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

For as low as £598, KLM can have you in State of Washington from Northern Ireland in 13h 40m. The distance between Northern Ireland and State of Washington is about 4472 mi. 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 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.

£547+ 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 12 September 2026.

Thu 1/1006:30 -

1 stop13h 05m

Wed 7/1020:20 -

1 stop14h 25m

Deal found 10/9£547

Thu 1/1009:50 -

1 stop14h 45m

Wed 7/1022:59 -

2 stops26h 21m

Deal found 10/9£576

Thu 15/1006:30 -

1 stop13h 05m

Mon 19/1020:20 -

1 stop15h 05m

Deal found 11/9£598

Thu 1/1017:30 -

2 stops37h 50m

Wed 7/1006:00 -

2 stops19h 20m

Deal found 10/9£659

Fri 23/1006:05 -

2 stops22h 35m

Fri 30/1015:35 -

2 stops18h 35m

Deal found 8/9£673

Sat 24/1007:20 -

2 stops21h 20m

Sat 31/1015:35 -

2 stops17h 20m

Deal found 9/9£752

Thu 1/1006:10 -

2 stops22h 30m

Wed 7/1019:00 -

3 stops20h 15m

Deal found 10/9£863

Find flight deals from Northern Ireland to Washington

Round-trip from	£547

British Airways
1/10-7/10
2 total stops
27h 30m total
Northern Ireland to Washington

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 1/10

09:50-16:35

1 stop14h 45m

Seattle/Tacoma Intl

Wed 7/10

22:59-09:20

2 stops26h 21m

£576

Fastest return journey

BelfastSeattle

BHD Belfast City - SEA Seattle/Tacoma Intl

BHDSEA

Belfast City

Thu 15/10

12:45-18:25

1 stop13h 40m

Seattle/Tacoma Intl

Mon 19/10

10:31-12:55

2 stops18h 24m

£598

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

£606

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Fri 23/10

06:05-20:40

2 stops22h 35m

Seattle/Tacoma Intl

Fri 30/10

15:35-17:10

2 stops18h 35m

£673

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Sat 24/10

07:20-20:40

2 stops21h 20m

Seattle/Tacoma Intl

Sat 31/10

15:35-15:55

2 stops17h 20m

£752

BelfastSeattle

BFS Belfast Intl - SEA Seattle/Tacoma Intl

BFSSEA

Belfast Intl

Thu 1/10

06:10-20:40

2 stops22h 30m

Seattle/Tacoma Intl

Wed 7/10

19:00-23:15

3 stops20h 15m

£863

Flights are sorted by cheapest return flights first.

Deals found on 10/9

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.

BHD-SEA

BFS-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

BHD-SEA

BFS-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 £598, KLM can have you in State of Washington from Northern Ireland in 13h 40m. The distance between Northern Ireland and State of Washington is about 4472 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to United States

Flights by cabin class

Other flight options

Popular flights

Return Flight Options

Top destinations

Alternative routes for Northern Ireland to Washington

Heathrow to Newark flights

Heathrow to John F Kennedy Intl flights

Gatwick to John F Kennedy Intl flights

Heathrow to LaGuardia flights

Stansted to John F Kennedy Intl flights

Gatwick to Newark flights

London City to John F Kennedy Intl flights

Luton to John F Kennedy Intl flights

Heathrow to Miami flights

Gatwick to LaGuardia flights

London City to Newark flights

Heathrow to Los Angeles flights

Heathrow to Orlando flights

Stansted to Newark flights

Manchester to John F Kennedy Intl flights

Luton to Newark flights

Heathrow to Dallas/Fort Worth flights

Heathrow to Boston flights

Heathrow to Las Vegas flights

Heathrow to San Francisco flights

Heathrow to O'Hare Intl flights

Manchester to Orlando flights

Gatwick to Orlando flights

Manchester to Newark flights

Manchester to LaGuardia flights

Gatwick to Los Angeles flights

Gatwick to Miami flights

Heathrow to Seattle flights

London City to Miami flights

London City to Los Angeles flights

Stansted to Orlando flights

Heathrow to Hobby flights

Heathrow to Dulles Intl flights

Stansted to Los Angeles flights

Stansted to Miami flights

Heathrow to Atlanta flights

London City to Orlando flights

Gatwick to Boston flights

Heathrow to Baltimore flights

London City to Boston flights

Heathrow to George Bush Intcntl flights

Edinburgh to Newark flights

Luton to Los Angeles flights

Stansted to Boston flights

Heathrow to Ontario flights

Luton to LaGuardia flights

Gatwick to San Francisco flights

Heathrow to Tampa flights

Luton to Miami flights

Heathrow to Fort Lauderdale flights

Fly with Cheapflights

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.

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

Of course! You can now track prices for flights from Northern Ireland to Washington and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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 Northern Ireland to Washington from £547

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/10. 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 12 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 12 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 12 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 12 September 2026.

Last-minute flights from Northern Ireland to WashingtonDiscover last-minute flight deals from Northern Ireland to Washington. Data last updated 12 September 2026 and is based on user searches.

Discover last-minute flight deals from Northern Ireland to Washington. Data last updated 12 September 2026 and is based on user searches.

Find flight deals from Northern Ireland to Washington

Round-trip from

Cheapflights Fare Finder

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 12 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

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?

100% Free

Book with Flexibility

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 12 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 12 September 2026.

Last-minute flights from Northern Ireland to Washington
Discover last-minute flight deals from Northern Ireland to Washington. Data last updated 12 September 2026 and is based on user searches.