In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

If weather is an important factor for your trip to State of Washington, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Belfast Intl Airport to State of Washington as you normally would.

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

Yes. In addition to deals on Belfast Intl to Washington flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Belfast Intl to Washington?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast Intl to Washington.

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

Yes. Cheapflights offers flight deals from Belfast Intl to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$608+ Flights from Belfast Intl Airport to Washington

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Cheap flight deals from Belfast Intl to Washington

Cheapest flights from Belfast Intl to Washington
Explore the most affordable flight options available from Belfast Intl to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

Thu 1/299:55 am

BFS

SEA

3 stops20h 11m

Multiple Airlines

Fri 2/62:35 pm

SEA

BFS

3 stops24h 10m

Multiple Airlines

Deal found 1/27

$1,186

Fri 3/136:30 am

BFS

SEA

2 stops22h 46m

Multiple Airlines

Fri 3/204:10 pm

SEA

BFS

2 stops22h 50m

Multiple Airlines

Deal found 1/27

$1,204

Thu 3/126:30 am

BFS

SEA

2 stops18h 30m

Multiple Airlines

Thu 3/198:10 am

SEA

BFS

3 stops23h 25m

Multiple Airlines

Deal found 1/25

$1,291

Best flights from Belfast Intl to Washington
Discover carefully curated flight deals from Belfast Intl to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 28, 2026.

Fri 3/136:30 am

BFS

SEA

2 stops22h 46m

Multiple Airlines

Fri 3/204:10 pm

SEA

BFS

2 stops22h 50m

Multiple Airlines

Deal found 1/27

$1,204

Thu 3/126:30 am

BFS

SEA

2 stops18h 30m

Multiple Airlines

Thu 3/198:10 am

SEA

BFS

3 stops23h 25m

Multiple Airlines

Deal found 1/25

$1,291

Last-minute flights from Belfast Intl to Washington
Discover last-minute flight deals from Belfast Intl to Washington. Data last updated January 28, 2026 and is based on user searches.

Thu 1/299:55 am

BFS

SEA

3 stops20h 11m

Multiple Airlines

Fri 2/62:35 pm

SEA

BFS

3 stops24h 10m

Multiple Airlines

Deal found 1/27

$1,186

One-way flights from Belfast Intl to Washington
Search for one-way flight options from Belfast Intl to Washington. Find affordable one-way fares based on user searches. Data last updated January 28, 2026.

Thu 7/238:40 pm

BFS

SEA

2 stops29h 15m

Multiple Airlines

Deal found 1/26

$608

Find flight deals from Belfast Intl to Washington

Round-trip from	$1,204 (Booking.com)
One-way from	$608 (Kiwi.com)

From Belfast Intl to Washington

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One-way flight from Belfast Intl to Washington

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Price

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Fri 3/13

6:30 am-10:16 pm

2 stops22h 46m

Seattle/Tacoma Intl

Fri 3/20

4:10 pm-10:00 pm

2 stops22h 50m

$1,204

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 3/12

6:30 am-6:00 pm

2 stops18h 30m

Seattle/Tacoma Intl

Thu 3/19

8:10 am-2:35 pm

3 stops23h 25m

$1,291

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 7/23

8:40 pm-5:55 pm

2 stops29h 15m

$608

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Best time to book a flight from Belfast Intl to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Belfast Intl with our price prediction graph.

Estimated round-trip price

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

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Related info for your journey

Can I find deals for flights from Belfast Intl to Washington that include hotel bookings?
Yes. In addition to deals on Belfast Intl to Washington flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Belfast Intl to Washington?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast Intl to Washington.
Can I find deals for business class flights from Belfast Intl to Washington?
Yes. Cheapflights offers flight deals from Belfast Intl to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

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$608+ Cheap flights from Belfast Intl (BFS) to Washington

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 7/23. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Belfast Intl to Washington with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Belfast Intl to Washington

Cheapest flights from Belfast Intl to WashingtonExplore the most affordable flight options available from Belfast Intl to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

Explore the most affordable flight options available from Belfast Intl to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

Find flight deals from Belfast Intl to Washington

Keep the following information in mind while searching for Belfast Intl to Washington flight deals. Data was last updated January 28, 2026.

Round-trip from

One-way from

Cheapflights Fare Finder

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

Best time to book a flight from Belfast Intl to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Belfast Intl with our price prediction graph.

Cheapflights Insights

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

Related info for your journey

Find useful and relevant information for your journey from Belfast Intl to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

How can I find direct flights from Belfast Intl to Washington?

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

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 Belfast Intl to Washington

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Travel Smart

Cheapest flights from Belfast Intl to Washington
Explore the most affordable flight options available from Belfast Intl to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.