What is the cheapest airline that flies from Washington to Northern Ireland?

British Airways and American Airlines are the most popular carriers operating 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 December 2025.

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.

$213 Cheap Flights from Washington to Northern Ireland in 2025/26

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Find the cheapest flights from Washington to Northern Ireland

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:35 pm - 2:15 pm

SEA

BHD

16h 40m1 stop

11:25 am - 5:55 pm

BHD

SEA

13h 30m1 stop

$602British Airways

Sat, Mar 7 - Wed, Mar 18

7:15 am - 2:15 pm

SEA

BHD

23h 00m2 stops

8:45 am - 5:55 pm

BHD

SEA

16h 10m1 stop

$622British Airways

Sat, Mar 7 - Tue, Mar 17

7:15 am - 2:15 pm

SEA

BHD

23h 00m2 stops

6:35 am - 12:24 am

BHD

SEA

24h 49m2 stops

$625British Airways

Sat, Mar 7 - Wed, Mar 18

1:35 pm - 10:30 am

SEA

BHD

12h 55m1 stop

6:35 am - 11:30 am

BHD

SEA

12h 55m1 stop

$627British Airways

Fri, Feb 20 - Tue, Feb 24

5:45 pm - 5:15 pm

PDX

BHD

15h 30m1 stop

7:25 pm - 3:55 pm

BHD

PDX

28h 30m1 stop

$627British Airways

Fri, Feb 20 - Tue, Feb 24

7:15 am - 11:10 am

SEA

BHD

19h 55m2 stops

8:45 am - 9:54 pm

BHD

SEA

20h 09m2 stops

$639American Airlines

Sat, Mar 7 - Tue, Mar 17

3:18 pm - 4:55 pm

PDX

BHD

17h 37m2 stops

5:30 pm - 11:10 am

BHD

PDX

25h 40m1 stop

$756KLM

Thu, Apr 16 - Sat, Apr 25

7:05 am - 9:10 am

PDX

BHD

18h 05m2 stops

11:25 am - 12:09 am

BHD

PDX

20h 44m2 stops

$834Multiple Airlines

Wed, Jan 14 - Wed, Jan 21

12:35 pm - 2:15 pm

PDX

BHD

17h 40m2 stops

6:35 am - 6:51 pm

BHD

PDX

20h 16m2 stops

$854American Airlines

Wed, Jan 14 - Wed, Jan 21

9:50 am - 7:20 pm

PDX

BFS

25h 30m3 stops

7:55 am - 12:34 am

BFS

PDX

24h 39m3 stops

$3,107Multiple Airlines

Wed, Feb 11 - Wed, Feb 18

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

Mar 7

SEA1:35 pmSeattle/Tacoma Intl

16h 40m

1 stop

BHD2:15 pmBelfast City

Mar 18

BHD11:25 amBelfast City

13h 30m

1 stop

SEA5:55 pmSeattle/Tacoma Intl

$602

Find similar

British Airways

Mar 7

SEA7:15 amSeattle/Tacoma Intl

23h 00m

2 stops

BHD2:15 pmBelfast City

Mar 17

BHD8:45 amBelfast City

16h 10m

1 stop

SEA5:55 pmSeattle/Tacoma Intl

$622

Find similar

British Airways

Mar 7

SEA7:15 amSeattle/Tacoma Intl

23h 00m

2 stops

BHD2:15 pmBelfast City

Mar 18

BHD6:35 amBelfast City

24h 49m

2 stops

SEA12:24 amSeattle/Tacoma Intl

$625

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

Mar 7

SEA7:15 amSeattle/Tacoma Intl

19h 55m

2 stops

BHD11:10 amBelfast City

Mar 17

BHD8:45 amBelfast City

20h 09m

2 stops

SEA9:54 pmSeattle/Tacoma Intl

$639

Find similar

American Airlines

Jan 14

PDX12:35 pmPortland

17h 40m

2 stops

BHD2:15 pmBelfast City

Jan 21

BHD6:35 amBelfast City

20h 16m

2 stops

PDX6:51 pmPortland

$854

Find similar

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

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

1:35 pm-2:15 pm

1 stop16h 40m

Belfast City

Wed 3/18

11:25 am-5:55 pm

1 stop13h 30m

$602

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

7:15 am-2:15 pm

2 stops23h 00m

Belfast City

Tue 3/17

8:45 am-5:55 pm

1 stop16h 10m

$622

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

7:15 am-2:15 pm

2 stops23h 00m

Belfast City

Wed 3/18

6:35 am-12:24 am

2 stops24h 49m

$625

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 2/20

1:35 pm-10:30 am

1 stop12h 55m

Belfast City

Tue 2/24

6:35 am-11:30 am

1 stop12h 55m

$627

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 2/20

5:45 pm-5:15 pm

1 stop15h 30m

Belfast City

Tue 2/24

7:25 pm-3:55 pm

1 stop28h 30m

$627

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

7:15 am-11:10 am

2 stops19h 55m

Belfast City

Tue 3/17

8:45 am-9:54 pm

2 stops20h 09m

$639

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Thu 4/16

3:18 pm-4:55 pm

2 stops17h 37m

Belfast City

Sat 4/25

5:30 pm-11:10 am

1 stop25h 40m

$756

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 1/14

7:05 am-9:10 am

2 stops18h 05m

Belfast City

Wed 1/21

11:25 am-12:09 am

2 stops20h 44m

$834

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 1/14

12:35 pm-2:15 pm

2 stops17h 40m

Belfast City

Wed 1/21

6:35 am-6:51 pm

2 stops20h 16m

$854

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Wed 2/11

9:50 am-7:20 pm

3 stops25h 30m

Belfast Intl

Wed 2/18

7:55 am-12:34 am

3 stops24h 39m

$3,107

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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

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

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 December 2025.
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.

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

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Find better results for your trip to Northern Ireland

Popular cities in Northern Ireland

Flights to Londonfrom $344

Flights to Manchesterfrom $389

Flights to Edinburghfrom $403

Flights to Birminghamfrom $405

Flights to Glasgowfrom $411

Flights to Newcastle upon Tynefrom $441

Flights to Belfastfrom $486

Flights to Bristolfrom $472

Flights to Invernessfrom $402

Flights to Liverpoolfrom $491

Flights to Aberdeenfrom $526

Flights to Leedsfrom $560

Cheap flights from Washington to Northern Ireland from $213

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 5/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Washington to Northern Ireland

Cheap round-trip flights

Cheap one-way flights

British Airways flights from State of Washington to Northern Ireland

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

American Airlines flights from State of Washington to Northern Ireland

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

momondo Fare Finder

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

See travel insights to Northern Ireland from

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

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

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

What is the cheapest airline that flies from Washington to Northern Ireland?

British Airways and American Airlines are the most popular carriers operating from Washington to Northern Ireland

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

Direct flights

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

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?

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

Why use momondo?

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

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

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

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

An easier way to manage your Northern Ireland trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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