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$635+ Cheap flights from Washington to Belfast

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
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Cheap flight deals from Washington to Belfast

Keep the following information in mind while searching for Washington to Belfast flight deals. Data was last updated octubre 30, 2025.

Round-trip from

$635
(Delta)

Popular in

December

Cheapest in

March

Average price

$776
From Washington to Belfast
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($95 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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Find flight deals from Washington to Belfast

Cheapest flights from Washington to Belfast
Explore the most affordable flight options available from Washington to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 30, 2025.

This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/31:25 pmPDX - BHD
1 stop19h 25mDelta
mié. 12/106:30 amBHD - PDX
1 stop12h 55mDelta
Deal found 10/30$635
This Virgin Atlantic deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/37:20 amSEA - BHD
2 stops29h 40mVirgin Atlantic
dom. 12/76:30 amBHD - SEA
2 stops17h 05mVirgin Atlantic
Deal found 10/29$650
This British Airways deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/35:45 pmPDX - BHD
1 stop12h 30mBritish Airways
mié. 12/1011:25 amBHD - PDX
2 stops19h 58mBritish Airways
Deal found 10/28$677
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/33:05 pmSEA - BHD
1 stop17h 45mDelta
dom. 12/75:20 pmBHD - SEA
1 stop26h 30mDelta
Deal found 10/29$755
This KAYAK deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/297:50 pmSEA - BHD
1 stop28h 40mBritish Airways
mié. 11/56:35 amBHD - SEA
1 stop18h 20mBritish Airways
Deal found 10/28$918
This Mytrip deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/135:50 amSEA - BFS
3 stops22h 55mMultiple Airlines
sáb. 12/2010:25 pmBFS - SEA
2 stops27h 55mMultiple Airlines
Deal found 10/30$1,508
This Mytrip deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/1910:30 amPDX - BFS
3 stops23h 25mMultiple Airlines
mar. 12/28:35 amBFS - PDX
3 stops32h 40mMultiple Airlines
Deal found 10/28$1,746
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/295:30 amPDX - BHD
2 stops27h 20mDelta
sáb. 1/35:20 pmBHD - PDX
1 stop26h 05mDelta
Deal found 10/30$1,796
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/285:25 pmPDX - BHD
2 stops39h 25mDelta
sáb. 1/35:20 pmBHD - PDX
1 stop26h 05mDelta
Deal found 10/30$1,807
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/255:30 amPDX - BHD
2 stops27h 20mDelta
sáb. 1/35:20 pmBHD - PDX
1 stop26h 05mDelta
Deal found 10/30$1,827
This Cheapflightsfares deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/283:29 pmSEA - BHD
2 stops17h 21mBritish Airways
jue. 1/88:00 pmBHD - SEA
1 stop23h 30mBritish Airways
Deal found 10/28$3,153
This Cheapflightsfares deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/296:50 pmSEA - BHD
1 stop15h 45mBritish Airways
vie. 1/96:45 amBHD - SEA
2 stops23h 22mBritish Airways
Deal found 10/29$3,178

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Belfast 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 2,558,603 searches. Data last updated octubre 30, 2025.
Use the filters below to find and compare flights from Washington to Belfast that are best for you.

Fly from

Washington

Fly to

Belfast

Route

Depart

Return

Price

PortlandBelfast

PDX - BHD

PDXBHD

Portland

mié. 12/3

1:25 pm-4:50 pm

1 stop19h 25m

Belfast City

mié. 12/10

6:30 am-11:25 am

1 stop12h 55m

$635

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

mar. 2/24

2:35 pm-5:55 pm

2 stops19h 20m

Belfast Intl

mar. 3/3

6:30 am-5:00 pm

2 stops18h 30m

$649

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

mié. 12/3

7:20 am-9:00 pm

2 stops29h 40m

Belfast City

dom. 12/7

6:30 am-3:35 pm

2 stops17h 05m

$650

PortlandBelfast

PDX - BHD

PDXBHD

Portland

lun. 1/5

5:45 pm-4:05 pm

1 stop14h 20m

Belfast City

lun. 1/12

6:35 am-3:55 pm

1 stop17h 20m

$674

PortlandBelfast

PDX - BHD

PDXBHD

Portland

mié. 12/3

5:45 pm-2:15 pm

1 stop12h 30m

Belfast City

mié. 12/10

11:25 am-11:23 pm

2 stops19h 58m

$677

PortlandBelfast

PDX - BHD

PDXBHD

Portland

dom. 4/19

7:30 pm-6:45 pm

1 stop15h 15m

Belfast City

sáb. 5/2

7:05 am-5:40 pm

1 stop18h 35m

$701

PortlandBelfast

PDX - BHD

PDXBHD

Portland

dom. 4/19

3:18 pm-6:45 pm

2 stops19h 27m

Belfast City

sáb. 5/2

7:05 am-7:21 pm

2 stops20h 16m

$724

PortlandBelfast

PDX - BHD

PDXBHD

Portland

vie. 4/3

7:30 pm-6:15 pm

1 stop14h 45m

Belfast City

mar. 4/7

9:35 am-5:40 pm

1 stop16h 05m

$743

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

mié. 12/3

3:05 pm-4:50 pm

1 stop17h 45m

Belfast City

dom. 12/7

5:20 pm-11:50 am

1 stop26h 30m

$755

PortlandBelfast

PDX - BHD

PDXBHD

Portland

dom. 3/1

5:45 pm-6:40 pm

1 stop16h 55m

Belfast City

jue. 3/5

5:45 pm-3:55 pm

1 stop30h 10m

$783

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 16 results
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Best time to book a flight from Washington to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Washington with our price prediction graph.
Estimated round-trip 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

What is the cheapest time of day to fly from WA to BFS?

Find hourly flight availability from Washington to Belfast. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octubre 30, 2025.

When flying from State of Washington to Belfast, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 34% versus a flight in the morning.

Related info for your journey

Find useful and relevant information for your journey from Washington to Belfast. 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?

    For as low as $674, Delta can have you in Belfast from State of Washington in 14h 20m. There are 4585 mi between State of Washington and Belfast. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from State of Washington to Belfast?

    While some choose either Seattle/Tacoma Intl - Belfast City or Portland - Belfast Intl, Seattle/Tacoma Intl - Belfast Intl is the most popular route from State of Washington to Belfast.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington to Belfast 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 Washington to Belfast

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Washington to Belfast

Discover the top airline that operate flights from Washington to Belfast. 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 2,558,603 searches. Data last updated octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$737Average$951FlexibilityNo cancel feeOn-time70%

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