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Cheap flights from Northern Ireland to Seattle from £526

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Northern Ireland to Seattle departing on 4/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Northern Ireland to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
British Airways Logo
11:25 - 16:55
BHD
-
SEA
13h 30m1 stop
British Airways Logo
14:10 - 10:40
SEA
-
BHD
36h 30m2 stops
£526British Airways
ons, 4 feb - sön, 8 feb
British Airways Logo
12:25 - 16:55
BHD
-
SEA
12h 30m1 stop
British Airways Logo
14:10 - 10:40
SEA
-
BHD
36h 30m2 stops
£529British Airways
ons, 4 feb - sön, 8 feb
British Airways Logo
06:35 - 22:07
BHD
-
SEA
23h 32m2 stops
British Airways Logo
14:10 - 10:40
SEA
-
BHD
36h 30m2 stops
£529British Airways
ons, 4 feb - sön, 8 feb
British Airways Logo
06:35 - 22:07
BHD
-
SEA
23h 32m2 stops
British Airways Logo
14:10 - 10:40
SEA
-
BHD
36h 30m2 stops
£532British Airways
ons, 4 feb - sön, 8 feb
British Airways Logo
06:35 - 11:30
BHD
-
SEA
12h 55m1 stop
British Airways Logo
19:50 - 18:35
SEA
-
BHD
15h 45m1 stop
£533British Airways
lör, 7 mar - mån, 9 mar
British Airways Logo
15:25 - 11:35
BHD
-
SEA
28h 10m1 stop
British Airways Logo
20:20 - 17:15
SEA
-
BHD
12h 55m1 stop
£534British Airways
mån, 13 apr - lör, 9 maj
British Airways Logo
06:35 - 16:55
BHD
-
SEA
18h 20m1 stop
British Airways Logo
13:37 - 14:15
SEA
-
BHD
17h 38m2 stops
£535British Airways
lör, 7 mar - mån, 9 mar
British Airways Logo
06:35 - 23:04
BHD
-
SEA
24h 29m2 stops
British Airways Logo
07:15 - 10:40
SEA
-
BHD
20h 25m2 stops
£537British Airways
lör, 7 mar - mån, 9 mar
Multiple Airlines Logo
06:30 - 09:15
BFS
-
SEA
34h 45m3 stops
Multiple Airlines Logo
14:35 - 21:05
SEA
-
BFS
22h 30m3 stops
£666Multiple Airlines
ons, 28 jan - tors, 29 jan
Multiple Airlines Logo
06:30 - 22:16
BFS
-
SEA
23h 46m2 stops
Multiple Airlines Logo
14:35 - 21:05
SEA
-
BFS
22h 30m3 stops
£732Multiple Airlines
ons, 28 jan - tors, 29 jan

British Airways flights from Northern Ireland to Seattle

Our best British Airways deals on Northern Ireland to Seattle flight tickets
British Airways
4 Feb
BHD11:25Belfast City
13h 30m
1 stop
SEA16:55Seattle/Tacoma Intl
8 Feb
SEA14:10Seattle/Tacoma Intl
36h 30m
2 stops
BHD10:40Belfast City
£526
Find similar
British Airways
4 Feb
BHD12:25Belfast City
12h 30m
1 stop
SEA16:55Seattle/Tacoma Intl
8 Feb
SEA14:10Seattle/Tacoma Intl
36h 30m
2 stops
BHD10:40Belfast City
£529
Find similar
British Airways
4 Feb
BHD06:35Belfast City
23h 32m
2 stops
SEA22:07Seattle/Tacoma Intl
8 Feb
SEA14:10Seattle/Tacoma Intl
36h 30m
2 stops
BHD10:40Belfast City
£529
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Northern Ireland to Seattle 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 279,928 searches. Data last updated 8 januari 2026.
Use the filters below to find and compare flights from Northern Ireland to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

ons 4/2

11:25-16:55

1 stop13h 30m

Seattle/Tacoma Intl

sön 8/2

14:10-10:40

2 stops36h 30m

£526

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

ons 4/2

12:25-16:55

1 stop12h 30m

Seattle/Tacoma Intl

sön 8/2

14:10-10:40

2 stops36h 30m

£529

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

ons 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

sön 8/2

14:10-10:40

2 stops36h 30m

£529

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

ons 4/2

06:35-22:07

2 stops23h 32m

Seattle/Tacoma Intl

sön 8/2

14:10-10:40

2 stops36h 30m

£532

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

lör 7/3

06:35-11:30

1 stop12h 55m

Seattle/Tacoma Intl

mån 9/3

19:50-18:35

1 stop15h 45m

£533

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

mån 13/4

15:25-11:35

1 stop28h 10m

Seattle/Tacoma Intl

lör 9/5

20:20-17:15

1 stop12h 55m

£534

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

lör 7/3

06:35-16:55

1 stop18h 20m

Seattle/Tacoma Intl

mån 9/3

13:37-14:15

2 stops17h 38m

£535

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

lör 7/3

06:35-23:04

2 stops24h 29m

Seattle/Tacoma Intl

mån 9/3

07:15-10:40

2 stops20h 25m

£537

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

ons 28/1

06:30-09:15

3 stops34h 45m

Seattle/Tacoma Intl

tors 29/1

14:35-21:05

3 stops22h 30m

£666

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

ons 28/1

06:30-22:16

2 stops23h 46m

Seattle/Tacoma Intl

tors 29/1

14:35-21:05

3 stops22h 30m

£732

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

See travel insights to Seattle from

How to get the cheapest flight ticket from Northern Ireland to Seattle

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 airline that flies from Northern Ireland to Seattle/Tacoma Intl?

American Airlines is the most popular carrier operating from Northern Ireland to Seattle/Tacoma Intl

Cheap Northern Ireland to Seattle flight deals and tips

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

Fastest flight time

15h 40m

Direct flights

None
The fastest flight from Northern Ireland to Seattle takes 15h 40m
There are no direct flights from Northern Ireland to Seattle. There are no popular flight routes from Northern Ireland to Seattle.
Search flight deals

  • When did momondo last update prices for flights from Northern Ireland to Seattle/Tacoma Intl Airport?

    Prices for flights from Northern Ireland to Seattle/Tacoma Intl Airport refresh daily.

  • How many operators does momondo search for flights from Northern Ireland to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Northern Ireland to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Northern Ireland to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Northern Ireland to Seattle

Compare and see reviews for airlines that fly from Northern Ireland to Seattle with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £436Free CancellationRating
6.7
7,657 reviews
Search British Airways flights
American AirlinesPriceFrom £557Free CancellationRating
7.2
11,095 reviews
Search American Airlines flights

Travelling to a place near Seattle?

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Fife
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Tukwila

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Northern Ireland to Seattle. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Seattle from Northern Ireland which offer a flexible booking policy as well as other useful filters and features.

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

momondo helps you find the best flight between Northern Ireland and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Price alerts on flights to Seattle from Northern Ireland 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.

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