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Cheap flights from Washington to Northern Ireland from $331

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Northern Ireland departing on 2/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Washington to Northern Ireland

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
5:45 pm - 6:35 pmPDX-BHD
16h 50m1 stop
British Airways Logo
11:05 am - 11:32 pmBHD-PDX
20h 27m2 stops
$631British Airways
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Mon, Jan 19 - Thu, Jan 29
Virgin Atlantic Logo
3:05 pm - 4:50 pmSEA-BHD
17h 45m1 stop
Virgin Atlantic Logo
5:20 pm - 11:50 amBHD-SEA
26h 30m1 stop
$632Virgin Atlantic
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Wed, Dec 3 - Sun, Dec 7
American Airlines Logo
12:35 pm - 4:05 pmPDX-BHD
19h 30m2 stops
American Airlines Logo
6:35 am - 8:22 pmBHD-PDX
21h 47m2 stops
$634American Airlines
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Mon, Jan 19 - Thu, Jan 29
Delta Logo
11:35 am - 9:00 pmPDX-BHD
25h 25m2 stops
Delta Logo
6:30 am - 11:25 amBHD-PDX
12h 55m1 stop
$636Delta
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Wed, Dec 3 - Wed, Dec 10
KLM Logo
10:05 am - 4:50 pmPDX-BHD
22h 45m2 stops
KLM Logo
6:30 am - 11:25 amBHD-PDX
12h 55m1 stop
$637KLM
Find Deal
Thu, Dec 4 - Mon, Dec 15
Delta Logo
11:35 am - 9:00 pmPDX-BHD
25h 25m2 stops
Delta Logo
6:30 am - 3:33 pmBHD-PDX
17h 03m2 stops
$646Delta
Find Deal
Wed, Dec 3 - Wed, Dec 10
KLM Logo
3:05 pm - 9:00 pmSEA-BHD
21h 55m1 stop
KLM Logo
5:20 pm - 11:50 amBHD-SEA
26h 30m1 stop
$685KLM
Find Deal
Wed, Dec 3 - Sun, Dec 7
Multiple Airlines Logo
7:14 am - 10:20 amPDX-BHD
19h 06m2 stops
Multiple Airlines Logo
9:15 am - 3:55 pmBHD-PDX
14h 40m1 stop
$749Multiple Airlines
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Thu, Jan 1 - Wed, Feb 18
Multiple Airlines Logo
7:14 am - 10:20 amPDX-BHD
19h 06m2 stops
Multiple Airlines Logo
12:25 pm - 11:20 pmBHD-PDX
18h 55m2 stops
$759Multiple Airlines
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Thu, Jan 1 - Wed, Feb 18
American Airlines Logo
3:00 pm - 4:45 pmSEA-BHD
17h 45m2 stops
American Airlines Logo
8:45 am - 11:08 pmBHD-SEA
21h 23m2 stops
$794American Airlines
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Sat, Mar 7 - Tue, Mar 17

KLM flights from State of Washington to Northern Ireland

Our best KLM deals on State of Washington to Northern Ireland flight tickets
KLM
Dec 4
PDX10:05 amPortland
22h 45m
2 stops
BHD4:50 pmBelfast City
Dec 15
BHD6:30 amBelfast City
12h 55m
1 stop
PDX11:25 amPortland
$637
Find similar
KLM
Dec 3
SEA3:05 pmSeattle/Tacoma Intl
21h 55m
1 stop
BHD9:00 pmBelfast City
Dec 7
BHD5:20 pmBelfast City
26h 30m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$685
Find similar
KLM
Dec 3
SEA3:05 pmSeattle/Tacoma Intl
21h 55m
1 stop
BHD9:00 pmBelfast City
Dec 7
BHD5:20 pmBelfast City
37h 03m
2 stops
SEA10:23 pmSeattle/Tacoma Intl
$695
Find similar

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
Jan 19
PDX12:35 pmPortland
19h 30m
2 stops
BHD4:05 pmBelfast City
Jan 29
BHD6:35 amBelfast City
21h 47m
2 stops
PDX8:22 pmPortland
$634
Find similar
American Airlines
Mar 7
SEA3:00 pmSeattle/Tacoma Intl
17h 45m
2 stops
BHD4:45 pmBelfast City
Mar 17
BHD8:45 amBelfast City
21h 23m
2 stops
SEA11:08 pmSeattle/Tacoma Intl
$794
Find similar
American Airlines
Mar 27
SEA7:50 pmSeattle/Tacoma Intl
14h 25m
1 stop
BHD5:15 pmBelfast City
Mar 31
BHD6:35 amBelfast City
24h 33m
2 stops
SEA11:08 pmSeattle/Tacoma Intl
$979
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Northern Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 6, 2025.
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

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 1/19

5:45 pm-6:35 pm

1 stop16h 50m

Belfast City

Thu 1/29

11:05 am-11:32 pm

2 stops20h 27m

$631

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 12/3

3:05 pm-4:50 pm

1 stop17h 45m

Belfast City

Sun 12/7

5:20 pm-11:50 am

1 stop26h 30m

$632

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 1/19

12:35 pm-4:05 pm

2 stops19h 30m

Belfast City

Thu 1/29

6:35 am-8:22 pm

2 stops21h 47m

$634

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 12/3

11:35 am-9:00 pm

2 stops25h 25m

Belfast City

Wed 12/10

6:30 am-11:25 am

1 stop12h 55m

$636

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Thu 12/4

10:05 am-4:50 pm

2 stops22h 45m

Belfast City

Mon 12/15

6:30 am-11:25 am

1 stop12h 55m

$637

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 12/3

11:35 am-9:00 pm

2 stops25h 25m

Belfast City

Wed 12/10

6:30 am-3:33 pm

2 stops17h 03m

$646

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 12/3

3:05 pm-9:00 pm

1 stop21h 55m

Belfast City

Sun 12/7

5:20 pm-11:50 am

1 stop26h 30m

$685

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Thu 1/1

7:14 am-10:20 am

2 stops19h 06m

Belfast City

Wed 2/18

9:15 am-3:55 pm

1 stop14h 40m

$749

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Thu 1/1

7:14 am-10:20 am

2 stops19h 06m

Belfast City

Wed 2/18

12:25 pm-11:20 pm

2 stops18h 55m

$759

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

3:00 pm-4:45 pm

2 stops17h 45m

Belfast City

Tue 3/17

8:45 am-11:08 pm

2 stops21h 23m

$794

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Northern Ireland from

How to get the cheapest flight ticket from State of Washington to Northern Ireland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Northern Ireland?

The cheapest day to depart on your flight to Northern Ireland is on a Tuesday when prices can be found for as low as $724. This is often the case because there is less demand to fly during this day of the week. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from State of Washington to Northern Ireland for around $1,208.

What is the cheapest time of day to depart on your flight to Northern Ireland?

At noon is the cheapest time of day to fly from State of Washington to Northern Ireland when you can find flight prices for as low as $794. Flying to Northern Ireland at noon is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive with an average ticket price of $1,000.

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

Direct flights

None
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.
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  • 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?

  • 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 AirwaysPriceFrom $737Free CancellationRating
6.7
7,500 reviews
Search British Airways flights

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.

An easier way to manage your Northern Ireland trip

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Find better results for your trip to Northern Ireland

Popular cities in Northern Ireland

Popular flights according to clicks in the last 7 days on momondo
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Flights to Bristolfrom $431
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Flights to Liverpoolfrom $460
Flights to Aberdeenfrom $501
Flights to Leedsfrom $504