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$398+ 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
may. 5 — may. 121
lun. 5/5
lun. 5/12
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 abril 30, 2025.

Round-trip from

$732
(oojo)

One-way from

$398
(American Airlines)

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 abril 30, 2025.

This oojo deal was found by Cheapflights users on 4/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/2311:59 pmPDX - BHD
2 stops27h 31mBritish Airways
dom. 8/316:50 amBHD - PDX
2 stops23h 14mBritish Airways
Deal found 4/29$732
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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.
mar. 10/287:50 pmSEA - BHD
1 stop15h 50mBritish Airways
mar. 11/46:35 amBHD - SEA
1 stop12h 45mBritish Airways
Deal found 4/29$763
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/2810:46 amSEA - BHD
2 stops16h 44mAmerican Airlines
mar. 11/46:35 amBHD - SEA
1 stop12h 45mAmerican Airlines
Deal found 4/29$770
This Mytrip deal was found by Cheapflights users on 4/28. 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. 6/1110:00 amSEA - BFS
3 stops24h 35mMultiple Airlines
mié. 6/183:05 pmBFS - SEA
3 stops39h 11mMultiple Airlines
Deal found 4/28$832
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 5/46:07 pmSEA - BHD
1 stop19h 08mDelta
lun. 5/125:25 pmBHD - SEA
1 stop26h 15mDelta
Deal found 4/28$887
This Trip.com deal was found by Cheapflights users on 4/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/27:00 pmSEA - BHD
2 stops17h 25mMultiple Airlines
dom. 5/117:05 amBHD - SEA
2 stops21h 35mMultiple Airlines
Deal found 4/29$938
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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.
mar. 6/37:35 pmSEA - BHD
2 stops15h 50mAer Lingus
mar. 6/107:00 amBHD - SEA
2 stops18h 50mAer Lingus
Deal found 4/28$1,010
This KLM deal was found by Cheapflights users on 4/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/25:12 pmSEA - BHD
2 stops15h 43mKLM
sáb. 5/105:25 pmBHD - SEA
1 stop30h 32mKLM
Deal found 4/29$1,036
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/133:25 pmPDX - BFS
3 stops20h 40mMultiple Airlines
vie. 6/204:40 pmBFS - PDX
3 stops38h 16mMultiple Airlines
Deal found 4/29$1,326
This KLM deal was found by Cheapflights users on 4/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/241:45 pmPDX - BHD
2 stops20h 50mKLM
lun. 7/76:30 amBHD - PDX
1 stop12h 50mKLM
Deal found 4/29$1,466
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 6/247:25 pmPDX - BHD
1 stop14h 05mAmerican Airlines
lun. 7/79:50 amBHD - PDX
1 stop15h 45mAmerican Airlines
Deal found 4/29$2,085

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 abril 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

sáb. 8/23

11:59 pm-11:30 am

2 stops27h 31m

Belfast City

dom. 8/31

6:50 am-10:04 pm

2 stops23h 14m

$732

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

mié. 6/11

10:00 am-6:35 pm

3 stops24h 35m

Belfast Intl

mié. 6/18

3:05 pm-10:16 pm

3 stops39h 11m

$832

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

mar. 6/3

7:35 pm-7:25 pm

2 stops15h 50m

Belfast City

mar. 6/10

7:00 am-5:50 pm

2 stops18h 50m

$1,010

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

jue. 6/12

7:05 am-8:55 pm

3 stops29h 50m

Belfast City

jue. 6/19

7:05 am-3:03 pm

3 stops39h 58m

$1,053

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

mar. 6/3

8:20 pm-7:25 pm

1 stop15h 05m

Belfast City

mar. 6/10

6:35 am-11:10 am

1 stop12h 35m

$1,116

PortlandBelfast

PDX - BFS

PDXBFS

Portland

vie. 6/13

3:25 pm-8:05 pm

3 stops20h 40m

Belfast Intl

vie. 6/20

4:40 pm-10:56 pm

3 stops38h 16m

$1,326

PortlandBelfast

PDX - BHD

PDXBHD

Portland

mar. 6/24

1:45 pm-6:35 pm

2 stops20h 50m

Belfast City

lun. 7/7

6:30 am-11:20 am

1 stop12h 50m

$1,466

PortlandBelfast

PDX - BHD

PDXBHD

Portland

mar. 6/24

7:25 pm-5:30 pm

1 stop14h 05m

Belfast City

lun. 7/7

9:50 am-5:35 pm

1 stop15h 45m

$2,085

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

dom. 6/29

1:55 pm-4:55 pm

1 stop19h 00m

Belfast City

jue. 7/10

5:25 pm-11:35 am

1 stop26h 10m

$3,754

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

mié. 6/25

9:50 am-4:55 pm

2 stops23h 05m

Belfast City

dom. 7/6

6:30 am-3:50 pm

1 stop17h 20m

$4,478

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 abril 30, 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 abril 30, 2025.
To help decide which airline to fly from Washington to Belfast, see what other customers have to say about Delta, KLM 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
7,929 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

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
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

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.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

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
7,929 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

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
1,076 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

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
6,835 reviews
Delta
8.0
Very good
7,929 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Overall

8.0

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 cheapest airlines to fly from State of Washington to Belfast one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $398. However, be on the lookout for offers from British Airways and Delta, as they are both options that can get you from State of Washington to Belfast for a low price.

  • 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 abril 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$544Average$891FlexibilityNo cancel feeOn-time70%

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