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>

£475 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

Mon, 20 Apr - Mon, 4 May

06:40 - 20:40

BFS

SEA

22h 00m

2 stops

19:00 - 16:15

SEA

BFS

13h 15m

2 stops

£612Multiple Airlines

Mon, 20 Apr - Mon, 4 May

19:35 - 20:40

BFS

SEA

33h 05m

3 stops

15:40 - 16:15

SEA

BFS

16h 35m

2 stops

£620Multiple Airlines

Mon, 20 Apr - Mon, 4 May

17:30 - 11:45

BHD

SEA

26h 15m

1 stop

08:50 - 09:20

SEA

BHD

16h 30m

2 stops

£647KLM

Mon, 20 Apr - Mon, 4 May

19:35 - 17:55

BFS

SEA

30h 20m

3 stops

15:40 - 23:20

SEA

BFS

23h 40m

3 stops

£647Multiple Airlines

Mon, 20 Apr - Mon, 4 May

19:35 - 11:35

BHD

SEA

24h 00m

1 stop

13:35 - 19:25

SEA

BHD

21h 50m

1 stop

£650Multiple Airlines

Mon, 20 Apr - Mon, 4 May

11:35 - 00:30

BHD

SEA

20h 55m

2 stops

15:17 - 15:30

SEA

BHD

16h 13m

2 stops

£667British Airways

Sat, 7 Mar - Tue, 10 Mar

06:35 - 11:30

BHD

SEA

12h 55m

1 stop

07:21 - 11:30

SEA

BHD

21h 09m

2 stops

£679British Airways

Sat, 7 Mar - Tue, 10 Mar

06:35 - 11:30

BHD

SEA

12h 55m

1 stop

07:21 - 10:30

SEA

BHD

20h 09m

2 stops

£683British Airways

Sat, 7 Mar - Tue, 10 Mar

09:15 - 23:04

BHD

SEA

21h 49m

2 stops

07:21 - 10:30

SEA

BHD

20h 09m

2 stops

£684British Airways

Sat, 7 Mar - Tue, 10 Mar

06:35 - 23:04

BHD

SEA

24h 29m

2 stops

07:21 - 11:30

SEA

BHD

21h 09m

2 stops

£687British Airways

Useful Info

Low season	January
High season	August
Cheapest flight	£475

Best time to beat the crowds (12% less expensive on average)

Most popular time to fly (14% 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

Kirkland

Ashford

Olympia

Federal Way

Issaquah

Marysville

Lynnwood

Mukilteo

Lacey

Renton

Redmond

Ellensburg

Tukwila

Gig Harbor

Aberdeen

Bainbridge Island

Puyallup

Everything you need to know for your flight to Seattle

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Information on the airport you'll fly into in Seattle

Seattle (SEA)

SEA

£475 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

Flights to other popular destinations

Flights from domestic origins to Seattle

Choose which airport to fly into in Seattle

Find deals for your return flight