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

For as low as $604, British Airways can have you in Belfast from State of Washington in 16h 50m. There are 4472 mi between State of Washington and Belfast.

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.

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).

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.

$278+ Flights from Washington to Belfast

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Cheap 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 diciembre 17, 2025.

sáb. 12/203:05 pmSEA - BHD

1 stop17h 45mMultiple Airlines

lun. 12/225:20 pmBHD - SEA

1 stop26h 30mMultiple Airlines

Deal found 12/16

$2,438

sáb. 12/203:40 pmSEA - BFS

3 stops22h 40mMultiple Airlines

lun. 12/2210:50 amBFS - SEA

3 stops43h 26mMultiple Airlines

Deal found 12/16

$2,716

Best flights from Washington to Belfast
Discover carefully curated flight deals from Washington to Belfast that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated diciembre 17, 2025.

sáb. 3/76:50 pmSEA - BHD

1 stop16h 50mBritish Airways

mar. 3/178:45 amBHD - SEA

1 stop16h 10mBritish Airways

Deal found 12/15

$604

vie. 1/302:35 pmSEA - BFS

2 stops23h 25mMultiple Airlines

vie. 2/68:05 amBFS - SEA

2 stops16h 55mMultiple Airlines

Deal found 12/16

$605

mié. 1/141:30 pmPDX - BHD

2 stops19h 20mKLM

mié. 1/215:20 pmBHD - PDX

2 stops33h 53mKLM

Deal found 12/15

$661

sáb. 3/76:50 pmSEA - BHD

1 stop16h 50mBritish Airways

mié. 3/186:35 amBHD - SEA

1 stop18h 20mBritish Airways

Deal found 12/15

$604

mié. 1/1411:10 amPDX - BHD

2 stops21h 40mMultiple Airlines

mié. 1/215:20 pmBHD - PDX

2 stops32h 15mMultiple Airlines

Deal found 12/16

$661

lun. 1/125:45 pmPDX - BHD

1 stop12h 30mBritish Airways

lun. 1/196:35 amBHD - PDX

1 stop17h 20mBritish Airways

Deal found 12/15

$604

mié. 1/145:45 pmPDX - BHD

1 stop12h 30mBritish Airways

mié. 1/216:35 amBHD - PDX

1 stop17h 20mBritish Airways

Deal found 12/15

$604

mar. 3/179:57 amPDX - BHD

2 stops23h 53mMultiple Airlines

mar. 3/319:50 amBHD - PDX

1 stop33h 20mMultiple Airlines

Deal found 12/16

$675

jue. 1/292:35 pmSEA - BFS

2 stops23h 45mMultiple Airlines

jue. 2/56:30 amBFS - SEA

2 stops18h 30mMultiple Airlines

Deal found 12/15

$679

mié. 2/115:45 pmPDX - BHD

1 stop12h 30mBritish Airways

dom. 2/156:30 amBHD - PDX

1 stop17h 25mBritish Airways

Deal found 12/16

$624

mar. 3/172:05 pmPDX - BHD

2 stops21h 35mBritish Airways

mar. 3/316:35 amBHD - PDX

2 stops24h 55mBritish Airways

Deal found 12/16

$650

sáb. 12/203:40 pmSEA - BFS

3 stops22h 40mMultiple Airlines

lun. 12/2210:50 amBFS - SEA

3 stops43h 26mMultiple Airlines

Deal found 12/16

$2,716

Last-minute flights from Washington to Belfast
Discover last-minute flight deals from Washington to Belfast. Data last updated diciembre 17, 2025 and is based on user searches.

sáb. 12/203:05 pmSEA - BHD

1 stop17h 45mMultiple Airlines

lun. 12/225:20 pmBHD - SEA

1 stop26h 30mMultiple Airlines

Deal found 12/16

$2,438

sáb. 12/203:40 pmSEA - BFS

3 stops22h 40mMultiple Airlines

lun. 12/2210:50 amBFS - SEA

3 stops43h 26mMultiple Airlines

Deal found 12/16

$2,716

lun. 1/126:00 amPDX - BHD

2 stops24h 15mBritish Airways

lun. 1/199:15 amBHD - PDX

1 stop14h 40mBritish Airways

Deal found 12/15

$620

lun. 1/123:15 pmPDX - BHD

2 stops20h 40mMultiple Airlines

lun. 1/197:00 amBHD - PDX

3 stops25h 39mMultiple Airlines

Deal found 12/15

$1,568

mié. 1/145:45 pmPDX - BHD

1 stop12h 30mBritish Airways

mié. 1/216:35 amBHD - PDX

1 stop17h 20mBritish Airways

Deal found 12/16

$604

mié. 1/141:30 pmPDX - BHD

2 stops19h 20mKLM

mié. 1/215:20 pmBHD - PDX

2 stops33h 53mKLM

Deal found 12/15

$661

mié. 1/145:51 pmPDX - BHD

3 stops40h 59mMultiple Airlines

mié. 1/2112:25 pmBHD - PDX

3 stops40h 23mMultiple Airlines

Deal found 12/15

$12,485

vie. 1/302:35 pmSEA - BFS

2 stops23h 25mMultiple Airlines

vie. 2/68:05 amBFS - SEA

2 stops16h 55mMultiple Airlines

Deal found 12/16

$605

vie. 1/301:35 pmSEA - BHD

1 stop12h 55mBritish Airways

mar. 2/36:35 amBHD - SEA

1 stop12h 55mBritish Airways

Deal found 12/16

$624

sáb. 1/312:35 pmSEA - BFS

2 stops14h 55mMultiple Airlines

sáb. 2/77:00 amBFS - SEA

2 stops18h 00mMultiple Airlines

Deal found 12/17

$686

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 diciembre 17, 2025.

lun. 2/211:55 amSEA - BFS

3 stops38h 50mMultiple Airlines

Deal found 12/16

$278

lun. 2/211:55 amSEA - BHD

3 stops24h 35mMultiple Airlines

Deal found 12/16

$293

lun. 3/239:35 pmSEA - BHD

2 stops35h 40mMultiple Airlines

Deal found 12/15

$325

lun. 3/237:50 pmSEA - BHD

1 stop13h 15mBritish Airways

Deal found 12/15

$387

lun. 2/26:50 pmSEA - BHD

1 stop31h 40mBritish Airways

Deal found 12/16

$413

Find flight deals from Washington to Belfast

Round-trip from	$604 (Cheapflightsfares)
One-way from	$278 (Kiwi.com)
Popular in	December
Cheapest in	April
Average price	$1,583

From Washington to Belfast

Search Deals

One-way flight from Washington to Belfast

Search Deals

Highest demand for flights based on searches. 11% potential increase in price ($128 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease ($59 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

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

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

sáb. 3/7

6:50 pm-7:40 pm

1 stop16h 50m

Belfast City

mar. 3/17

8:45 am-5:55 pm

1 stop16h 10m

$604

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

sáb. 3/7

6:50 pm-7:40 pm

1 stop16h 50m

Belfast City

mié. 3/18

6:35 am-5:55 pm

1 stop18h 20m

$604

PortlandBelfast

PDX - BHD

PDXBHD

Portland

lun. 1/12

5:45 pm-2:15 pm

1 stop12h 30m

Belfast City

lun. 1/19

6:35 am-3:55 pm

1 stop17h 20m

$604

PortlandBelfast

PDX - BHD

PDXBHD

Portland

mié. 1/14

5:45 pm-2:15 pm

1 stop12h 30m

Belfast City

mié. 1/21

6:35 am-3:55 pm

1 stop17h 20m

$604

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

vie. 1/30

2:35 pm-10:00 pm

2 stops23h 25m

Belfast Intl

vie. 2/6

8:05 am-5:00 pm

2 stops16h 55m

$605

PortlandBelfast

PDX - BHD

PDXBHD

Portland

mié. 2/11

5:45 pm-2:15 pm

1 stop12h 30m

Belfast City

dom. 2/15

6:30 am-3:55 pm

1 stop17h 25m

$624

PortlandBelfast

PDX - BHD

PDXBHD

Portland

mar. 3/17

2:05 pm-6:40 pm

2 stops21h 35m

Belfast City

mar. 3/31

6:35 am-11:30 pm

2 stops24h 55m

$650

PortlandBelfast

PDX - BHD

PDXBHD

Portland

mié. 1/14

1:30 pm-4:50 pm

2 stops19h 20m

Belfast City

mié. 1/21

5:20 pm-7:13 pm

2 stops33h 53m

$661

PortlandBelfast

PDX - BHD

PDXBHD

Portland

mié. 1/14

11:10 am-4:50 pm

2 stops21h 40m

Belfast City

mié. 1/21

5:20 pm-5:35 pm

2 stops32h 15m

$661

PortlandBelfast

PDX - BHD

PDXBHD

Portland

mar. 3/17

9:57 am-4:50 pm

2 stops23h 53m

Belfast City

mar. 3/31

9:50 am-11:10 am

1 stop33h 20m

$675

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 15 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 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?

When flying from State of Washington to Belfast, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 20% versus a flight in the afternoon.

Related info for your journey

How long is the flight from State of Washington to Belfast?
For as low as $604, British Airways can have you in Belfast from State of Washington in 16h 50m. There are 4472 mi between State of Washington and Belfast.
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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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$278+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington to Belfast with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 diciembre 17, 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 diciembre 17, 2025.

Find flight deals from Washington to Belfast

Keep the following information in mind while searching for Washington to Belfast flight deals. Data was last updated diciembre 17, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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

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 diciembre 17, 2025.

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.

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?

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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 diciembre 17, 2025.