How do I get Price Alerts for flights from Belfast Intl Airport to State of Washington?

Price Alerts will notify you by email when the price for flights to State of Washington from Belfast Intl Airport decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

How does momondo find its flight prices?

momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

How old do you have to be to fly from Belfast Intl Airport to Washington?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Belfast Intl Airport to Washington.

What documentation or ID do you need to fly to Washington?

The necessary travel and health documents for your Washington trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£687 Cheap Flights from Belfast Intl Airport to State of Washington in 2026/27

Find the cheapest flights from Belfast Intl Airport to Washington

Return

Cheap return flights

Enter your travel dates to find the best prices.

06:30 - 15:55BFS Belfast Intl-SEA Seattle/Tacoma Intl

17h 25m2 stops London Gatwick Frankfurt am Main

17:50 - 20:30SEA Seattle/Tacoma Intl-BFS Belfast Intl

18h 40m2 stops Frankfurt am Main London Gatwick

£687Multiple Airlines

Thu, 26 Nov - Thu, 3 Dec

06:30 - 15:55BFS Belfast Intl-SEA Seattle/Tacoma Intl

17h 25m2 stops London Gatwick Frankfurt am Main

14:35 - 22:15SEA Seattle/Tacoma Intl-BFS Belfast Intl

23h 40m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Birmingham

£849Multiple Airlines

Thu, 26 Nov - Thu, 3 Dec

08:50 - 09:27BFS Belfast Intl-SEA Seattle/Tacoma Intl

32h 37m3 stops Paris Charles de Gaulle Calgary Vancouver Intl

14:35 - 22:15SEA Seattle/Tacoma Intl-BFS Belfast Intl

23h 40m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Birmingham

£855Multiple Airlines

Thu, 26 Nov - Thu, 3 Dec

19:20 - 17:00BFS Belfast Intl-SEA Seattle/Tacoma Intl

29h 40m3 stops London Stansted Stockholm Arlanda Reykjavik Keflavik Intl

08:40 - 19:25SEA Seattle/Tacoma Intl-BFS Belfast Intl

26h 45m3 stops Vancouver Intl Frankfurt am Main Malaga

£1,081Multiple Airlines

Fri, 13 Nov - Fri, 20 Nov

06:30 - 17:00BFS Belfast Intl-SEA Seattle/Tacoma Intl

18h 30m2 stops London Gatwick Reykjavik Keflavik Intl

08:40 - 19:25SEA Seattle/Tacoma Intl-BFS Belfast Intl

26h 45m3 stops Vancouver Intl Frankfurt am Main Malaga

£1,091Multiple Airlines

Fri, 13 Nov - Fri, 20 Nov

06:30 - 17:00BFS Belfast Intl-SEA Seattle/Tacoma Intl

18h 30m2 stops London Gatwick Reykjavik Keflavik Intl

07:45 - 12:30SEA Seattle/Tacoma Intl-BFS Belfast Intl

20h 45m2 stops Toronto Pearson Intl Manchester

£1,112Multiple Airlines

Fri, 13 Nov - Fri, 20 Nov

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Thu 26/11

06:30-15:55

2 stops17h 25m

Seattle/Tacoma Intl

Thu 3/12

17:50-20:30

2 stops18h 40m

£687

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Thu 26/11

06:30-15:55

2 stops17h 25m

Seattle/Tacoma Intl

Thu 3/12

14:35-22:15

3 stops23h 40m

£849

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Thu 26/11

08:50-09:27

3 stops32h 37m

Seattle/Tacoma Intl

Thu 3/12

14:35-22:15

3 stops23h 40m

£855

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Fri 13/11

19:20-17:00

3 stops29h 40m

Seattle/Tacoma Intl

Fri 20/11

08:40-19:25

3 stops26h 45m

£1,081

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Fri 13/11

06:30-17:00

2 stops18h 30m

Seattle/Tacoma Intl

Fri 20/11

08:40-19:25

3 stops26h 45m

£1,091

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Fri 13/11

06:30-17:00

2 stops18h 30m

Seattle/Tacoma Intl

Fri 20/11

07:45-12:30

2 stops20h 45m

£1,112

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

Cheap Belfast Intl Airport to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Belfast Intl Airport to State of Washington

Best price found	£687
Fastest flight time	13h 45m
Direct flights	None

The best flight deal from Belfast Intl Airport to State of Washington found on momondo in the last 72 hours is £687

The fastest flight from Belfast Intl Airport to State of Washington takes 13h 45m

There are no direct flights from Belfast Intl Airport to State of Washington. There are no popular flight routes from Belfast Intl Airport to State of Washington.

Search flight deals

Frequently asked questions about flying from Belfast Intl Airport to Washington

When did momondo last update prices for flights from Belfast Intl Airport to Washington?
Prices for flights from Belfast Intl Airport to Washington refresh daily.
How old do you have to be to fly from Belfast Intl Airport to Washington?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Belfast Intl Airport to Washington.
What documentation or ID do you need to fly to Washington?
The necessary travel and health documents for your Washington trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Belfast Intl Airport to Washington

How do I get Price Alerts for flights from Belfast Intl Airport to State of Washington?
Price Alerts will notify you by email when the price for flights to State of Washington from Belfast Intl Airport decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.
How can I save money on flights from Belfast Intl Airport to State of Washington with momondo?
Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.
How does momondo find its flight prices?
momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Why use momondo?

Why should I use momondo to find a flight deal from Belfast to Washington?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington from Belfast.

Can I find flights from Belfast to Washington with flexible booking policies on momondo?

Flights from Belfast to Washington with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Belfast to Washington?

Once you have performed a search for Belfast to Washington flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Belfast to Washington right now. Can momondo alert me if prices change?

Price alerts on flights to Washington from Belfast are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.