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>

$650 CHEAP FLIGHTS from Washington to Belfast

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

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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 24 - Tue, Mar 3

2:35 pm - 5:55 pmSEA-BFS

19h 20m2 stops

6:30 am - 5:00 pmBFS-SEA

18h 30m2 stops

$649Multiple Airlines

Find Deal

Wed, Dec 3 - Sun, Dec 7

7:20 am - 9:00 pmSEA-BHD

29h 40m2 stops

6:30 am - 3:35 pmBHD-SEA

17h 05m2 stops

$650Virgin Atlantic

Find Deal

Mon, Jan 5 - Mon, Jan 12

5:45 pm - 4:05 pmPDX-BHD

14h 20m1 stop

6:35 am - 3:55 pmBHD-PDX

17h 20m1 stop

$674British Airways

Find Deal

Wed, Dec 3 - Wed, Dec 10

5:45 pm - 2:15 pmPDX-BHD

12h 30m1 stop

11:25 am - 11:23 pmBHD-PDX

19h 58m2 stops

$677British Airways

Find Deal

Wed, Dec 3 - Wed, Dec 10

1:25 pm - 9:00 pmPDX-BHD

23h 35m1 stop

6:30 am - 11:25 amBHD-PDX

12h 55m1 stop

$684Delta

Find Deal

Wed, Dec 3 - Sun, Dec 7

7:20 am - 9:00 pmSEA-BHD

29h 40m2 stops

6:30 am - 11:50 amBHD-SEA

13h 20m1 stop

$688Virgin Atlantic

Find Deal

Wed, Dec 3 - Sun, Dec 7

7:20 am - 9:00 pmSEA-BHD

29h 40m2 stops

6:30 am - 3:35 pmBHD-SEA

17h 05m2 stops

$698Virgin Atlantic

Find Deal

Sun, Apr 19 - Sat, May 2

3:18 pm - 6:45 pmPDX-BHD

19h 27m2 stops

7:05 am - 7:21 pmBHD-PDX

20h 16m2 stops

$724American Airlines

Find Deal

Wed, Dec 3 - Sun, Dec 7

3:05 pm - 4:50 pmSEA-BHD

17h 45m1 stop

5:20 pm - 11:50 amBHD-SEA

26h 30m1 stop

$755Delta

Find Deal

Fri, Mar 27 - Tue, Mar 31

7:50 pm - 5:15 pmSEA-BHD

14h 25m1 stop

6:35 am - 11:08 pmBHD-SEA

24h 33m2 stops

$981American Airlines

Find Deal

Cheapest round-trip

$649

Typical prices: $764-$888

Multiple Airlines

Tue 2/24Tue 3/3

SEA - BFS • 2 stops

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Belfast!

Useful Info

Cheapest flight	$649

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

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Complete your trip

Direct Flights

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Cabin class types available on flights to Washington

First Class flights to Belfast

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Prem Econ Class flights to Belfast

Economy Class flights to Belfast

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.

$650 Find Cheap Flights from Washington to Belfast

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

Cheap Flights from Washington to Belfast

Recent round-trip flight deals from Washington to Belfast

Everything you should know

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