£398 Find Cheap Flights from Belfast 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 to Washington departing on 29/10. 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
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 27% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

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

Flight Deals
Booking Insights
Flight Deals

Book Cheap Belfast 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 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 to Washington

Tue, 15 Sep - Tue, 6 Oct
British Airways Logo
09:40 - 21:36
BHD
-
SEA
19h 56m
2 stops
British Airways Logo
20:20 - 17:35
SEA
-
BHD
13h 15m
1 stop
£578British Airways
Tue, 15 Sep - Tue, 6 Oct
British Airways Logo
09:40 - 21:36
BHD
-
SEA
19h 56m
2 stops
British Airways Logo
20:20 - 17:35
SEA
-
BHD
13h 15m
1 stop
£579British Airways
Tue, 15 Sep - Tue, 6 Oct
British Airways Logo
09:40 - 21:36
BHD
-
SEA
19h 56m
2 stops
British Airways Logo
12:00 - 15:20
SEA
-
BHD
19h 20m
2 stops
£585British Airways
Tue, 15 Sep - Tue, 6 Oct
British Airways Logo
09:40 - 21:36
BHD
-
SEA
19h 56m
2 stops
British Airways Logo
12:00 - 15:20
SEA
-
BHD
19h 20m
2 stops
£586British Airways
Mon, 7 Sep - Mon, 28 Sep
British Airways Logo
15:20 - 11:35
BHD
-
SEA
28h 15m
1 stop
British Airways Logo
17:40 - 18:45
SEA
-
BHD
17h 05m
2 stops
£593British Airways
Mon, 7 Sep - Mon, 28 Sep
British Airways Logo
15:20 - 11:35
BHD
-
SEA
28h 15m
1 stop
British Airways Logo
17:40 - 20:35
SEA
-
BHD
18h 55m
2 stops
£596British Airways
Tue, 15 Sep - Tue, 6 Oct
KLM Logo
17:30 - 16:35
BHD
-
SEA
31h 05m
1 stop
KLM Logo
17:45 - 16:55
SEA
-
BHD
15h 10m
1 stop
£597KLM
Mon, 7 Sep - Mon, 28 Sep
British Airways Logo
06:30 - 17:10
BHD
-
SEA
18h 40m
2 stops
British Airways Logo
17:40 - 20:35
SEA
-
BHD
18h 55m
2 stops
£598British Airways
Mon, 7 Sep - Mon, 28 Sep
British Airways Logo
06:30 - 17:10
BHD
-
SEA
18h 40m
2 stops
British Airways Logo
17:40 - 19:25
SEA
-
BHD
17h 45m
2 stops
£600British Airways
Mon, 7 Sep - Mon, 28 Sep
Multiple Airlines Logo
19:35 - 11:35
BHD
-
SEA
24h 00m
1 stop
Multiple Airlines Logo
13:30 - 12:55
SEA
-
BHD
15h 25m
1 stop
£603Multiple Airlines
Booking Insights

KAYAK's insights & trends for Belfast to Washington flights

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

How long does a flight from Belfast to Washington take?

The duration of a flight to Washington depends on your arrival airport. The shortest route to Washington from Belfast is to Seattle, which takes 13h 05m.

Good to know - Cheap tickets from Belfast to Washington

Cheapest flight£398
Flight from Belfast Intl Airport to Seattle

FAQs - booking Washington flights

  • How does KAYAK find such low prices on flights from Belfast 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 to Washington.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Belfast 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 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 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 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 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 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 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 11645 reviews
7.2Comfort
7.9Crew
6.4Food
6.9Entertainment
7.5Boarding
Airline reviews

The Charleston, WV airport was cute. Very good staff and small enough to feel comfortable. The plane had more leg room than bigger planes. Much more comfortable.

8.0 ExcellentSharon, Jun 2026
CRW - CLT
Read more American Airlines reviews

The Charleston, WV airport was cute. Very good staff and small enough to feel comfortable. The plane had more leg room than bigger planes. Much more comfortable.

Another uncoordinated American experience. Always surprises me at DFW for them of all places. Have to take this flight as there are no other good time options. We knew from the start that something was wrong, but the pilot wouldn't tell us. I just watched my Kayak app grow the delay by 10 minutes as it went to 3.5 hours. They were uncoordinated with maintenance (as maintenance, when finally arriving, knew within 15 minutes the plane wasn't going. No 'sorry' or 'this is what is going on' comment. The pilot seemed unfazed / didn't care about the process we were going through.

The seats. The seat in front of me was awful and when the guy sat down, it flew back and hit my head when I was putting my backpack under the seat, It didn't make for a pleasant experience,

Very hard to beat a British Airways international flight…the crews are always so amazing! One flight attendant that really stood out was Emma…she was very personable and accommodating with any request we had!!

The passport line was so long that many of us were concerned about missing our flight and some did. It would've helped if a AA representative had gone to the passport check-in sooner to advise that boarding was closing and those flying that were stuck back in the line, needed to come forward with apologies to others. An AA representative did do that but only after boarding had already closed. (They delayed take-off so that more who were running with carry-ons could get to the gate - especially stressful for older people!) Then to be crammed into a seat with barely enough leg room for a thin woman, 5'7", like me, much less for a taller, bigger person was not comfortable, especially if the person in front decided to lean back. Crew was fine, food and entertainment also.

The seat when "flat" was not flat and pad was too thin to cover it.

Awful customer service, horrible experience. We travel a lot domestic & international- worst flights to/from ever. Brief bkgd as Inhate to relive this experience: booked and chose 2 seats 4 months prior in Premium Economy - last row end seats close to bathroom, no one behind us, plenty of legroom;, underwear storage — flown this was on other airlines, love it. We receive notice 4 days before scheduled overseas flight - plane has changed, new seats assigned. Seats are split into single seats, opposites of the plane, FRONT Row so no reachable storage. Called BOTH British Air & America. American “switched planes and the seats you want are taken;” British Air “Yes, we’ll be glad to accommodate you (type type type). Just ask at the Gate and someone will give you new boarding passes with seats together in middle, OK?” — OK. —At Gate the attendant looks us up saying “No, it is an overbooked flight and yours are the only seats available.” But but but wait, “We were TOLD our seats had been switched and seated together?” Gate attendant “Well they were wrong and don’t change your seats. Your original seats are where you’ll sit.”. Right. No help WHATSOEVER. We sit opposite on way there, wife VERY disgruntled, a Tol 5 worst ways to start a 3-week bus tour of UK. We promise to NEVER FLY AMERICAN OR BROTISH AIR EVER, and we have 3 more extensive trips planned..

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

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.

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

Cabin class types available on flights to Washington

Cabin classes available on flights to Washington. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.