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Cheap flights from Seattle to Northern Ireland from £238

SEA — BFS
18 Oct — 25 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Northern Ireland

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Northern Ireland

Mon 5/1007:15 -
2 stops18h 05m
Thu 22/1017:30 -
1 stop26h 22m
Deal found 14/9£617
Fri 16/1017:45 -
1 stop15h 10m
Fri 23/1009:50 -
1 stop14h 45m
Deal found 16/9£651
Sat 12/1214:35 -
2 stops23h 00m
Wed 16/1208:30 -
2 stops16h 30m
Deal found 14/9£654
Sat 12/1214:35 -
2 stops16h 40m
Wed 16/1207:25 -
2 stops17h 35m
Deal found 14/9£666
Mon 5/1013:30 -
1 stop15h 25m
Thu 22/1012:45 -
1 stop13h 40m
Deal found 18/9£678
Sun 20/915:55 -
2 stops32h 10m
Wed 23/920:15 -
1 stop30h 45m
Deal found 15/9£682
Mon 5/1015:14 -
2 stops16h 16m
Thu 22/1006:30 -
1 stop13h 05m
Deal found 18/9£689
Mon 28/915:40 -
2 stops31h 25m
Mon 12/1018:50 -
1 stop32h 10m
Deal found 18/9£693
Mon 5/1015:14 -
2 stops16h 16m
Thu 22/1012:45 -
2 stops19h 51m
Deal found 16/9£697
Sun 18/1010:30 -
2 stops23h 55m
Sat 24/1011:10 -
1 stop15h 50m
Deal found 15/9£709
Thu 15/1019:00 -
2 stops17h 35m
Wed 28/1021:10 -
3 stops26h 45m
Deal found 16/9£755
Thu 29/1015:35 -
2 stops20h 35m
Thu 5/1117:40 -
3 stops31h 20m
Deal found 14/9£779

Find flight deals from Seattle to Northern Ireland

Round-trip from

£612

One-way from

£238
KLM
  • KLM
  • 28/9-12/10
  • 2 total stops
  • 45h 27m total
  • Seattle to Northern Ireland
Search Deals
24/10-31/12
  • 24/10-31/12
  • 3 total stops
  • 53h 45m total
  • Seattle to Northern Ireland
Search Deals

Cheapflights Fare Finder

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

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Route

Depart

Return

Price

Cheapest return flight

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sat 24/10

19:10-07:55

3 stops53h 45m

Belfast Intl

Wed 31/12

00:00-15:00

Nonstop0h 00m

£238

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sat 24/10

19:10-09:50

3 stops55h 40m

Belfast City

Wed 31/12

00:00-15:00

Nonstop0h 00m

£260
Fastest return journey

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sat 24/10

19:45-15:15

1 stop12h 30m

Belfast City

Wed 31/12

00:00-15:00

Nonstop0h 00m

£364

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 5/10

07:15-09:20

2 stops18h 05m

Belfast City

Thu 22/10

17:30-11:52

1 stop26h 22m

£617

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Fri 16/10

17:45-16:55

1 stop15h 10m

Belfast City

Fri 23/10

09:50-16:35

1 stop14h 45m

£651

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Sat 12/12

14:35-21:35

2 stops23h 00m

Belfast Intl

Wed 16/12

08:30-17:00

2 stops16h 30m

£654

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 5/10

13:30-12:55

1 stop15h 25m

Belfast City

Thu 22/10

12:45-18:25

1 stop13h 40m

£678

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 17/1

18:45-16:50

1 stop14h 05m

Belfast City

Thu 21/1

11:05-16:50

1 stop13h 45m

£686

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 5/10

15:14-15:30

2 stops16h 16m

Belfast City

Thu 22/10

06:30-11:35

1 stop13h 05m

£690

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Mon 28/9

15:40-07:05

2 stops31h 25m

Belfast Intl

Mon 12/10

18:50-19:00

1 stop32h 10m

£693

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 16 resultsSorted by cheapest first
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Best time to book a flight from Seattle to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Seattle with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from Seattle to Northern Ireland

No data available for this route at this time. Please check back soon.

Related info for your journey

  • What airport do you fly from for flights from Seattle to Northern Ireland?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to Northern Ireland from Seattle.

  • How long is the flight from Seattle to Northern Ireland?

    KLM and British Airways can get you from Seattle to Northern Ireland in just under 15h 25m. Your travel time can differ by up to 2h 40m. There are 4472 mi between Seattle and Northern Ireland. This flight may include one or multiple stops.

  • Can I find deals for flights from Seattle to Northern Ireland that include hotel bookings?

    Yes. In addition to deals on Seattle to Northern Ireland flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Northern Ireland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Northern Ireland.

  • Can I find deals for business class flights from Seattle to Northern Ireland?

    Yes. Cheapflights offers flight deals from Seattle to Northern Ireland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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How does Cheapflights help users find flights from Seattle to Northern Ireland?

Deals for Seattle to Northern Ireland flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Northern Ireland?

Cheapflights simply makes it quick and affordable to book flights from Seattle to Northern Ireland by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Seattle to Northern Ireland with no change fees?

Yes! Cheapflights helps users easily find flights from Seattle to Northern Ireland with no change fees.

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Not ready to book yet? You can track prices for flights from Seattle to Northern Ireland on Cheapflights with our Price Alert feature and get notified when better prices are available.

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