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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

£187 CHEAP FLIGHTS from Washington to Belfast

KAYAK searches hundreds of travel sites at once for deals on flights to Belfast

...and more

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest return fare

£429

British Airways

Mon 16/3Mon 23/3

SEA - BHD • 1 stop

Cheapest one-way flight

£187

Air France

Wed 8/7

SEA - BHD • 1 stop

Start a new search

KAYAK searches hundreds of sites at once to find you the best travel deals.

We hope you love your trip to Belfast!

Flight Deals

Cheap Flights from Washington to Belfast

Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Washington to Belfast that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

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

Round-trip

One-way

Recent return flight deals from Washington to Belfast

Mon, 16 Mar - Mon, 23 Mar

19:50 - 16:05

SEA

BHD

13h 15m

1 stop

19:25 - 12:30

BHD

SEA

24h 05m

1 stop

£429British Airways

Mon, 16 Mar - Mon, 23 Mar

13:37 - 18:35

SEA

BHD

21h 58m

2 stops

19:25 - 12:30

BHD

SEA

24h 05m

1 stop

£432British Airways

Sat, 7 Mar - Tue, 17 Mar

18:50 - 19:40

SEA

BHD

16h 50m

1 stop

08:45 - 17:55

BHD

SEA

16h 10m

1 stop

£432British Airways

Sat, 7 Mar - Tue, 17 Mar

13:35 - 14:15

SEA

BHD

16h 40m

1 stop

10:00 - 17:55

BHD

SEA

14h 55m

1 stop

£435British Airways

Sat, 7 Mar - Tue, 17 Mar

18:50 - 19:40

SEA

BHD

16h 50m

1 stop

11:25 - 00:24

BHD

SEA

19h 59m

2 stops

£438British Airways

Sat, 7 Mar - Wed, 18 Mar

18:50 - 16:45

SEA

BHD

13h 55m

1 stop

11:25 - 00:24

BHD

SEA

19h 59m

2 stops

£440British Airways

Sat, 7 Mar - Tue, 17 Mar

18:50 - 16:45

SEA

BHD

13h 55m

1 stop

11:25 - 17:55

BHD

SEA

13h 30m

1 stop

£444British Airways

Wed, 4 Mar - Sun, 8 Mar

17:45 - 14:15

PDX

BHD

12h 30m

1 stop

06:30 - 15:55

BHD

PDX

17h 25m

1 stop

£447British Airways

Tue, 17 Mar - Tue, 31 Mar

23:15 - 16:50

PDX

BHD

34h 35m

2 stops

17:30 - 11:10

BHD

PDX

25h 40m

1 stop

£521Delta

Fri, 15 May - Mon, 25 May

19:00 - 20:40

SEA

BFS

41h 40m

2 stops

09:15 - 18:50

BFS

SEA

17h 35m

1 stop

£687Multiple Airlines

Useful Info

Cheapest flight	£187

Flight from Seattle to Belfast

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.

Everything you need to know for your flight to Belfast

Cabin class

Complete your trip

Direct flights

Flights to other cities

Origins

Other airports

Return flight deals

Cabin class types available on flights to Washington

First Class flights to Belfast

Business Class flights to Belfast

Prem Econ Class flights to Belfast

Economy class flights to Belfast

£187 Find Cheap Flights from Washington to Belfast

KAYAK searches hundreds of travel sites at once for deals on flights to Belfast

Everything you should know

Cheap Flights from Washington to Belfast

Recent return flight deals from Washington to Belfast

Recent one-way flight deals from Washington to Belfast

Good to know - Cheap tickets from Washington to Belfast

FAQs for booking flights from Washington to Belfast

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.

Everything you need to know for your flight to Belfast

Cabin class types available on flights to Washington

Complete your trip to Belfast with a hotel stay or car hire

Find direct flights for Belfast

Flights to other popular destinations

Flights from domestic origins to Belfast

Choose which airport to fly into in Belfast

Find deals for your return flight