return flights first.

Deals found on 18/9

Sorted by cheapest first

Best time to book a flight from Belfast to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Belfast with our price prediction graph.

BFS-SEA

BHD-SEA

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 Washington

BF1-USWA

BFS-SEA

BHD-SEA

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from Belfast to State of Washington?
There are many flights that can get you from Belfast to State of Washington in 15h 35m. Fly via British Airways to get the fastest option. There are 4472 mi between Belfast and State of Washington.
Can I find deals for flights from Belfast to Washington that include hotel bookings?
Yes. In addition to deals on Belfast to Washington flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Belfast to Washington?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast to Washington.
Can I find deals for business class flights from Belfast to Washington?
Yes. Cheapflights offers flight deals from Belfast to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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When you search for this flight from Belfast to Washington, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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Millions of users choose and trust Cheapflights to book the best flight deals from Belfast to Washington 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 Washington with no change fees?

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Cheap flights from Belfast to Washington from £491

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Belfast to Washington

Cheapest flights from Belfast to WashingtonExplore the most affordable flight options available from Belfast to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 September 2026.

Explore the most affordable flight options available from Belfast to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 September 2026.

Best flights from Belfast to WashingtonDiscover carefully curated flight deals from Belfast to Washington that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 September 2026.

Discover carefully curated flight deals from Belfast to Washington that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 September 2026.

Last-minute flights from Belfast to WashingtonDiscover last-minute flight deals from Belfast to Washington. Data last updated 19 September 2026 and is based on user searches.

Discover last-minute flight deals from Belfast to Washington. Data last updated 19 September 2026 and is based on user searches.

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Best time to book a flight from Belfast to Washington

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Cheapflights Insights

Related info for your journey

How long is the flight from Belfast to State of Washington?

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

How can I find direct flights from Belfast to Washington?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Belfast to Washington

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Washington by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Belfast to Washington by cabin class

Find flights from Belfast to Washington, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Belfast and Washington flights

Browse other Belfast and Washington flight options. Last updated on 19 September 2026.

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

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

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

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

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Cheapest flights from Belfast to Washington
Explore the most affordable flight options available from Belfast to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 September 2026.

Best flights from Belfast to Washington
Discover carefully curated flight deals from Belfast to Washington that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 September 2026.

Last-minute flights from Belfast to Washington
Discover last-minute flight deals from Belfast to Washington. Data last updated 19 September 2026 and is based on user searches.