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

Currently, January is the cheapest month in which you can book a flight from State of Washington to Belfast (average of £67). Flying from State of Washington to Belfast in July is currently the most expensive (average of £90). 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 are the most popular routes from State of Washington to Belfast?

When deciding which route to take from State of Washington to Belfast consider Seattle/Tacoma Intl - Belfast Intl, Seattle/Tacoma Intl - Belfast City or Portland - Belfast Intl as they are the most popular.

What is the cheapest month to fly from State of Washington to Belfast?

Flights from State of Washington to Belfast lean towards being more expensive in June. Prices are generally better when you fly from State of Washington to Belfast in October, with the cheapest ticket starting at £411.

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

When flying from State of Washington to Belfast, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 holiday 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.

£327+ Flights from Washington to Belfast

Cheap flight deals from Washington to Belfast

Round-trip from	£545
One-way from	£327
Popular in	June
Cheapest in	October
Average price	£591

British Airways
23/8-31/8
3 total stops
46h 16m total
Washington to Belfast

Search Deals

British Airways
23/8
2 total stops
27h 31m total
Washington to Belfast

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£118 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£29 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 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 24 April 2025.

Sat 23/823:59PDX - BHD

2 stops27h 31mBritish Airways

Sun 31/806:50BHD - PDX

1 stop18h 45mBritish Airways

Deal found 23/4£545

Tue 28/1014:35SEA - BHD

1 stop16h 00mBritish Airways

Tue 4/1108:40BHD - SEA

1 stop16h 15mBritish Airways

Deal found 24/4£575

Tue 28/1013:29SEA - BHD

2 stops17h 06mAmerican Airlines

Tue 4/1106:35BHD - SEA

1 stop12h 45mAmerican Airlines

Deal found 23/4£579

Wed 4/605:35SEA - BFS

3 stops29h 00mMultiple Airlines

Wed 11/606:10BFS - SEA

3 stops40h 53mMultiple Airlines

Deal found 22/4£609

Sat 23/815:20PDX - BFS

2 stops24h 10mMultiple Airlines

Sun 31/822:55BFS - PDX

3 stops45h 53mMultiple Airlines

Deal found 23/4£657

Sat 3/505:30SEA - BHD

2 stops27h 25mDelta

Mon 12/517:25BHD - SEA

1 stop30h 32mDelta

Deal found 23/4£710

Fri 2/517:12SEA - BHD

2 stops15h 43mKLM

Mon 12/517:25BHD - SEA

1 stop26h 15mKLM

Deal found 23/4£743

Sat 7/605:35SEA - BHD

3 stops31h 35mMultiple Airlines

Sat 14/607:00BHD - SEA

3 stops40h 03mMultiple Airlines

Deal found 23/4£764

Wed 30/413:30SEA - BHD

1 stop14h 25mIberia

Sat 10/507:05BHD - SEA

2 stops24h 04mIberia

Deal found 23/4£858

Fri 18/713:05PDX - BHD

1 stop24h 10mKLM

Fri 25/706:30BHD - PDX

2 stops18h 37mKLM

Deal found 23/4£858

Fri 18/715:15PDX - BHD

2 stops22h 00mDelta

Fri 25/706:30BHD - PDX

2 stops20h 13mDelta

Deal found 23/4£861

Sat 7/619:35SEA - BHD

2 stops29h 40mAer Lingus

Sat 14/619:00BHD - SEA

2 stops30h 50mAer Lingus

Deal found 23/4£882

Best flights from Washington to Belfast
Discover carefully curated flight deals from Washington to Belfast that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 24 April 2025.

Sat 23/823:59PDX - BHD

2 stops27h 31mBritish Airways

Sun 31/806:50BHD - PDX

1 stop18h 45mBritish Airways

Deal found 23/4£545

Wed 4/605:35SEA - BFS

3 stops29h 00mMultiple Airlines

Wed 11/606:10BFS - SEA

3 stops40h 53mMultiple Airlines

Deal found 22/4£609

Sun 4/513:55SEA - BHD

1 stop23h 20mDelta

Mon 12/517:25BHD - SEA

2 stops35h 24mDelta

Deal found 23/4£710

Fri 18/713:05PDX - BHD

1 stop24h 10mKLM

Fri 25/706:30BHD - PDX

2 stops18h 37mKLM

Deal found 23/4£858

Sat 7/619:35SEA - BHD

2 stops29h 40mAer Lingus

Sat 14/619:00BHD - SEA

2 stops30h 50mAer Lingus

Deal found 23/4£882

Sun 8/613:30SEA - BHD

1 stop15h 35mAmerican Airlines

Sun 15/606:50BHD - SEA

1 stop12h 40mAmerican Airlines

Deal found 24/4£891

Sat 23/815:20PDX - BFS

2 stops24h 10mMultiple Airlines

Sun 31/822:55BFS - PDX

3 stops45h 53mMultiple Airlines

Deal found 23/4£657

Sun 4/513:30SEA - BHD

1 stop14h 00mBritish Airways

Mon 12/519:30BHD - SEA

1 stop23h 40mBritish Airways

Deal found 23/4£663

Sat 7/605:35SEA - BHD

3 stops31h 35mMultiple Airlines

Sat 14/607:00BHD - SEA

3 stops40h 03mMultiple Airlines

Deal found 23/4£764

Fri 18/715:15PDX - BHD

2 stops22h 00mDelta

Fri 25/706:30BHD - PDX

2 stops20h 13mDelta

Deal found 23/4£861

Sat 23/815:20PDX - BHD

2 stops17h 50mMultiple Airlines

Sun 31/818:05BHD - PDX

3 stops31h 30mMultiple Airlines

Deal found 23/4£1,208

Sun 22/613:55SEA - BHD

1 stop20h 50mVirgin Atlantic

Thu 3/706:30BHD - SEA

1 stop13h 05mVirgin Atlantic

Deal found 22/4£3,566

Last-minute flights from Washington to Belfast
Discover last-minute flight deals from Washington to Belfast. Data last updated 24 April 2025 and is based on user searches.

Mon 28/419:00SEA - BFS

2 stops17h 25mMultiple Airlines

Wed 30/406:10BFS - SEA

2 stops22h 30mMultiple Airlines

Deal found 24/4£922

Wed 30/413:30SEA - BHD

1 stop14h 25mBritish Airways

Mon 12/519:30BHD - SEA

1 stop23h 40mBritish Airways

Deal found 23/4£663

Wed 30/413:30SEA - BHD

1 stop14h 25mIberia

Sat 10/507:05BHD - SEA

2 stops24h 04mIberia

Deal found 23/4£858

Wed 30/406:58SEA - BHD

2 stops20h 57mFinnair

Mon 12/515:25BHD - SEA

1 stop27h 45mFinnair

Deal found 23/4£910

Fri 2/520:20SEA - BHD

1 stop13h 55mAmerican Airlines

Sun 11/506:50BHD - SEA

1 stop19h 30mAmerican Airlines

Deal found 23/4£716

Fri 2/517:12SEA - BHD

2 stops15h 43mKLM

Mon 12/517:25BHD - SEA

1 stop26h 15mKLM

Deal found 23/4£743

Sat 3/505:30SEA - BHD

2 stops27h 25mDelta

Mon 12/517:25BHD - SEA

1 stop30h 32mDelta

Deal found 23/4£710

One-way flights from Washington to Belfast
Search for one-way flight options from Washington to Belfast. Find affordable one-way fares based on user searches. Data last updated 24 April 2025.

Sat 23/823:59PDX - BHD

2 stops27h 31mBritish Airways

Deal found 22/4£327

Sat 7/619:15SEA - BHD

2 stops39h 30mMultiple Airlines

Deal found 23/4£561

Sat 7/620:20SEA - BHD

1 stop14h 55mBritish Airways

Deal found 23/4£625

Fri 6/600:05SEA - BHD

2 stops28h 10mAer Lingus

Deal found 23/4£2,557

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sat 23/8

23:59-11:30

2 stops27h 31m

Belfast City

Sun 31/8

06:50-17:35

1 stop18h 45m

£545

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 4/6

05:35-18:35

3 stops29h 00m

Belfast Intl

Wed 11/6

06:10-15:03

3 stops40h 53m

£609

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Sat 23/8

15:20-23:30

2 stops24h 10m

Belfast Intl

Sun 31/8

22:55-12:48

3 stops45h 53m

£657

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 4/5

13:30-11:30

1 stop14h 00m

Belfast City

Mon 12/5

19:30-11:10

1 stop23h 40m

£663

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 4/5

13:55-21:15

1 stop23h 20m

Belfast City

Mon 12/5

17:25-20:49

2 stops35h 24m

£710

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/6

05:35-21:10

3 stops31h 35m

Belfast City

Sat 14/6

07:00-15:03

3 stops40h 03m

£764

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 18/7

13:05-21:15

1 stop24h 10m

Belfast City

Fri 25/7

06:30-17:07

2 stops18h 37m

£858

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 18/7

15:15-21:15

2 stops22h 00m

Belfast City

Fri 25/7

06:30-18:43

2 stops20h 13m

£861

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/6

19:35-09:15

2 stops29h 40m

Belfast City

Sat 14/6

19:00-17:50

2 stops30h 50m

£882

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 8/6

13:30-13:05

1 stop15h 35m

Belfast City

Sun 15/6

06:50-11:30

1 stop12h 40m

£891

Flights are sorted by cheapest return flights first.

Deals found on 22/4

Showing 1-10 of 16 results

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 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

Rainfall in Belfast by month

In terms of precipitation, rainfall in Belfast ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast when rainfall is around 50.0 mm.

Temperature in Belfast 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 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Belfast

Get a feel of what it's like to fly with Delta, KLM and Virgin Atlantic from Washington to Belfast by reading reviews from past customers. In addition to providing an overall rating, 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

Check prices

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

Check prices

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

1,333 reviews

Delta

8.0

Very Good

7,920 reviews

Check prices

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

Check prices

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

Check prices

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

Check prices

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

What are the most popular routes from State of Washington to Belfast?
When deciding which route to take from State of Washington to Belfast consider Seattle/Tacoma Intl - Belfast Intl, Seattle/Tacoma Intl - Belfast City or Portland - Belfast Intl as they are the most popular.
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 holiday 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, January is the cheapest month in which you can book a flight from State of Washington to Belfast (average of £67). Flying from State of Washington to Belfast in July is currently the most expensive (average of £90). 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

Alternative routes for Washington to Belfast

John F Kennedy Intl to Belfast Intl flights

John F Kennedy Intl to Belfast City flights

Newark to Belfast Intl flights

Orlando to Belfast Intl flights

Boston to Belfast Intl flights

O'Hare Intl to Belfast Intl flights

Boston to Belfast City flights

Miami to Belfast Intl flights

Orlando to Belfast City flights

Miami to Belfast City flights

Los Angeles to Belfast Intl flights

Atlanta to Belfast Intl flights

LaGuardia to Belfast City flights

Stewart to Belfast Intl flights

Los Angeles to Belfast City flights

Seattle to Belfast City flights

Dallas/Fort Worth to Belfast Intl flights

Hobby to Belfast City flights

Portland to Belfast Intl flights

Philadelphia to Belfast City flights

George Bush Intcntl to Belfast Intl flights

George Bush Intcntl to Belfast City flights

Portland to Belfast City flights

San Francisco to Belfast Intl flights

Denver to Belfast Intl flights

Raleigh to Belfast City flights

Minneapolis to Belfast Intl flights

Nashville to Belfast City flights

Fly with Cheapflights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Washington to Belfast. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Belfast from Washington.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Washington to Belfast, users can toggle the no change fees filter when performing a flight search.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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.

Cheap flights from Washington to Belfast from £327

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.

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 24 April 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Washington to Belfast

Cheapest flights from Washington to BelfastExplore 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 24 April 2025.

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 24 April 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington to Belfast that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from Washington to Belfast

Rainfall in Belfast by month

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

Temperature in Belfast by month

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

Reviews of airlines servicing Belfast

Get a feel of what it's like to fly with Delta, KLM and Virgin Atlantic from Washington to Belfast by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

How can I find direct flights from Washington to Belfast?

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

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

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.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 24 April 2025.