How does KAYAK find such low prices on flights from Washington to Belfast?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Belfast.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Belfast?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast from Washington is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Washington to Belfast?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Belfast with an airline and back to Washington with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Belfast?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Belfast from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

£236 CHEAP FLIGHTS from Washington to Belfast

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Flight Deals

Cheap Flights from Washington to Belfast

Discover the best prices for you by selecting your travel dates on KAYAK.

Return

One-way

Last minute

Recent return flight deals from Washington to Belfast

Mon, 28 Sep - Mon, 12 Oct

22:40 - 09:20SEA Seattle/Tacoma Intl-BHD Belfast City

26h 40m2 stops New York John F Kennedy Intl Amsterdam Schiphol

17:30 - 11:52BHD Belfast City-SEA Seattle/Tacoma Intl

26h 22m1 stop Amsterdam Schiphol

£609Delta

Mon, 5 Oct - Thu, 22 Oct

07:15 - 09:20SEA Seattle/Tacoma Intl-BHD Belfast City

18h 05m2 stops New York John F Kennedy Intl Amsterdam Schiphol

17:30 - 11:52BHD Belfast City-SEA Seattle/Tacoma Intl

26h 22m1 stop Amsterdam Schiphol

£612KLM

Mon, 28 Sep - Mon, 12 Oct

22:40 - 09:20SEA Seattle/Tacoma Intl-BHD Belfast City

26h 40m2 stops New York John F Kennedy Intl Amsterdam Schiphol

17:30 - 23:04BHD Belfast City-SEA Seattle/Tacoma Intl

37h 34m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£613Delta

Tue, 5 Jan - Mon, 11 Jan

14:25 - 16:50SEA Seattle/Tacoma Intl-BHD Belfast City

18h 25m1 stop Amsterdam Schiphol

17:20 - 11:50BHD Belfast City-SEA Seattle/Tacoma Intl

26h 30m1 stop Amsterdam Schiphol

£616KLM

Tue, 5 Jan - Thu, 14 Jan

14:25 - 16:50SEA Seattle/Tacoma Intl-BHD Belfast City

18h 25m1 stop Amsterdam Schiphol

09:40 - 22:05BHD Belfast City-SEA Seattle/Tacoma Intl

20h 25m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

£623KLM

Tue, 5 Jan - Mon, 11 Jan

14:35 - 16:10SEA Seattle/Tacoma Intl-BFS Belfast Intl

17h 35m2 stops Reykjavik Keflavik Intl Manchester

14:00 - 17:00BFS Belfast Intl-SEA Seattle/Tacoma Intl

35h 00m2 stops London Stansted Reykjavik Keflavik Intl

£625Multiple Airlines

Tue, 5 Jan - Mon, 11 Jan

06:00 - 16:50SEA Seattle/Tacoma Intl-BHD Belfast City

26h 50m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol

17:20 - 16:59BHD Belfast City-SEA Seattle/Tacoma Intl

31h 39m2 stops Amsterdam Schiphol Los Angeles

£626Virgin Atlantic

Tue, 5 Jan - Mon, 11 Jan

18:50 - 20:40SEA Seattle/Tacoma Intl-BFS Belfast Intl

17h 50m1 stop London Heathrow

14:00 - 17:00BFS Belfast Intl-SEA Seattle/Tacoma Intl

35h 00m2 stops London Stansted Reykjavik Keflavik Intl

£640Multiple Airlines

Sun, 1 Nov - Sat, 7 Nov

13:40 - 16:45PDX Portland-BHD Belfast City

19h 05m1 stop Amsterdam Schiphol

17:15 - 11:40BHD Belfast City-PDX Portland

26h 25m1 stop Amsterdam Schiphol

£646Multiple Airlines

Sat, 12 Dec - Wed, 16 Dec

14:35 - 21:35SEA Seattle/Tacoma Intl-BFS Belfast Intl

23h 00m2 stops Reykjavik Keflavik Intl Manchester

08:30 - 17:00BFS Belfast Intl-SEA Seattle/Tacoma Intl

16h 30m2 stops London Gatwick Reykjavik Keflavik Intl

£649Multiple Airlines

Recent last minute flight deals from Washington to Belfast

Sun, 20 Sep - Wed, 23 Sep

15:55 - 08:05SEA Seattle/Tacoma Intl-BFS Belfast Intl

32h 10m2 stops Kastrup Copenhagen Edinburgh Turnhouse

20:15 - 19:00BFS Belfast Intl-SEA Seattle/Tacoma Intl

30h 45m1 stop London Stansted

£676Multiple Airlines

Sun, 20 Sep - Wed, 23 Sep

15:55 - 13:50SEA Seattle/Tacoma Intl-BHD Belfast City

37h 55m2 stops Kastrup Copenhagen Manchester

18:50 - 19:00BHD Belfast City-SEA Seattle/Tacoma Intl

32h 10m1 stop London Gatwick

£831Multiple Airlines

Mon, 21 Sep - Fri, 25 Sep

19:10 - 09:20SEA Seattle/Tacoma Intl-BHD Belfast City

30h 10m2 stops Dublin Edinburgh Turnhouse

07:00 - 17:10BHD Belfast City-SEA Seattle/Tacoma Intl

18h 10m2 stops Manchester Dublin

£875Aer Lingus

Sun, 20 Sep - Wed, 23 Sep

15:55 - 13:50SEA Seattle/Tacoma Intl-BHD Belfast City

37h 55m2 stops Kastrup Copenhagen Manchester

07:00 - 19:00BHD Belfast City-SEA Seattle/Tacoma Intl

20h 00m1 stop London Gatwick

£880Multiple Airlines

Mon, 21 Sep - Wed, 23 Sep

19:10 - 09:20SEA Seattle/Tacoma Intl-BHD Belfast City

30h 10m2 stops Dublin Edinburgh Turnhouse

14:25 - 17:10BHD Belfast City-SEA Seattle/Tacoma Intl

34h 45m2 stops Manchester Dublin

£902Aer Lingus

Mon, 21 Sep - Fri, 25 Sep

15:40 - 21:05SEA Seattle/Tacoma Intl-BHD Belfast City

21h 25m3 stops Reykjavik Keflavik Intl Dublin Southampton Eastleigh

07:00 - 22:47BHD Belfast City-SEA Seattle/Tacoma Intl

23h 47m3 stops London Gatwick Montreal Pierre Elliott Trudeau Intl Vancouver Intl

£953Multiple Airlines

Mon, 21 Sep - Fri, 25 Sep

15:40 - 21:05SEA Seattle/Tacoma Intl-BHD Belfast City

21h 25m3 stops Reykjavik Keflavik Intl Dublin Manchester

07:00 - 18:45BHD Belfast City-SEA Seattle/Tacoma Intl

19h 45m3 stops Edinburgh Turnhouse Dublin Calgary

£964Multiple Airlines

Mon, 21 Sep - Fri, 25 Sep

15:40 - 16:30SEA Seattle/Tacoma Intl-BHD Belfast City

16h 50m2 stops Reykjavik Keflavik Intl Edinburgh Turnhouse

07:00 - 22:47BHD Belfast City-SEA Seattle/Tacoma Intl

23h 47m3 stops London Gatwick Montreal Pierre Elliott Trudeau Intl Vancouver Intl

£966Multiple Airlines

Mon, 21 Sep - Wed, 23 Sep

19:10 - 21:05SEA Seattle/Tacoma Intl-BHD Belfast City

17h 55m2 stops Dublin Southampton Eastleigh

18:50 - 19:00BHD Belfast City-SEA Seattle/Tacoma Intl

32h 10m1 stop London Gatwick

£981Multiple Airlines

Sun, 20 Sep - Wed, 23 Sep

15:55 - 18:25SEA Seattle/Tacoma Intl-BFS Belfast Intl

18h 30m3 stops Kastrup Copenhagen Stockholm Arlanda Edinburgh Turnhouse

14:35 - 17:55BFS Belfast Intl-SEA Seattle/Tacoma Intl

35h 20m2 stops London Gatwick Reykjavik Keflavik Intl

£995Multiple Airlines

Useful Info

How does KAYAK find such low prices on flights from Washington to Belfast?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Belfast.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Belfast?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast from Washington is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Washington to Belfast?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Belfast with an airline and back to Washington with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Belfast?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Belfast from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.