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 round-trip 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>

$635 CHEAP FLIGHTS from Washington to Belfast

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

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Cheapest round-trip

$635

Multiple Airlines

Tue 2/3Tue 2/10

SEA - BFS • 2 stops

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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 round-trip 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

Recent round-trip flight deals from Washington to Belfast

Tue, Feb 3 - Tue, Feb 10

2:35 pm - 1:25 pm

SEA

BFS

14h 50m2 stops

6:30 am - 5:00 pm

BFS

SEA

18h 30m2 stops

$635Multiple Airlines

Sat, Mar 7 - Tue, Mar 17

3:05 pm - 9:00 pm

SEA

BHD

21h 55m1 stop

6:30 am - 12:35 pm

BHD

SEA

13h 05m1 stop

$646Delta

Sat, Mar 7 - Tue, Mar 17

7:10 am - 4:50 pm

SEA

BHD

25h 40m2 stops

6:30 am - 12:35 pm

BHD

SEA

13h 05m1 stop

$651Delta

Sat, Mar 7 - Wed, Mar 18

3:05 pm - 9:00 pm

SEA

BHD

21h 55m1 stop

6:30 am - 7:48 pm

BHD

SEA

20h 18m2 stops

$656Delta

Wed, Apr 1 - Wed, Apr 8

5:30 pm - 4:55 pm

SEA

BHD

15h 25m1 stop

5:30 pm - 4:30 pm

BHD

SEA

31h 00m1 stop

$660KLM

Sat, Mar 7 - Tue, Mar 17

7:10 am - 4:50 pm

SEA

BHD

25h 40m2 stops

6:30 am - 7:04 pm

BHD

SEA

19h 34m2 stops

$661Delta

Wed, Apr 1 - Wed, Apr 8

5:30 pm - 4:55 pm

SEA

BHD

15h 25m1 stop

9:50 am - 12:03 am

BHD

SEA

22h 13m2 stops

$670KLM

Fri, Jan 16 - Sun, Jan 25

1:25 pm - 4:50 pm

PDX

BHD

19h 25m1 stop

5:20 pm - 5:35 pm

BHD

PDX

32h 15m2 stops

$709Multiple Airlines

Wed, Apr 1 - Wed, Apr 8

7:15 am - 11:55 am

SEA

BHD

20h 40m2 stops

6:50 am - 9:46 pm

BHD

SEA

22h 56m2 stops

$711British Airways

Thu, Apr 30 - Sat, May 9

8:20 pm - 8:45 pm

SEA

BHD

16h 25m1 stop

7:05 am - 11:35 am

BHD

SEA

12h 30m1 stop

$753British Airways

Useful Info

Cheapest flight	$635

Flight from Seattle to Belfast Intl Airport

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 round-trip 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

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Origins

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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

$635 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 round-trip flight deals from Washington to Belfast

Good to know

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 round-trip 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 rental

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