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Cheap flights from Washington to Belfast City Airport from £313

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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
23 Nov — 30 Nov1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Washington to Belfast City

Enter your travel dates to find the best prices.

Cheapest flights from Washington to Belfast City
Explore the most affordable flight options available from Washington to Belfast City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 October 2025.

Wed 3/1218:50SEA - BHD
1 stop28h 40mBritish Airways
Sun 7/1220:25BHD - SEA
1 stop28h 30mBritish Airways
Deal found 23/10£505
Wed 3/1215:05SEA - BHD
1 stop21h 55mDelta
Sun 7/1206:30BHD - SEA
1 stop13h 20mDelta
Deal found 22/10£514
Thu 25/1209:19PDX - BHD
2 stops23h 31mKLM
Thu 8/117:20BHD - PDX
1 stop26h 05mKLM
Deal found 22/10£658
Thu 25/1212:29PDX - BHD
2 stops20h 21mVirgin Atlantic
Thu 8/117:20BHD - PDX
2 stops36h 15mVirgin Atlantic
Deal found 22/10£666
Wed 24/1217:15PDX - BHD
2 stops39h 35mKLM
Fri 9/117:20BHD - PDX
2 stops36h 15mKLM
Deal found 22/10£670
Wed 29/1019:50SEA - BHD
1 stop28h 40mBritish Airways
Wed 5/1119:25BHD - SEA
1 stop29h 30mBritish Airways
Deal found 23/10£767
Wed 24/1217:45PDX - BHD
1 stop29h 45mBritish Airways
Fri 9/106:45BHD - PDX
1 stop17h 10mBritish Airways
Deal found 22/10£842
Wed 24/1217:45PDX - BHD
1 stop29h 45mMultiple Airlines
Fri 9/119:35BHD - PDX
2 stops26h 25mMultiple Airlines
Deal found 22/10£847

Cheap flight deals from Washington to Belfast City

Keep the following information in mind while searching for Washington to Belfast City flight deals. Data was last updated 24 October 2025.

Round-trip from

£505

One-way from

£313

Popular in

December

Cheapest in

March

Average price

£582
British Airways
  • British Airways
  • 3/12-7/12
  • 2 total stops
  • 57h 10m total
  • Washington to Belfast
Search Deals
Delta
  • Delta
  • 7/12
  • 1 total stop
  • 23h 35m total
  • Washington to Belfast
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£53 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Washington to Belfast City 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 24 October 2025.
Use the filters below to find and compare flights from Washington to Belfast City Airport that are best for you.

Fly from

Washington

Fly to

Belfast City

Route

Depart

Return

Price

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 3/12

18:50-07:30

1 stop28h 40m

Belfast City

Sun 7/12

20:25-16:55

1 stop28h 30m

£505

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 3/12

15:05-21:00

1 stop21h 55m

Belfast City

Sun 7/12

06:30-11:50

1 stop13h 20m

£514

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Thu 26/3

08:01-14:00

2 stops22h 59m

Belfast City

Thu 16/4

06:35-17:40

1 stop19h 05m

£539

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 3/4

19:30-18:15

1 stop14h 45m

Belfast City

Tue 7/4

09:35-17:40

1 stop16h 05m

£558

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 7/4

11:51-13:00

2 stops17h 09m

Belfast City

Thu 16/4

06:35-11:35

1 stop13h 00m

£559

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 7/4

14:05-16:55

1 stop18h 50m

Belfast City

Thu 16/4

06:30-11:35

1 stop13h 05m

£571

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

13:35-14:15

1 stop16h 40m

Belfast City

Wed 18/3

09:15-17:55

1 stop15h 40m

£571

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

18:50-16:45

1 stop13h 55m

Belfast City

Tue 17/3

08:45-17:55

1 stop16h 10m

£572

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 1/3

17:45-16:50

1 stop15h 05m

Belfast City

Thu 5/3

15:05-15:55

1 stop32h 50m

£588

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 1/3

11:10-16:50

2 stops21h 40m

Belfast City

Thu 5/3

17:20-11:25

1 stop26h 05m

£607

Flights are sorted by cheapest return flights first.

Deals found on 23/10

Showing 1-10 of 12 results
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Best time to book a flight from Washington to Belfast City

Have a flexible travel schedule? Discover the best time to fly to Belfast City from Washington 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 Washington to Belfast City Airport
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 Washington to Belfast City. 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 State of Washington to Belfast City Airport?

    British Airways and Delta can get you from State of Washington to Belfast City Airport in just under 21h 55m. Your travel time can differ by up to 6h 45m. The distance from State of Washington to Belfast City Airport is about 4472 mi. Both multi-stop and direct flights can be found to your destination and back.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington to Belfast City 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

Travelling to a place near Belfast City Airport?

Book flights to Belfast City Airport if you plan to visit one of these locations
Bangor
Newcastle
Carrickfergus

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Fly with Cheapflights

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

Cheapflights helps you search for flights from Washington to Belfast City via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Washington to Belfast City for you. Better yet — we are completely free to use.

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

Certainly. Search results for flights to Belfast City from Washington shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on Washington to Belfast City 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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