How long is the flight from Northern Ireland to State of Washington?

For as low as £601, British Airways can have you in State of Washington from Northern Ireland in 13h 05m. The distance between Northern Ireland and State of Washington is about 4472 mi.

In terms of precipitation, rainfall in State of Washington ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit State of Washington when rainfall is around 18.0 mm.

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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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

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

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

Yes. In addition to deals on Northern Ireland to Washington flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Northern Ireland to Washington?

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

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

Yes. Cheapflights offers flight deals from Northern Ireland 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.

£491+ Cheap Flights from Northern Ireland to Washington

Cheap flight deals from Northern Ireland to Washington

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

Cheapest flights from Northern Ireland to Washington
Explore the most affordable flight options available from Northern Ireland to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 September 2026.

Mon 12/1010:00 -

1 stop18h 14m

Mon 19/1017:30 -

1 stop17h 20m

Deal found 18/9£491

Thu 5/1109:05 -

2 stops15h 55m

Thu 12/1114:35 -

2 stops20h 10m

Deal found 21/9£590

Thu 15/1014:20 -

1 stop29h 15m

Mon 19/1020:20 -

1 stop16h 15m

Deal found 21/9£600

Wed 4/1113:20 -

3 stops34h 35m

Wed 11/1114:35 -

2 stops21h 45m

Deal found 20/9£654

Find flight deals from Northern Ireland to Washington

Round-trip from	£510

12/10-19/10
2 total stops
40h 14m total
Northern Ireland to Washington

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

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Route

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Return

Price

Cheapest return flight

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Mon 12/10

10:00-20:14

1 stop18h 14m

Seattle/Tacoma Intl

Mon 19/10

17:30-18:50

1 stop17h 20m

£491

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Thu 5/11

09:05-17:00

2 stops15h 55m

Seattle/Tacoma Intl

Thu 12/11

14:35-18:45

2 stops20h 10m

£590

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 15/10

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Mon 19/10

06:12-12:55

2 stops22h 43m

£601

Fastest return journey

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 14/1

06:30-16:50

1 stop18h 20m

Seattle/Tacoma Intl

Sun 17/1

18:45-16:50

1 stop14h 05m

£610

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Wed 4/11

13:20-15:55

3 stops34h 35m

Seattle/Tacoma Intl

Wed 11/11

14:35-20:20

2 stops21h 45m

£654

Flights are sorted by cheapest return flights first.

Deals found on 18/9

Sorted by cheapest first

Best time to book a flight from Northern Ireland to Washington

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

BFS-SEA

BHD-SEA

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 Northern Ireland to Washington

GBNIR-USWA

BFS-SEA

BHD-SEA

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

Related info for your journey

How long is the flight from Northern Ireland to State of Washington?
For as low as £601, British Airways can have you in State of Washington from Northern Ireland in 13h 05m. The distance between Northern Ireland and State of Washington is about 4472 mi.
Can I find deals for flights from Northern Ireland to Washington that include hotel bookings?
Yes. In addition to deals on Northern Ireland to Washington flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Northern Ireland to Washington?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Northern Ireland to Washington.
Can I find deals for business class flights from Northern Ireland to Washington?
Yes. Cheapflights offers flight deals from Northern Ireland 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.

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How does Cheapflights help users find flights from Northern Ireland to Washington?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Northern Ireland to Washington. 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 Northern Ireland to Washington?

Millions of users choose and trust Cheapflights to book the best flight deals from Northern Ireland to Washington for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes, we can. To see specific flights from Northern Ireland to Washington with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Cheap flights from Northern Ireland to Washington from £491

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Northern Ireland to Washington

Cheapest flights from Northern Ireland to WashingtonExplore the most affordable flight options available from Northern Ireland to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 September 2026.

Explore the most affordable flight options available from Northern Ireland to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 September 2026.

Best flights from Northern Ireland to WashingtonDiscover carefully curated flight deals from Northern Ireland to Washington that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 September 2026.

Discover carefully curated flight deals from Northern Ireland to Washington that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 September 2026.

Last-minute flights from Northern Ireland to WashingtonDiscover last-minute flight deals from Northern Ireland to Washington. Data last updated 23 September 2026 and is based on user searches.

Discover last-minute flight deals from Northern Ireland to Washington. Data last updated 23 September 2026 and is based on user searches.

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

Best time to book a flight from Northern Ireland to Washington

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

Cheapflights Insights

Related info for your journey

How long is the flight from Northern Ireland to State of Washington?

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

How can I find direct flights from Northern Ireland to Washington?

Can I find deals for business class flights from Northern Ireland 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 Northern Ireland to Washington

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

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

Direct flights to United States

Book a non-stop flight to one of these other cities located in United States.

Search flights from Northern Ireland to Washington by cabin class

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

Northern Ireland and Washington flights

Browse other Northern Ireland and Washington flight options. Last updated on 23 September 2026.

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Find a return flight route from Washington

Find the right flight back to Northern Ireland after your stay in Washington

Northern Ireland to Washington flights

Consider these flights travelling from Northern Ireland to Washington.

Fly with Cheapflights

How does Cheapflights help users find flights from Northern Ireland to Washington?

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

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

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

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Travel Smart

Cheapest flights from Northern Ireland to Washington
Explore the most affordable flight options available from Northern Ireland to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 September 2026.

Best flights from Northern Ireland to Washington
Discover carefully curated flight deals from Northern Ireland to Washington that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 23 September 2026.

Last-minute flights from Northern Ireland to Washington
Discover last-minute flight deals from Northern Ireland to Washington. Data last updated 23 September 2026 and is based on user searches.