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$435+ Cheap flights from Washington to Belfast

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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
Apr 29 — May 61
Tue 4/29
Tue 5/6
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 April 24, 2025.

Round-trip from

$809
(Mytrip)

One-way from

$745
(EaseMyTrip)

Popular in

June

Cheapest in

October

Average price

$785
From Washington to Belfast
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One-way flight from Washington to Belfast
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Highest demand for flights based on searches. 18% potential increase in price ($209 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($51 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 24, 2025.

This Travelocity deal was found by Cheapflights users on 4/23. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2311:59 pmPDX - BHD
2 stops27h 31mBritish Airways
Sun 8/316:50 amBHD - PDX
1 stop18h 45mBritish Airways
Deal found 4/23$725
This Cheapflightsfares deal was found by Cheapflights users on 4/24. 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.
Tue 10/282:35 pmSEA - BHD
1 stop16h 00mBritish Airways
Tue 11/48:40 amBHD - SEA
1 stop16h 15mBritish Airways
Deal found 4/24$764
This American Airlines deal was found by Cheapflights users on 4/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/281:29 pmSEA - BHD
2 stops17h 06mAmerican Airlines
Tue 11/46:35 amBHD - SEA
1 stop12h 45mAmerican Airlines
Deal found 4/23$770
This Mytrip deal was found by Cheapflights users on 4/22. 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.
Wed 6/45:35 amSEA - BFS
3 stops29h 00mMultiple Airlines
Wed 6/116:10 amBFS - SEA
3 stops40h 53mMultiple Airlines
Deal found 4/22$809
This Mytrip deal was found by Cheapflights users on 4/23. 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.
Sat 8/233:20 pmPDX - BFS
2 stops24h 10mMultiple Airlines
Sun 8/3110:55 pmBFS - PDX
3 stops45h 53mMultiple Airlines
Deal found 4/23$873
This Delta deal was found by Cheapflights users on 4/23. 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.
Sat 5/35:30 amSEA - BHD
2 stops27h 25mDelta
Mon 5/125:25 pmBHD - SEA
1 stop30h 32mDelta
Deal found 4/23$943
This KLM deal was found by Cheapflights users on 4/23. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/25:12 pmSEA - BHD
2 stops15h 43mKLM
Mon 5/125:25 pmBHD - SEA
1 stop26h 15mKLM
Deal found 4/23$988
This Mytrip deal was found by Cheapflights users on 4/23. 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.
Sat 6/75:35 amSEA - BHD
3 stops31h 35mMultiple Airlines
Sat 6/147:00 amBHD - SEA
3 stops40h 03mMultiple Airlines
Deal found 4/23$1,015
This Iberia deal was found by Cheapflights users on 4/23. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/301:30 pmSEA - BHD
1 stop14h 25mIberia
Sat 5/107:05 amBHD - SEA
2 stops24h 04mIberia
Deal found 4/23$1,140
This KLM deal was found by Cheapflights users on 4/23. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/181:05 pmPDX - BHD
1 stop24h 10mKLM
Fri 7/256:30 amBHD - PDX
2 stops18h 37mKLM
Deal found 4/23$1,140
This Delta deal was found by Cheapflights users on 4/23. 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.
Fri 7/183:15 pmPDX - BHD
2 stops22h 00mDelta
Fri 7/256:30 amBHD - PDX
2 stops20h 13mDelta
Deal found 4/23$1,144
This Gurufare deal was found by Cheapflights users on 4/23. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/77:35 pmSEA - BHD
2 stops29h 40mAer Lingus
Sat 6/147:00 pmBHD - SEA
2 stops30h 50mAer Lingus
Deal found 4/23$1,172

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 April 24, 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

Sat 8/23

11:59 pm-11:30 am

2 stops27h 31m

Belfast City

Sun 8/31

6:50 am-5:35 pm

1 stop18h 45m

$725

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 6/4

5:35 am-6:35 pm

3 stops29h 00m

Belfast Intl

Wed 6/11

6:10 am-3:03 pm

3 stops40h 53m

$809

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Sat 8/23

3:20 pm-11:30 pm

2 stops24h 10m

Belfast Intl

Sun 8/31

10:55 pm-12:48 pm

3 stops45h 53m

$873

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 5/4

1:30 pm-11:30 am

1 stop14h 00m

Belfast City

Mon 5/12

7:30 pm-11:10 am

1 stop23h 40m

$881

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 5/4

1:55 pm-9:15 pm

1 stop23h 20m

Belfast City

Mon 5/12

5:25 pm-8:49 pm

2 stops35h 24m

$944

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 6/7

5:35 am-9:10 pm

3 stops31h 35m

Belfast City

Sat 6/14

7:00 am-3:03 pm

3 stops40h 03m

$1,015

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 7/18

1:05 pm-9:15 pm

1 stop24h 10m

Belfast City

Fri 7/25

6:30 am-5:07 pm

2 stops18h 37m

$1,140

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 7/18

3:15 pm-9:15 pm

2 stops22h 00m

Belfast City

Fri 7/25

6:30 am-6:43 pm

2 stops20h 13m

$1,144

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 6/7

7:35 pm-9:15 am

2 stops29h 40m

Belfast City

Sat 6/14

7:00 pm-5:50 pm

2 stops30h 50m

$1,172

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 6/8

1:30 pm-1:05 pm

1 stop15h 35m

Belfast City

Sun 6/15

6:50 am-11:30 am

1 stop12h 40m

$1,184

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 16 results
1
2

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 April 24, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from State of Washington to Belfast as you normally would.

Rainfall in Belfast by month

Plan your trip to Belfast by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Belfast ranges from 2.0 - 3.5 inches per month. October is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Belfast when rainfall is around 2.0 in.

Temperature in Belfast by month

Plan your trip to Belfast by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Belfast, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Belfast

Get insights into the airlines that provide service to Belfast. 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 Belfast. Reviews last updated April 24, 2025.
To help decide which airline to fly from Washington to Belfast, see what other customers have to say about Delta, Virgin Atlantic and American Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,920 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
642 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,068 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
6,799 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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.

  • What is the cheapest month to book a flight from State of Washington to Belfast?

    Currently, February is the cheapest month in which you can book a flight from State of Washington to Belfast (average of $657). Flying from State of Washington to Belfast in June is currently the most expensive (average of $1,189). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Washington to Belfast

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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 April 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$544Average$928FlexibilityNo cancel feeOn-time70%

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