How do I get Price Alerts for flights from Belfast to Seattle?

Confirm your travel details to search for the latest offers for flights from Belfast to Seattle . While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

How can I save money on flights from Belfast to Seattle with momondo?

Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore” . Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

How does momondo find its flight prices?

We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

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

Prices for flights from Belfast to Seattle/Tacoma Intl Airport are updated daily.

How old do you have to be to fly from Belfast to Seattle/Tacoma Intl Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Belfast to Seattle/Tacoma Intl Airport.

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

The required travel and health documents for your Seattle/Tacoma Intl Airport 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 Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$721 Cheap Flights from Belfast to Seattle in 2025

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0 bags

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Find the cheapest flights from Belfast to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

1:50 pm - 6:20 pmBHD-SEA

12h 30m1 stop

1:30 pm - 1:30 pmSEA-BHD

16h 00m1 stop

$731British Airways

Find Deal

Mon, Sep 15 - Wed, Sep 24

6:40 am - 11:35 amBHD-SEA

12h 55m1 stop

1:30 pm - 1:30 pmSEA-BHD

16h 00m1 stop

$734British Airways

Find Deal

Mon, Sep 15 - Wed, Sep 24

6:30 pm - 8:09 pmBHD-SEA

33h 39m2 stops

1:02 pm - 1:30 pmSEA-BHD

16h 28m2 stops

$773

Find Deal

Mon, Sep 15 - Wed, Sep 24

5:25 pm - 11:50 amBHD-SEA

26h 25m1 stop

5:40 pm - 4:55 pmSEA-BHD

15h 15m1 stop

$796KLM

Find Deal

Tue, Oct 14 - Thu, Oct 23

6:35 am - 8:40 pmBFS-SEA

22h 05m2 stops

7:00 pm - 11:10 pmSEA-BFS

20h 10m2 stops

$803

Find Deal

Thu, Sep 4 - Wed, Sep 10

12:40 pm - 6:20 pmBHD-SEA

13h 40m1 stop

3:00 pm - 3:35 pmSEA-BHD

16h 35m2 stops

$807American Airlines

Find Deal

Thu, Sep 4 - Wed, Sep 10

6:30 am - 4:10 pmBHD-SEA

17h 40m2 stops

1:35 pm - 4:55 pmSEA-BHD

19h 20m2 stops

$809Delta

Find Deal

Tue, Oct 14 - Thu, Oct 23

9:35 am - 8:09 pmBHD-SEA

18h 34m2 stops

3:00 pm - 3:35 pmSEA-BHD

16h 35m2 stops

$813American Airlines

Find Deal

Thu, Sep 4 - Wed, Sep 10

6:40 am - 11:45 amBHD-SEA

13h 05m1 stop

5:40 pm - 4:55 pmSEA-BHD

15h 15m1 stop

$867KLM

Find Deal

Thu, Sep 4 - Wed, Sep 10

6:30 am - 2:45 pmBHD-SEA

16h 15m2 stops

11:23 am - 4:55 pmSEA-BHD

21h 32m2 stops

$1,096Delta

Find Deal

Sat, Aug 16 - Sun, Aug 24

Finnair flights from Belfast to Seattle

Our best Finnair deals on Belfast to Seattle flight tickets

Finnair

Aug 16

BHD4:15 pmBelfast City

27h 15m

1 stop

SEA11:30 amSeattle/Tacoma Intl

Aug 24

SEA1:30 pmSeattle/Tacoma Intl

14h 00m

1 stop

BHD11:30 amBelfast City

$1,001

Find similar

Finnair

Aug 16

BHD7:05 amBelfast City

35h 20m

2 stops

SEA10:25 amSeattle/Tacoma Intl

Aug 24

SEA1:30 pmSeattle/Tacoma Intl

14h 00m

1 stop

BHD11:30 amBelfast City

$1,057

Find similar

Finnair

Aug 16

BHD4:15 pmBelfast City

27h 15m

1 stop

SEA11:30 amSeattle/Tacoma Intl

Aug 23

SEA12:46 amSeattle/Tacoma Intl

29h 54m

2 stops

BHD2:40 pmBelfast City

$1,164

Find similar

Delta flights from Belfast to Seattle

Our best Delta deals on Belfast to Seattle flight tickets

Delta

Oct 14

BHD6:30 amBelfast City

17h 40m

2 stops

SEA4:10 pmSeattle/Tacoma Intl

Oct 23

SEA1:35 pmSeattle/Tacoma Intl

19h 20m

2 stops

BHD4:55 pmBelfast City

$809

Find similar

Delta

Aug 16

BHD6:30 amBelfast City

16h 15m

2 stops

SEA2:45 pmSeattle/Tacoma Intl

Aug 24

SEA11:23 amSeattle/Tacoma Intl

21h 32m

2 stops

BHD4:55 pmBelfast City

$1,096

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 9/15

1:50 pm-6:20 pm

1 stop12h 30m

Seattle/Tacoma Intl

Wed 9/24

1:30 pm-1:30 pm

1 stop16h 00m

$731

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 9/15

6:40 am-11:35 am

1 stop12h 55m

Seattle/Tacoma Intl

Wed 9/24

1:30 pm-1:30 pm

1 stop16h 00m

$734

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 9/15

6:30 pm-8:09 pm

2 stops33h 39m

Seattle/Tacoma Intl

Wed 9/24

1:02 pm-1:30 pm

2 stops16h 28m

$773

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 10/14

5:25 pm-11:50 am

1 stop26h 25m

Seattle/Tacoma Intl

Thu 10/23

5:40 pm-4:55 pm

1 stop15h 15m

$796

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 9/4

6:35 am-8:40 pm

2 stops22h 05m

Seattle/Tacoma Intl

Wed 9/10

7:00 pm-11:10 pm

2 stops20h 10m

$803

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/4

12:40 pm-6:20 pm

1 stop13h 40m

Seattle/Tacoma Intl

Wed 9/10

3:00 pm-3:35 pm

2 stops16h 35m

$807

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 10/14

6:30 am-4:10 pm

2 stops17h 40m

Seattle/Tacoma Intl

Thu 10/23

1:35 pm-4:55 pm

2 stops19h 20m

$809

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/4

9:35 am-8:09 pm

2 stops18h 34m

Seattle/Tacoma Intl

Wed 9/10

3:00 pm-3:35 pm

2 stops16h 35m

$813

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 9/4

6:40 am-11:45 am

1 stop13h 05m

Seattle/Tacoma Intl

Wed 9/10

5:40 pm-4:55 pm

1 stop15h 15m

$867

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 8/16

6:30 am-2:45 pm

2 stops16h 15m

Seattle/Tacoma Intl

Sun 8/24

11:23 am-4:55 pm

2 stops21h 32m

$1,096

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Cheap Belfast to Seattle flight deals and tips

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

Best Price Found	$731
Fastest flight time	12h 30m
Direct flights	None
Airports in Seattle	1 airport

The best flight deal from Belfast to Seattle found on momondo in the last 72 hours is $731

The fastest flight from Belfast to Seattle takes 12h 30m

There are no direct flights from Belfast to Seattle. Popular non-direct routes for this connection are Belfast City Airport - Seattle/Tacoma Intl Airport and Belfast Intl Airport - Seattle/Tacoma Intl Airport.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

Search flight deals

How far is Belfast to Seattle/Tacoma Intl by plane?
The straight-line distance from Belfast to Seattle/Tacoma Intl is 4463.0 mi. A reasonable flight in good conditions will take 12h 30m.
When did momondo last update prices for flights from Belfast to Seattle/Tacoma Intl Airport?
Prices for flights from Belfast to Seattle/Tacoma Intl Airport are updated daily.
How old do you have to be to fly from Belfast to Seattle/Tacoma Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Belfast to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The required travel and health documents for your Seattle/Tacoma Intl Airport 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 Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

How do I get Price Alerts for flights from Belfast to Seattle?
Confirm your travel details to search for the latest offers for flights from Belfast to Seattle. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.
How can I save money on flights from Belfast to Seattle with momondo?
Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.
How does momondo find its flight prices?
We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Leavenworth

Tacoma

SeaTac

Ocean Shores

Olympia

Renton

Kent

Federal Way

Puyallup

Lynnwood

Marysville

Tukwila

Kirkland

Lakewood

Fife

Centralia

Cle Elum

Shoreline

Westport

Redmond

Why use momondo?

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

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

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

All flight searches from Belfast to Seattle on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Belfast to Seattle?

Once all potential Belfast to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are not ready to book a flight from Belfast to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.