How does KAYAK find such low prices on flights from Northern Ireland to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Northern Ireland to Seattle. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Northern Ireland to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Northern Ireland is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Northern Ireland to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Seattle with an airline and back to Northern Ireland with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Northern Ireland to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Northern Ireland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

£348 CHEAP FLIGHTS from Northern Ireland to Seattle

SEA

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Cheap Flights from Northern Ireland to Seattle

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent return flight deals from Northern Ireland to Seattle

Tue, 26 May - Tue, 2 Jun

23:30 - 09:40

BFS

SEA

42h 10m

3 stops

15:40 - 23:20

SEA

BFS

23h 40m

3 stops

£691Multiple Airlines

Mon, 14 Sep - Sun, 20 Sep

08:45 - 20:40

BHD

SEA

19h 55m

2 stops

19:00 - 20:30

SEA

BHD

17h 30m

2 stops

£700Multiple Airlines

Mon, 14 Sep - Sun, 20 Sep

08:15 - 20:40

BFS

SEA

20h 25m

2 stops

15:40 - 20:15

SEA

BFS

20h 35m

2 stops

£701Multiple Airlines

Mon, 14 Sep - Sun, 20 Sep

19:35 - 17:29

BHD

SEA

29h 54m

2 stops

20:20 - 18:45

SEA

BHD

14h 25m

1 stop

£729British Airways

Mon, 14 Sep - Sun, 20 Sep

19:35 - 11:35

BHD

SEA

24h 00m

1 stop

20:20 - 18:45

SEA

BHD

14h 25m

1 stop

£730British Airways

Mon, 14 Sep - Sun, 20 Sep

08:15 - 20:40

BFS

SEA

20h 25m

2 stops

15:40 - 22:35

SEA

BFS

22h 55m

3 stops

£731Multiple Airlines

Tue, 26 May - Tue, 2 Jun

08:20 - 20:40

BFS

SEA

20h 20m

2 stops

15:40 - 20:55

SEA

BFS

21h 15m

2 stops

£744Multiple Airlines

Wed, 13 May - Wed, 20 May

11:35 - 00:36

BHD

SEA

21h 01m

2 stops

13:30 - 12:00

SEA

BHD

14h 30m

1 stop

£754British Airways

Wed, 13 May - Wed, 20 May

11:35 - 18:25

BHD

SEA

14h 50m

1 stop

13:30 - 12:00

SEA

BHD

14h 30m

1 stop

£773British Airways

Mon, 14 Sep - Sun, 20 Sep

20:55 - 18:32

BFS

SEA

29h 37m

3 stops

15:40 - 22:35

SEA

BFS

22h 55m

3 stops

£773Multiple Airlines

Useful Info

Low season	January
High season	August
Cheapest flight	£348

Best time to beat the crowds (13% less expensive on average)

Most popular time to fly (12% more expensive on average)

Flight from Belfast Intl Airport to Seattle

How does KAYAK find such low prices on flights from Northern Ireland to Seattle?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Northern Ireland to Seattle.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Northern Ireland to Seattle?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Northern Ireland is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Northern Ireland to Seattle?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Seattle with an airline and back to Northern Ireland with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Northern Ireland to Seattle?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Northern Ireland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

SeaTac

Bothell

Kent

Olympia

Kirkland

Ashford

Federal Way

Issaquah

Marysville

Mukilteo

Lynnwood

Tukwila

Lacey

Renton

Ellensburg

Gig Harbor

Aberdeen

Cle Elum

Bainbridge Island

Redmond

Everything you need to know for your flight to Seattle

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Seattle (SEA)

SEA

£348 Find Cheap Flights from Northern Ireland to Seattle

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

Cheap Flights from Northern Ireland to Seattle

Recent return flight deals from Northern Ireland to Seattle

Recent one-way flight deals from Northern Ireland to Seattle

Good to know - Cheap tickets from Northern Ireland to Seattle

FAQs for booking flights from Northern Ireland to Seattle

How does KAYAK find such low prices on flights from Northern Ireland to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Northern Ireland to Seattle.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Northern Ireland to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Northern Ireland is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Northern Ireland to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Seattle with an airline and back to Northern Ireland with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Northern Ireland to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Northern Ireland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Travelling to a place near Seattle?

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Cabin class types available on flights to Northern Ireland

Complete your trip to Seattle with a hotel stay or car hire

Find direct flights for Seattle

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Flights from domestic origins to Seattle

Choose which airport to fly into in Seattle

Find deals for your return flight