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Cheap flights from Belfast to Washington from £291

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
20 Apr — 27 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast to Washington

Enter your travel dates to find the best prices.

Cheapest flights from Belfast to Washington
Explore the most affordable flight options available from Belfast to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 March 2026.

Sat 2/520:15
BFS
-
SEA
3 stops45h 25m
Multiple Airlines
Sat 9/519:00
SEA
-
BFS
3 stops20h 25m
Multiple Airlines
Deal found 18/3£595
Wed 22/411:35
BHD
-
SEA
1 stop14h 50m
British Airways
Sun 26/411:16
SEA
-
BHD
2 stops19h 19m
British Airways
Deal found 16/3£702
Fri 11/906:30
BHD
-
SEA
2 stops18h 59m
British Airways
Mon 14/913:24
SEA
-
BHD
2 stops20h 06m
British Airways
Deal found 16/3£706
Wed 22/706:10
BFS
-
SEA
2 stops17h 30m
Multiple Airlines
Wed 29/717:40
SEA
-
BFS
2 stops19h 00m
Multiple Airlines
Deal found 18/3£976

Find flight deals from Belfast to Washington

Keep the following information in mind while searching for Belfast to Washington flight deals. Data was last updated 21 March 2026.

Round-trip from

£595

One-way from

£291
2/5-9/5
  • 2/5-9/5
  • 6 total stops
  • 65h 50m total
  • Belfast to Washington
Search Deals
2/5
  • 2/5
  • 3 total stops
  • 45h 25m total
  • Belfast to Washington
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast to Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 21 March 2026.
Use the filters below to find and compare flights from Belfast to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 2/5

20:15-09:40

3 stops45h 25m

Seattle/Tacoma Intl

Sat 9/5

19:00-23:25

3 stops20h 25m

£595

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 11/9

06:30-18:25

1 stop19h 55m

Seattle/Tacoma Intl

Mon 14/9

06:24-12:55

2 stops22h 31m

£702
Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 22/4

11:35-18:25

1 stop14h 50m

Seattle/Tacoma Intl

Sun 26/4

11:16-14:35

2 stops19h 19m

£702

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 22/7

13:45-21:07

3 stops39h 22m

Seattle/Tacoma Intl

Wed 29/7

18:50-19:15

2 stops16h 25m

£1,087
Cheapest one-way

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 2/5

20:15-09:40

3 stops45h 25m

£291

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sun 3/5

22:05-16:00

3 stops49h 55m

£316

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 3/5

20:10-10:36

3 stops46h 26m

£346

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 3/5

17:55-17:10

2 stops31h 15m

£574
Fastest single journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

19:35-17:10

2 stops29h 35m

£837

Flights are sorted by cheapest return flights first.

Deals found on 18/3

Sorted by cheapest first

Best time to book a flight from Belfast to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Belfast with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Belfast to Washington
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated 21 March 2026.
Check out reviews from past customers who have flown with American Airlines from Belfast to Washington to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,488 reviews
Check prices

Crew

7.9

Entertainment

6.9

Boarding

7.5

Food

6.4

Comfort

7.2

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes
American Airlines
7.1
Good
11,488 reviews
American Airlines
7.1
Good
11,488 reviews
Check prices

Crew

7.9

Entertainment

6.9

Boarding

7.5

Food

6.4

Comfort

7.2

Overall

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes

Related info for your journey

Find useful and relevant information for your journey from Belfast to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Belfast to State of Washington?

    There are many flights that can get you from Belfast to State of Washington in 14h 50m. Fly via British Airways to get the fastest option. There are 4472 mi between Belfast and State of Washington.

  • Can I find deals for flights from Belfast to Washington that include hotel bookings?

    Yes. In addition to deals on Belfast to Washington flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Belfast to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast to Washington.

  • Can I find deals for business class flights from Belfast to Washington?

    Yes. Cheapflights offers flight deals from Belfast to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Belfast to Washington

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Top airline flying from Belfast to Washington

Discover the top airline that operate flights from Belfast to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 21 March 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£561Average£561FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Belfast to Washington?

When you search for this flight from Belfast to Washington, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Belfast to Washington?

Millions of users choose and trust Cheapflights to book the best flight deals from Belfast to Washington for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Belfast to Washington with no change fees?

Yes, we can. To see specific flights from Belfast to Washington with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Belfast to Washington become cheaper?

Yes! Start tracking prices for Belfast to Washington flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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