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

You can take advantage of momondo’s Price Alerts by first searching for your flights to State of Washington from Belfast Intl Airport . Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

How does momondo find its flight prices?

We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

When did momondo last update prices for flights from Washington to Belfast Intl Airport?

Prices for flights from Washington to Belfast Intl Airport refresh daily.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Belfast Intl Airport.

What documentation or ID do you need to fly to Belfast Intl Airport?

The travel and health documents required for your trip to Belfast Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Belfast Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£210 Cheap Flights from State of Washington to Belfast Intl Airport in 2026

Find the cheapest flights from Washington to Belfast

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

19:00 - 21:05SEA Seattle/Tacoma Intl-BFS Belfast Intl

18h 05m2 stops Reykjavik Keflavik Intl London Gatwick

08:20 - 20:40BFS Belfast Intl-SEA Seattle/Tacoma Intl

20h 20m2 stops London Gatwick Reykjavik Keflavik Intl

£672Multiple Airlines

Tue, 22 Sep - Tue, 29 Sep

19:00 - 23:20SEA Seattle/Tacoma Intl-BFS Belfast Intl

20h 20m3 stops Reykjavik Keflavik Intl Glasgow Intl London Luton

06:15 - 20:40BFS Belfast Intl-SEA Seattle/Tacoma Intl

22h 25m2 stops London Gatwick Reykjavik Keflavik Intl

£709Multiple Airlines

Tue, 22 Sep - Tue, 29 Sep

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

16h 20m2 stops Reykjavik Keflavik Intl London Gatwick

06:10 - 20:40BFS Belfast Intl-SEA Seattle/Tacoma Intl

22h 30m2 stops London Gatwick Reykjavik Keflavik Intl

£750Multiple Airlines

Thu, 24 Sep - Thu, 1 Oct

19:00 - 23:20SEA Seattle/Tacoma Intl-BFS Belfast Intl

20h 20m3 stops Reykjavik Keflavik Intl Glasgow Intl London Stansted

06:15 - 18:32BFS Belfast Intl-SEA Seattle/Tacoma Intl

20h 17m3 stops London Gatwick Zurich Vancouver Intl

£756Multiple Airlines

Tue, 22 Sep - Tue, 29 Sep

19:00 - 21:45SEA Seattle/Tacoma Intl-BFS Belfast Intl

18h 45m2 stops Reykjavik Keflavik Intl Edinburgh Turnhouse

17:15 - 17:55BFS Belfast Intl-SEA Seattle/Tacoma Intl

32h 40m3 stops London Stansted Stockholm Arlanda Reykjavik Keflavik Intl

£770Multiple Airlines

Thu, 24 Sep - Thu, 1 Oct

19:00 - 21:30SEA Seattle/Tacoma Intl-BFS Belfast Intl

18h 30m2 stops Reykjavik Keflavik Intl Edinburgh Turnhouse

08:15 - 18:45BFS Belfast Intl-SEA Seattle/Tacoma Intl

42h 30m3 stops London Gatwick Toronto Pearson Intl Calgary

£779Multiple Airlines

Sat, 5 Sep - Mon, 21 Sep

07:00 - 13:55SEA Seattle/Tacoma Intl-BFS Belfast Intl

22h 55m3 stops Calgary Halifax Intl Amsterdam Schiphol

21:10 - 09:40BFS Belfast Intl-SEA Seattle/Tacoma Intl

44h 30m3 stops London Gatwick Toronto Pearson Intl Calgary

£808Multiple Airlines

Sun, 6 Sep - Sun, 13 Sep

15:40 - 21:30SEA Seattle/Tacoma Intl-BFS Belfast Intl

21h 50m2 stops Reykjavik Keflavik Intl Manchester

21:10 - 09:40BFS Belfast Intl-SEA Seattle/Tacoma Intl

44h 30m3 stops London Gatwick Toronto Pearson Intl Calgary

£817Multiple Airlines

Sun, 6 Sep - Sun, 13 Sep

14:30 - 22:50PDX Portland-BFS Belfast Intl

24h 20m2 stops Calgary Paris Charles de Gaulle

06:15 - 09:31BFS Belfast Intl-PDX Portland

35h 16m3 stops Paris Charles de Gaulle Calgary Vancouver Intl

£833Multiple Airlines

Thu, 10 Sep - Wed, 16 Sep

15:30 - 22:25PDX Portland-BFS Belfast Intl

22h 55m2 stops Reykjavik Keflavik Intl Amsterdam Schiphol

20:40 - 17:55BFS Belfast Intl-PDX Portland

29h 15m3 stops London Stansted Stockholm Arlanda Reykjavik Keflavik Intl

£857Multiple Airlines

Thu, 10 Sep - Thu, 24 Sep

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Tue 22/9

19:00-21:05

2 stops18h 05m

Belfast Intl

Tue 29/9

08:20-20:40

2 stops20h 20m

£672

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Tue 22/9

19:00-23:20

3 stops20h 20m

Belfast Intl

Tue 29/9

06:15-20:40

2 stops22h 25m

£709

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Thu 24/9

19:00-19:20

2 stops16h 20m

Belfast Intl

Thu 1/10

06:10-20:40

2 stops22h 30m

£750

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Tue 22/9

19:00-23:20

3 stops20h 20m

Belfast Intl

Tue 29/9

06:15-18:32

3 stops20h 17m

£756

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Thu 24/9

19:00-21:45

2 stops18h 45m

Belfast Intl

Thu 1/10

17:15-17:55

3 stops32h 40m

£770

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sat 5/9

19:00-21:30

2 stops18h 30m

Belfast Intl

Mon 21/9

08:15-18:45

3 stops42h 30m

£779

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sun 6/9

07:00-13:55

3 stops22h 55m

Belfast Intl

Sun 13/9

21:10-09:40

3 stops44h 30m

£808

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sun 6/9

15:40-21:30

2 stops21h 50m

Belfast Intl

Sun 13/9

21:10-09:40

3 stops44h 30m

£817

PortlandBelfast

PDX Portland - BFS Belfast Intl

PDXBFS

Portland

Thu 10/9

14:30-22:50

2 stops24h 20m

Belfast Intl

Wed 16/9

06:15-09:31

3 stops35h 16m

£833

PortlandBelfast

PDX Portland - BFS Belfast Intl

PDXBFS

Portland

Thu 10/9

15:30-22:25

2 stops22h 55m

Belfast Intl

Thu 24/9

20:40-17:55

3 stops29h 15m

£857

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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

Fastest flight time	12h 30m
Direct flights	None

The fastest flight from State of Washington to Belfast Intl Airport takes 12h 30m

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

Search flight deals

Frequently asked questions about flying from Washington to Belfast Intl Airport

When did momondo last update prices for flights from Washington to Belfast Intl Airport?
Prices for flights from Washington to Belfast Intl Airport refresh daily.
How old do you have to be to fly from Washington to Belfast Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington to Belfast Intl Airport.
What documentation or ID do you need to fly to Belfast Intl Airport?
The travel and health documents required for your trip to Belfast Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Belfast Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Frequently asked questions about flying from Washington to Belfast Intl Airport

How do I get Price Alerts for flights from State of Washington to Belfast Intl Airport?
You can take advantage of momondo’s Price Alerts by first searching for your flights to State of Washington from Belfast Intl Airport. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.
How can I save money on flights from State of Washington to Belfast Intl Airport 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?
We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Ballymena

Newry

Armagh

Cookstown

Portadown

Dungannon

Why use momondo?

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

It is quick and easy to find Washington to Belfast flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Belfast that suits you.

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

All flight searches from Washington to Belfast on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Washington and Belfast by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Belfast, momondo offers a useful price alert feature which will track prices for flights to Belfast from Washington and alert you when they change.