How do I get Price Alerts for flights from State of Washington to Northern Ireland?

Search flight deals from State of Washington to Northern Ireland . While viewing offers you’ll have the option to create a Price Alert.

How can I save money on flights from State of Washington to Northern Ireland with momondo?

Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

How does momondo find its flight prices?

We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

When did momondo last update prices for flights from Washington to Northern Ireland?

Prices for flights from Washington to Northern Ireland are updated daily.

How many operators does momondo search for flights from Washington to Northern Ireland?

The number of operators available for flights from Washington to Northern Ireland is 1 as of August 2026.

How old do you have to be to fly from Washington to Northern Ireland?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Northern Ireland.

What documentation or ID do you need to fly to Northern Ireland?

The required travel and health documents for your Northern Ireland trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Northern Ireland. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$284 Cheap Flights from Washington to Northern Ireland in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington to Northern Ireland

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 pm - 9:05 pmSEA Seattle/Tacoma Intl-BFS Belfast Intl

18h 05m2 stops Reykjavik Keflavik Intl London Gatwick

8:20 am - 8:40 pmBFS Belfast Intl-SEA Seattle/Tacoma Intl

20h 20m2 stops London Gatwick Reykjavik Keflavik Intl

$907Multiple Airlines

Tue, Sep 22 - Tue, Sep 29

6:45 pm - 6:40 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 55m1 stop London Heathrow

9:15 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

15h 35m1 stop London Heathrow

$908British Airways

Sun, Nov 15 - Wed, Nov 18

5:45 pm - 4:50 pmPDX Portland-BHD Belfast City

15h 05m1 stop London Heathrow

4:55 pm - 3:50 pmBHD Belfast City-PDX Portland

30h 55m1 stop London Heathrow

$917British Airways

Sun, Jan 31 - Tue, Feb 2

5:45 pm - 5:25 pmPDX Portland-BHD Belfast City

15h 40m1 stop London Heathrow

8:45 am - 3:50 pmBHD Belfast City-PDX Portland

15h 05m1 stop London Heathrow

$918British Airways

Mon, Jan 11 - Fri, Jan 15

5:45 pm - 4:50 pmPDX Portland-BHD Belfast City

15h 05m1 stop London Heathrow

4:55 pm - 3:50 pmBHD Belfast City-PDX Portland

30h 55m1 stop London Heathrow

$918British Airways

Sun, Jan 31 - Tue, Feb 2

8:20 pm - 7:25 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 05m1 stop London Heathrow

12:45 pm - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

$946British Airways

Mon, Oct 5 - Thu, Oct 22

1:30 pm - 12:55 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 25m1 stop London Heathrow

12:45 pm - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

$946British Airways

Mon, Oct 5 - Thu, Oct 22

8:20 pm - 7:25 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 05m1 stop London Heathrow

12:45 pm - 6:25 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 40m1 stop London Heathrow

$955British Airways

Mon, Oct 5 - Thu, Oct 22

7:00 pm - 11:20 pmSEA Seattle/Tacoma Intl-BFS Belfast Intl

20h 20m3 stops Reykjavik Keflavik Intl Glasgow Intl London Luton

6:15 am - 8:40 pmBFS Belfast Intl-SEA Seattle/Tacoma Intl

22h 25m2 stops London Gatwick Reykjavik Keflavik Intl

$958Multiple Airlines

Tue, Sep 22 - Tue, Sep 29

3:14 pm - 3:30 pmSEA Seattle/Tacoma Intl-BHD Belfast City

16h 16m2 stops Chicago O'Hare Intl London Heathrow

2:20 pm - 11:35 amBHD Belfast City-SEA Seattle/Tacoma Intl

29h 15m1 stop London Heathrow

$971American Airlines

Mon, Oct 5 - Thu, Oct 22

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British Airways flights from State of Washington to Northern Ireland

Our best British Airways deals on State of Washington to Northern Ireland flight tickets

British Airways

Nov 15

SEA6:45 pmSeattle/Tacoma Intl

15h 55m

1 stop

BHD6:40 pmBelfast City

Nov 18

BHD9:15 amBelfast City

15h 35m

1 stop

SEA4:50 pmSeattle/Tacoma Intl

$908

British Airways

Jan 31

PDX5:45 pmPortland

15h 05m

1 stop

BHD4:50 pmBelfast City

Feb 2

BHD4:55 pmBelfast City

30h 55m

1 stop

PDX3:50 pmPortland

$917

British Airways

Oct 5

SEA8:20 pmSeattle/Tacoma Intl

15h 05m

1 stop

BHD7:25 pmBelfast City

Oct 22

BHD12:45 pmBelfast City

13h 40m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

$946

American Airlines flights from State of Washington to Northern Ireland

Our best American Airlines deals on State of Washington to Northern Ireland flight tickets

American Airlines

Oct 5

SEA3:14 pmSeattle/Tacoma Intl

16h 16m

2 stops

BHD3:30 pmBelfast City

Oct 22

BHD2:20 pmBelfast City

29h 15m

1 stop

SEA11:35 amSeattle/Tacoma Intl

$971

American Airlines

Jan 29

PDX1:12 pmPortland

17h 03m

2 stops

BHD2:15 pmBelfast City

Feb 7

BHD6:30 amBelfast City

17h 20m

1 stop

PDX3:50 pmPortland

$1,020

American Airlines

Sep 6

SEA8:20 pmSeattle/Tacoma Intl

13h 20m

1 stop

BHD5:40 pmBelfast City

Sep 13

BHD11:00 amBelfast City

18h 36m

2 stops

SEA9:36 pmSeattle/Tacoma Intl

$1,026

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Tue 9/22

7:00 pm-9:05 pm

2 stops18h 05m

Belfast Intl

Tue 9/29

8:20 am-8:40 pm

2 stops20h 20m

$907

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 11/15

6:45 pm-6:40 pm

1 stop15h 55m

Belfast City

Wed 11/18

9:15 am-4:50 pm

1 stop15h 35m

$908

PortlandBelfast

PDX Portland - BHD Belfast City

PDXBHD

Portland

Sun 1/31

5:45 pm-4:50 pm

1 stop15h 05m

Belfast City

Tue 2/2

4:55 pm-3:50 pm

1 stop30h 55m

$917

PortlandBelfast

PDX Portland - BHD Belfast City

PDXBHD

Portland

Mon 1/11

5:45 pm-5:25 pm

1 stop15h 40m

Belfast City

Fri 1/15

8:45 am-3:50 pm

1 stop15h 05m

$918

PortlandBelfast

PDX Portland - BHD Belfast City

PDXBHD

Portland

Sun 1/31

5:45 pm-4:50 pm

1 stop15h 05m

Belfast City

Tue 2/2

4:55 pm-3:50 pm

1 stop30h 55m

$918

Quickest round-trip

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-7:25 pm

1 stop15h 05m

Belfast City

Thu 10/22

12:45 pm-6:25 pm

1 stop13h 40m

$946

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

1:30 pm-12:55 pm

1 stop15h 25m

Belfast City

Thu 10/22

12:45 pm-6:25 pm

1 stop13h 40m

$946

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

8:20 pm-7:25 pm

1 stop15h 05m

Belfast City

Thu 10/22

12:45 pm-6:25 pm

1 stop13h 40m

$955

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Tue 9/22

7:00 pm-11:20 pm

3 stops20h 20m

Belfast Intl

Tue 9/29

6:15 am-8:40 pm

2 stops22h 25m

$958

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 10/5

3:14 pm-3:30 pm

2 stops16h 16m

Belfast City

Thu 10/22

2:20 pm-11:35 am

1 stop29h 15m

$971

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

Cheap State of Washington to Northern Ireland flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Northern Ireland

Fastest flight time	12h 30m
Direct flights	None

The fastest flight from State of Washington to Northern Ireland takes 12h 30m

There are no direct flights from State of Washington to Northern Ireland. There are no popular flight routes from State of Washington to Northern Ireland.

Search flight deals

Frequently asked questions about flying from Washington to Northern Ireland

When did momondo last update prices for flights from Washington to Northern Ireland?
Prices for flights from Washington to Northern Ireland are updated daily.
How many operators does momondo search for flights from Washington to Northern Ireland?
The number of operators available for flights from Washington to Northern Ireland is 1 as of August 2026.
How old do you have to be to fly from Washington to Northern Ireland?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Northern Ireland.
What documentation or ID do you need to fly to Northern Ireland?
The required travel and health documents for your Northern Ireland trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Northern Ireland. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from State of Washington to Northern Ireland

Compare and see reviews for airlines that fly from State of Washington to Northern Ireland with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $822	Free Cancellation	Rating 6.7 8,157 reviews		Search British Airways flights

Frequently asked questions about flying from Washington to Northern Ireland

How do I get Price Alerts for flights from State of Washington to Northern Ireland?
Search flight deals from State of Washington to Northern Ireland. While viewing offers you’ll have the option to create a Price Alert.
How can I save money on flights from State of Washington to Northern Ireland with momondo?
Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.
How does momondo find its flight prices?
We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Northern Ireland?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington to Northern Ireland. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington to Northern Ireland with flexible booking policies on momondo?

Yes. All flights to Northern Ireland from Washington on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington to Northern Ireland?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Northern Ireland from Washington.

I’m not ready to book a flight from Washington to Northern Ireland right now. Can momondo alert me if prices change?

Price alerts on flights to Northern Ireland from Washington are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.