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.

$346 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.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Washington to Belfast

Mon, Oct 5 - Thu, Oct 22

6:00 am - 9:20 amSEA Seattle/Tacoma Intl-BHD Belfast City

19h 20m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol

9:50 am - 10:49 pmBHD Belfast City-SEA Seattle/Tacoma Intl

20h 59m2 stops Amsterdam Schiphol Boston Logan Intl

$832Delta

Fri, Oct 16 - Fri, Oct 23

5:45 pm - 4:55 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 10m1 stop Amsterdam Schiphol

9:50 am - 4:35 pmBHD Belfast City-SEA Seattle/Tacoma Intl

14h 45m1 stop Amsterdam Schiphol

$870KLM

Mon, Oct 5 - Thu, Oct 22

8:20 pm - 7:25 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 05m1 stop London Heathrow

12:45 pm - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

$905British Airways

Mon, Oct 5 - Thu, Oct 22

1:30 pm - 12:55 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 25m1 stop London Heathrow

12:45 pm - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

$906British Airways

Mon, Oct 5 - Thu, Oct 22

1:30 pm - 12:55 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 25m1 stop London Heathrow

12:45 pm - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

$907British Airways

Sun, Jan 17 - Thu, Jan 21

6:45 pm - 4:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

14h 05m1 stop London Heathrow

11:05 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 45m1 stop London Heathrow

$917British Airways

Mon, Feb 15 - Fri, Feb 19

5:45 pm - 5:25 pmPDX Portland-BHD Belfast City

15h 40m1 stop London Heathrow

6:45 am - 3:50 pmBHD Belfast City-PDX Portland

17h 05m1 stop London Heathrow

$917British Airways

Mon, Feb 1 - Fri, Feb 5

5:45 pm - 4:05 pmPDX Portland-BHD Belfast City

14h 20m1 stop London Heathrow

6:45 am - 3:50 pmBHD Belfast City-PDX Portland

17h 05m1 stop London Heathrow

$917British Airways

Sun, Jan 17 - Thu, Jan 21

6:45 pm - 4:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

14h 05m1 stop London Heathrow

11:05 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 45m1 stop London Heathrow

$918British Airways

Mon, Feb 15 - Fri, Feb 19

5:45 pm - 4:05 pmPDX Portland-BHD Belfast City

14h 20m1 stop London Heathrow

6:45 am - 3:50 pmBHD Belfast City-PDX Portland

17h 05m1 stop London Heathrow

$918British Airways

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 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.