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Cheap flights from Belfast Intl Airport to Washington from £362

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 15/7. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
30 May — 6 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast Intl to Washington

Enter your travel dates to find the best prices.

Cheapest flights from Belfast Intl to Washington
Explore the most affordable flight options available from Belfast Intl to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2026.

Thu 11/621:35
BFS
-
SEA
3 stops29h 10m
Multiple Airlines
Thu 18/607:00
SEA
-
BFS
3 stops27h 55m
Multiple Airlines
Deal found 27/4£815
Thu 14/506:35
BFS
-
SEA
2 stops20h 10m
Multiple Airlines
Tue 19/521:45
SEA
-
BFS
1 stop17h 35m
Multiple Airlines
Deal found 26/4£970

Find flight deals from Belfast Intl to Washington

Keep the following information in mind while searching for Belfast Intl to Washington flight deals. Data was last updated 30 April 2026.

Round-trip from

£815

One-way from

£362
11/6-18/6
  • 11/6-18/6
  • 6 total stops
  • 57h 05m total
  • Belfast to Washington
Search Deals
15/7
  • 15/7
  • 3 total stops
  • 59h 05m total
  • Belfast to Washington
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast Intl 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 30 April 2026.
Use the filters below to find and compare flights from Belfast Intl Airport to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 11/6

21:35-18:45

3 stops29h 10m

Seattle/Tacoma Intl

Thu 18/6

07:00-18:55

3 stops27h 55m

£815
Fastest return journey

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 14/5

06:35-18:45

2 stops20h 10m

Seattle/Tacoma Intl

Tue 19/5

21:45-23:20

1 stop17h 35m

£970
Cheapest one-way

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 15/7

15:40-18:45

3 stops59h 05m

£362

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 16/7

06:40-21:00

3 stops22h 20m

£473

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Fri 17/7

19:20-18:45

2 stops31h 25m

£562
Fastest single journey

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 18/7

06:55-21:00

2 stops22h 05m

£566

Flights are sorted by cheapest return flights first.

Deals found on 25/4

Sorted by cheapest first

Best time to book a flight from Belfast Intl to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Belfast Intl 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 Intl Airport 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 30 April 2026.
Read reviews from past customers who have flown with American Airlines from Belfast Intl Airport to Washington. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,681 reviews
Check prices

Overall

7.1

Boarding

7.5

Food

6.4

Crew

7.9

Comfort

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!
American Airlines
7.1
Good
11,681 reviews
American Airlines
7.1
Good
11,681 reviews
Check prices

Overall

7.1

Boarding

7.5

Food

6.4

Crew

7.9

Comfort

7.2

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!

Related info for your journey

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast Intl 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.

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Belfast Intl to Washington

Discover the top airline that operate flights from Belfast Intl 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 30 April 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£556Average£556FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

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

Need flexible booking options for your flight to Washington from Belfast Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Yes, Cheapflights offers price alerts on Belfast Intl to Washington flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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