How long is the flight from State of Washington to Belfast?

Airlines like KLM, Virgin Atlantic, and Delta fly from State of Washington to Belfast in about 18h 05m. The time it takes to get you to your destination can typically vary by up to 8h 45m. There are 4472 mi between State of Washington and Belfast. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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.

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).

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 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.

£236+ Cheap Flights from Washington to Belfast

Cheap flight deals from Washington to Belfast

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 17 September 2026.

Mon 5/1007:15 -

2 stops18h 05m

Thu 22/1017:30 -

1 stop26h 22m

Deal found 14/9£614

Fri 16/1017:45 -

1 stop15h 10m

Fri 23/1009:50 -

1 stop14h 45m

Deal found 16/9£647

Sun 1/1113:40 -

1 stop19h 05m

Sat 7/1117:15 -

1 stop26h 25m

Deal found 15/9£648

Sat 12/1214:35 -

2 stops23h 00m

Wed 16/1208:30 -

2 stops16h 30m

Deal found 14/9£651

Sat 5/1223:17 -

2 stops25h 53m

Sat 12/1217:20 -

1 stop26h 20m

Deal found 14/9£651

Sat 12/1214:35 -

2 stops16h 40m

Wed 16/1207:25 -

2 stops17h 35m

Deal found 14/9£663

Mon 5/1020:20 -

1 stop15h 05m

Thu 22/1020:35 -

1 stop23h 00m

Deal found 16/9£674

Sun 20/915:55 -

2 stops32h 10m

Wed 23/920:15 -

1 stop30h 45m

Deal found 15/9£678

Mon 5/1015:14 -

2 stops16h 16m

Thu 22/1006:30 -

1 stop13h 05m

Deal found 16/9£686

Mon 5/1015:14 -

2 stops16h 16m

Thu 22/1012:45 -

2 stops19h 51m

Deal found 16/9£693

Sun 18/1010:30 -

2 stops23h 55m

Sat 24/1011:10 -

1 stop15h 50m

Deal found 15/9£705

Sun 1/1111:25 -

2 stops37h 45m

Sat 7/1109:40 -

2 stops40h 32m

Deal found 15/9£710

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 17 September 2026.

Mon 5/1007:15 -

2 stops18h 05m

Thu 22/1017:30 -

1 stop26h 22m

Deal found 14/9£614

Sat 5/1223:17 -

2 stops25h 53m

Sat 12/1217:20 -

1 stop26h 20m

Deal found 14/9£651

Sun 17/118:45 -

1 stop14h 05m

Thu 21/111:05 -

1 stop13h 45m

Deal found 16/9£683

Mon 5/1015:14 -

2 stops16h 16m

Thu 22/1006:30 -

1 stop13h 05m

Deal found 17/9£686

Mon 5/1015:14 -

2 stops16h 16m

Thu 22/1012:45 -

2 stops19h 51m

Deal found 14/9£694

Tue 5/114:25 -

1 stop18h 25m

Thu 14/117:20 -

1 stop26h 30m

Deal found 13/9£617

Mon 8/217:45 -

1 stop14h 20m

Fri 12/208:35 -

1 stop15h 15m

Deal found 12/9£683

Fri 29/113:20 -

1 stop19h 30m

Sun 7/217:20 -

1 stop26h 00m

Deal found 12/9£692

Sat 12/1214:35 -

2 stops23h 00m

Wed 16/1218:00 -

3 stops31h 00m

Deal found 14/9£695

Fri 16/1017:45 -

1 stop15h 10m

Fri 23/1009:50 -

1 stop14h 45m

Deal found 16/9£647

Mon 1/217:45 -

1 stop14h 20m

Fri 5/206:45 -

1 stop17h 05m

Deal found 15/9£683

Sun 18/1010:30 -

2 stops23h 55m

Sat 24/1011:10 -

1 stop15h 50m

Deal found 15/9£705

Mon 15/217:45 -

1 stop15h 40m

Fri 19/206:45 -

1 stop17h 05m

Deal found 13/9£683

Tue 5/118:50 -

1 stop17h 50m

Mon 11/114:00 -

1 stop34h 40m

Deal found 14/9£735

Mon 5/1010:31 -

2 stops18h 24m

Thu 22/1012:45 -

2 stops19h 51m

Deal found 17/9£700

Thu 15/1019:00 -

2 stops17h 35m

Wed 28/1021:10 -

3 stops26h 45m

Deal found 16/9£750

Thu 29/1015:35 -

3 stops21h 55m

Thu 5/1117:40 -

3 stops31h 20m

Deal found 14/9£799

Fri 16/1018:50 -

2 stops17h 55m

Fri 23/1009:40 -

2 stops34h 40m

Deal found 16/9£812

Tue 5/114:35 -

2 stops22h 20m

Thu 14/109:05 -

2 stops15h 55m

Deal found 13/9£854

Tue 22/1210:00 -

3 stops24h 50m

Mon 11/120:50 -

3 stops28h 10m

Deal found 15/9£1,206

Find flight deals from Washington to Belfast

Round-trip from	£614
One-way from	£236

KLM
5/10-22/10
3 total stops
44h 27m total
Washington to Belfast

Search Deals

24/10-31/12
3 total stops
53h 45m total
Washington to Belfast

Search Deals

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

Cheapest return flight

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sat 24/10

19:10-07:55

3 stops53h 45m

Belfast Intl

Wed 31/12

00:00-15:00

Nonstop0h 00m

£236

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sat 24/10

19:10-09:50

3 stops55h 40m

Belfast City

Wed 31/12

00:00-15:00

Nonstop0h 00m

£259

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Thu 11/2

18:45-18:45

1 stop16h 00m

Belfast City

Wed 31/12

00:00-15:00

Nonstop0h 00m

£279

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Thu 11/2

10:31-14:05

2 stops19h 34m

Belfast City

Wed 31/12

00:00-15:00

Nonstop0h 00m

£291

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Thu 11/2

14:35-21:00

3 stops22h 25m

Belfast City

Wed 31/12

00:00-15:00

Nonstop0h 00m

£326

Fastest return journey

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sat 24/10

19:45-15:15

1 stop12h 30m

Belfast City

Wed 31/12

00:00-15:00

Nonstop0h 00m

£362

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 5/10

07:15-09:20

2 stops18h 05m

Belfast City

Thu 22/10

17:30-11:52

1 stop26h 22m

£614

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Tue 5/1

14:25-16:50

1 stop18h 25m

Belfast City

Thu 14/1

17:20-11:50

1 stop26h 30m

£617

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Fri 16/10

17:45-16:55

1 stop15h 10m

Belfast City

Fri 23/10

09:50-16:35

1 stop14h 45m

£647

PortlandBelfast

PDX Portland - BHD Belfast City

PDXBHD

Portland

Sat 5/12

23:17-09:10

2 stops25h 53m

Belfast City

Sat 12/12

17:20-11:40

1 stop26h 20m

£651

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 26 resultsSorted by cheapest first

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.

SEA-BHD

PDX-BHD

SEA-BFS

PDX-BFS

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

USWA-BF1

SEA-BHD

PDX-BHD

SEA-BFS

PDX-BFS

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from State of Washington to Belfast?
Airlines like KLM, Virgin Atlantic, and Delta fly from State of Washington to Belfast in about 18h 05m. The time it takes to get you to your destination can typically vary by up to 8h 45m. There are 4472 mi between State of Washington and Belfast. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to Northern Ireland

Flights by cabin class

Other flight options

Popular flights

Alternative routes for Washington to Belfast

John F Kennedy Intl to Belfast Intl flights

Newark to Belfast Intl flights

Boston to Belfast Intl flights

John F Kennedy Intl to Belfast City flights

Boston to Belfast City flights

LaGuardia to Belfast City flights

Dallas/Fort Worth to Belfast Intl flights

Seattle to Belfast City flights

San Francisco to Belfast Intl flights

San Francisco to Belfast City flights

Raleigh to Belfast City flights

Orlando to Belfast Intl flights

Hobby to Belfast City flights

Los Angeles to Belfast Intl flights

Portland to Belfast Intl flights

Los Angeles to Belfast City flights

Philadelphia to Belfast City flights

Minneapolis to Belfast Intl flights

Portland to Belfast City flights

O'Hare Intl to Belfast Intl flights

Tampa to Belfast Intl flights

Minneapolis to Belfast City flights

Atlanta to Belfast Intl flights

Denver to Belfast Intl flights

George Bush Intcntl to Belfast City flights

Miami to Belfast Intl flights

Denver to Belfast City flights

Orlando to Belfast City flights

Miami to Belfast City flights

Austin to Belfast Intl 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 £236

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap 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 17 September 2026.

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 17 September 2026.

Best flights from Washington to BelfastDiscover 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 17 September 2026.

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 17 September 2026.

Last-minute flights from Washington to BelfastDiscover last-minute flight deals from Washington to Belfast. Data last updated 17 September 2026 and is based on user searches.

Discover last-minute flight deals from Washington to Belfast. Data last updated 17 September 2026 and is based on user searches.

One-way flights from Washington to BelfastSearch for one-way flight options from Washington to Belfast. Find affordable one-way fares based on user searches. Data last updated 17 September 2026.

Search for one-way flight options from Washington to Belfast. Find affordable one-way fares based on user searches. Data last updated 17 September 2026.

Find flight deals from Washington to Belfast

Round-trip from

One-way from

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

Related info for your journey

How long is the flight from State of Washington to Belfast?

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?

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.

Complete your trip

Complete your trip to Belfast by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Northern Ireland

Book a non-stop flight to one of these other cities located in Northern Ireland.

Search flights from Washington to Belfast by cabin class

Find flights from Washington to Belfast, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Washington and Belfast flights

Browse other Washington and Belfast flight options. Last updated on 17 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Fly with Cheapflights

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 17 September 2026.

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 17 September 2026.

Last-minute flights from Washington to Belfast
Discover last-minute flight deals from Washington to Belfast. Data last updated 17 September 2026 and is based on user searches.

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 17 September 2026.