HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Belfast

$426+ 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 3/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Belfast with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Washington to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Washington (USWA) to Belfast (BF1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 30, 2025.

Round-trip from

$645
(Mytrip)

One-way from

$426
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$951
From Washington to Belfast
Search Deals
One-way flight from Washington to Belfast
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($177 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2025
Search Deals

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 January 30, 2025.

This Mytrip deal was found by Cheapflights users on 1/30. 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.
Wed 3/193:35 pmSEA - BFS
2 stops21h 35mMultiple Airlines
Wed 3/267:55 amBFS - SEA
2 stops17h 05mMultiple Airlines
Deal found 1/30$645
This oojo deal was found by Cheapflights users on 1/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/57:35 amPDX - BHD
2 stops18h 30mBritish Airways
Wed 2/129:10 amBHD - PDX
1 stop15h 25mBritish Airways
Deal found 1/28$651
This British Airways deal was found by Cheapflights users on 1/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/301:30 pmSEA - BHD
1 stop14h 25mBritish Airways
Mon 5/123:25 pmBHD - SEA
1 stop27h 45mBritish Airways
Deal found 1/30$803
This Finnair deal was found by Cheapflights users on 1/30. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/206:50 pmSEA - BHD
1 stop16h 00mFinnair
Thu 2/276:35 amBHD - SEA
1 stop18h 20mFinnair
Deal found 1/30$874
This American Airlines deal was found by Cheapflights users on 1/29. 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.
Fri 5/211:20 amSEA - BHD
2 stops17h 25mAmerican Airlines
Sun 5/116:50 amBHD - SEA
1 stop12h 40mAmerican Airlines
Deal found 1/29$878
This American Airlines deal was found by Cheapflights users on 1/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/22:55 pmSEA - BHD
2 stops16h 35mMultiple Airlines
Sun 5/116:05 pmBHD - SEA
1 stop25h 30mMultiple Airlines
Deal found 1/30$879
This Gotogate deal was found by Cheapflights users on 1/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/169:00 pmSEA - BHD
2 stops27h 40mAer Lingus
Sun 3/236:30 amBHD - SEA
2 stops19h 45mAer Lingus
Deal found 1/30$890
This Mytrip deal was found by Cheapflights users on 1/30. 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.
Sun 3/1610:10 amPDX - BFS
3 stops28h 30mMultiple Airlines
Sun 3/236:35 amBFS - PDX
2 stops23h 03mMultiple Airlines
Deal found 1/30$1,703
This business-class.com deal was found by Cheapflights users on 1/29. 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 business-class.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/711:59 pmPDX - BHD
2 stops29h 01mMultiple Airlines
Mon 4/147:30 pmBHD - PDX
2 stops35h 26mMultiple Airlines
Deal found 1/29$3,294
This KLM deal was found by Cheapflights users on 1/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/305:10 pmSEA - BHD
2 stops15h 45mKLM
Thu 4/106:30 amBHD - SEA
1 stop13h 15mKLM
Deal found 1/30$4,276

Find flights from Washington to Belfast within your budget

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 January 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 3/19

3:35 pm-8:10 pm

2 stops21h 35m

Belfast Intl

Wed 3/26

7:55 am-6:00 pm

2 stops17h 05m

$645

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 4/30

1:30 pm-11:55 am

1 stop14h 25m

Belfast City

Mon 5/12

3:25 pm-11:10 am

1 stop27h 45m

$803

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 2/20

6:50 pm-6:50 pm

1 stop16h 00m

Belfast City

Thu 2/27

6:35 am-4:55 pm

1 stop18h 20m

$874

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 5/2

11:20 am-12:45 pm

2 stops17h 25m

Belfast City

Sun 5/11

6:50 am-11:30 am

1 stop12h 40m

$878

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 5/2

2:55 pm-3:30 pm

2 stops16h 35m

Belfast City

Sun 5/11

6:05 pm-11:35 am

1 stop25h 30m

$879

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 3/16

9:00 pm-7:40 am

2 stops27h 40m

Belfast City

Sun 3/23

6:30 am-7:15 pm

2 stops19h 45m

$890

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 4/7

5:20 pm-7:35 pm

2 stops18h 15m

Belfast City

Mon 4/14

7:30 pm-5:35 pm

1 stop30h 05m

$1,672

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Sun 3/16

10:10 am-9:40 pm

3 stops28h 30m

Belfast Intl

Sun 3/23

6:35 am-10:38 pm

2 stops23h 03m

$1,703

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 4/7

11:59 pm-1:00 pm

2 stops29h 01m

Belfast City

Mon 4/14

7:30 pm-10:56 pm

2 stops35h 26m

$3,294

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 3/30

5:10 pm-4:55 pm

2 stops15h 45m

Belfast City

Thu 4/10

6:30 am-11:45 am

1 stop13h 15m

$4,276

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

Showing 1-10 of 11 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.

Travel insights for flights from Washington to Belfast

Get recent, data-driven insights about flights from Washington to Belfast including ideal travel times, pricing trends, and more.

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.

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 January 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 January 30, 2025.
KLM
7.8
Good
1,335 reviews

Crew

8.4

Food

7.3

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

KLM
7.8
Good
1,335 reviews
KLM
7.8
Good
1,335 reviews

Crew

8.4

Food

7.3

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Finnair
7.6
Good
1,285 reviews
KLM
7.8
Good
1,335 reviews

Crew

8.4

Food

7.3

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,335 reviews

Crew

8.4

Food

7.3

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Aer Lingus
7.1
Good
1,077 reviews
KLM
7.8
Good
1,335 reviews

Crew

8.4

Food

7.3

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

British Airways
6.6
Okay
6,795 reviews
KLM
7.8
Good
1,335 reviews

Crew

8.4

Food

7.3

Entertainment

7.2

Boarding

7.8

Comfort

7.7

Overall

7.8

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to Belfast

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Belfast Intl flights
John F Kennedy Intl to Belfast Intl flights
Seattle to Belfast Intl flights
Boston to Belfast Intl flights
Dulles Intl to Belfast Intl flights
John F Kennedy Intl to Belfast City flights
Newark to Belfast City flights
Boston to Belfast City flights
LaGuardia to Belfast Intl flights
Hobby to Belfast City flights
Hobby to Belfast Intl flights
Dulles Intl to Belfast City flights
LaGuardia to Belfast City flights
Dallas/Fort Worth to Belfast Intl flights
Dallas/Fort Worth to Belfast City flights
Atlanta to Belfast Intl flights
Austin to Belfast City flights
Baltimore to Belfast Intl flights
George Bush Intcntl to Belfast Intl flights
Baltimore to Belfast City flights
George Bush Intcntl to Belfast City flights
Reagan-National to Belfast Intl flights
St. Louis to Belfast Intl flights
St. Louis to Belfast City flights
Philadelphia to Belfast Intl flights
Los Angeles to Belfast Intl flights
Stewart to Belfast Intl flights
Seattle to Belfast City flights
Reagan-National to Belfast City flights
O'Hare Intl to Belfast Intl flights
Raleigh to Belfast Intl flights
Los Angeles to Belfast City flights
Philadelphia to Belfast City flights
Charlotte to Belfast Intl flights
Love Field to Belfast City flights
San Francisco to Belfast Intl flights
Atlanta to Belfast City flights
Charlotte to Belfast City flights
San Francisco to Belfast City flights
Orlando to Belfast Intl flights
Minneapolis to Belfast Intl flights
O'Hare Intl to Belfast City flights
Raleigh to Belfast City flights
Detroit to Belfast Intl flights
New Orleans to Belfast City flights
Greensboro to Belfast City flights
Minneapolis to Belfast City flights
Denver to Belfast Intl flights
Fort Lauderdale to Belfast Intl flights
Miami to Belfast Intl flights

Top 2 airlines flying from Washington to Belfast

Discover the top 2 airlines 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 January 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$544Average$872FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$573Average$791FlexibilityNo cancel feeOn-time71%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.