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Cheap flights from Belfast to Washington from £579

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
3 Sep — 10 Sep1
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 4 August 2026.

Wed 2/906:10 -
2 stops22h 30m
Tue 8/915:40 -
2 stops21h 25m
Deal found 2/8£579
Thu 3/909:00 -
2 stops19h 40m
Mon 7/915:40 -
2 stops23h 30m
Deal found 2/8£592
Thu 3/907:00 -
2 stops18h 55m
Mon 7/915:40 -
2 stops20h 50m
Deal found 2/8£624
Mon 5/1010:35 -
1 stop17h 39m
Fri 9/1007:15 -
2 stops22h 35m
Deal found 31/7£669
Mon 5/1008:45 -
1 stop19h 29m
Fri 9/1007:15 -
2 stops29h 15m
Deal found 31/7£680
Thu 3/909:50 -
1 stop14h 45m
Mon 7/917:45 -
1 stop15h 10m
Deal found 3/8£702
Thu 3/909:50 -
1 stop14h 45m
Mon 7/906:05 -
2 stops19h 15m
Deal found 3/8£703
Wed 25/1109:15 -
1 stop15h 35m
Sun 29/1118:45 -
1 stop14h 05m
Deal found 30/7£721
Wed 7/1011:35 -
1 stop32h 00m
Sun 11/1020:20 -
1 stop16h 15m
Deal found 3/8£723

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 4 August 2026.

Round-trip from

£579
2/9-8/9
  • 2/9-8/9
  • 4 total stops
  • 43h 55m 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 4 August 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

Wed 2/9

06:10-20:40

2 stops22h 30m

Seattle/Tacoma Intl

Tue 8/9

15:40-21:05

2 stops21h 25m

£579

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 3/9

09:00-20:40

2 stops19h 40m

Seattle/Tacoma Intl

Mon 7/9

15:40-23:10

2 stops23h 30m

£592

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 5/10

10:35-20:14

1 stop17h 39m

Seattle/Tacoma Intl

Fri 9/10

07:15-13:50

2 stops22h 35m

£669

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 5/10

08:45-20:14

1 stop19h 29m

Seattle/Tacoma Intl

Fri 9/10

07:15-20:30

2 stops29h 15m

£680
Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 25/11

09:15-16:50

1 stop15h 35m

Seattle/Tacoma Intl

Sun 29/11

18:45-16:50

1 stop14h 05m

£721

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 7/10

10:05-18:25

1 stop16h 20m

Seattle/Tacoma Intl

Sun 11/10

06:12-14:35

2 stops24h 23m

£723

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 14/10

19:40-11:35

1 stop23h 55m

Seattle/Tacoma Intl

Sun 18/10

10:31-18:45

2 stops24h 14m

£723

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 3/9

21:05-21:07

3 stops32h 02m

Seattle/Tacoma Intl

Fri 11/9

15:40-23:20

3 stops23h 40m

£815
Cheapest one-way
Fastest single journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 3/1

09:10-16:50

1 stop15h 40m

£699

Flights are sorted by cheapest return flights first.

Deals found on 3/8

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.

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 15h 35m. 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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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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