£388 Find Cheap Flights from Belfast Intl Airport to Washington

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Belfast Intl to Washington departing on 25/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Belfast to Washington, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Belfast to Washington, as well as popular online travel agencies
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Flight Deals

Book Cheap Belfast Intl to Washington Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Belfast Intl to Washington 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.

Recent return flight deals from Belfast Intl to Washington

Tue, 1 Sep - Tue, 22 Sep
Multiple Airlines Logo
07:15 - 17:55
BFS
-
SEA
18h 40m
2 stops
Multiple Airlines Logo
19:00 - 16:20
SEA
-
BFS
13h 20m
2 stops
£724Multiple Airlines
Tue, 1 Sep - Tue, 22 Sep
Multiple Airlines Logo
06:15 - 17:55
BFS
-
SEA
19h 40m
2 stops
Multiple Airlines Logo
15:40 - 23:20
SEA
-
BFS
23h 40m
3 stops
£742Multiple Airlines
Tue, 1 Sep - Tue, 22 Sep
Multiple Airlines Logo
20:15 - 17:55
BFS
-
SEA
29h 40m
3 stops
Multiple Airlines Logo
15:40 - 23:20
SEA
-
BFS
23h 40m
3 stops
£768Multiple Airlines
Booking Insights

KAYAK's insights & trends for Belfast Intl to Washington flights

Get data-powered insights and trends into flights from Belfast Intl to Washington to help you find the cheapest flights, the best time to fly and much more.

How long does a flight from Belfast Intl Airport to Washington take?

The duration of a flight to Washington depends on your arrival airport. The shortest route to Washington from Belfast Intl Airport is to Seattle, which takes 22h 10m.

Good to know - Cheap tickets from Belfast Intl Airport to Washington

Cheapest flight£388
Flight from Belfast Intl Airport to Seattle

FAQs - booking Washington flights

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

    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 Belfast Intl Airport to Washington.

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

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

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

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

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

    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 from Belfast Intl Airport to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Belfast Intl to Washington

 
See real verified KAYAK customer reviews for airlines flying from Belfast to Washington. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Belfast Intl to Washington? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11673 reviews
7.2Comfort
7.5Boarding
6.9Entertainment
6.4Food
7.9Crew
Airline reviews

They lost my bag. ... And I asked them 3 times to 3 different people if my checked bag will maKe it all the way - they all confirmed and at the end it was left at the connection... Bravo

2.0 MediocreAnonymous, May 2026
LHR - MIA
Read more American Airlines reviews

They lost my bag. ... And I asked them 3 times to 3 different people if my checked bag will maKe it all the way - they all confirmed and at the end it was left at the connection... Bravo

Cancelled BOYH legs of our flight home 30 min before initial boarding

Cancelled the flight half hour before boarding. Then cancelled the connecting flight too.

Delayed due to weather in Dallas (arriving flight arrived late), then boarded the plane only to deboard immediately afterwards, tire needed to be replaced. Flight supposed to depart at 6:15pm but departed at 9:35pm.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

British Airways is an excellent airline. Comfort, food and airline personnel.

Older airplane with worn out seats. No entertainment system at all. Connecting to Wi-Fi was problematic and hit and miss.

An delay of almost 3 hours while passengers were already in the plane kept us very uncomfortable. The food was also very limited. A bad experience overall.

I understand that there is a catering issue - water should be the minimum stock. During the flight, not once that the attendants came through with water. The conversations in the kitchen were very loud and they were swearing. I do not expect any white glove service, at the minimum, we should be cordial. It was almost an inconveniece that we were on the flight. And it made us feel if you even dare question us, we'll make you deplane.

Everything you need to know for your flight from Belfast Intl to Washington

Information on your arrival and departure airports