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Cheap flights from Belfast City Airport to Seattle from £436

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Belfast City Airport to Seattle departing on 7/3. 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 Belfast City Airport to Seattle

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:20 - 20:40
BHD
-
SEA
18h 20m
2 stops
Multiple Airlines Logo
17:40 - 09:20
SEA
-
BHD
31h 40m
1 stop
£733Multiple Airlines
Tue, 9 Jun - Sat, 20 Jun
KLM Logo
17:30 - 11:15
BHD
-
SEA
25h 45m
2 stops
KLM Logo
09:30 - 09:20
SEA
-
BHD
15h 50m
2 stops
£770KLM
Tue, 7 Jul - Fri, 17 Jul
British Airways Logo
09:40 - 22:58
BHD
-
SEA
21h 18m
2 stops
British Airways Logo
13:35 - 18:10
SEA
-
BHD
20h 35m
1 stop
£778British Airways
Tue, 7 Jul - Fri, 17 Jul
Multiple Airlines Logo
09:50 - 11:37
BHD
-
SEA
33h 47m
1 stop
Multiple Airlines Logo
17:40 - 09:20
SEA
-
BHD
31h 40m
1 stop
£806Multiple Airlines
Tue, 9 Jun - Sat, 20 Jun
Multiple Airlines Logo
17:30 - 11:33
BHD
-
SEA
26h 03m
1 stop
Multiple Airlines Logo
17:40 - 09:20
SEA
-
BHD
31h 40m
1 stop
£843Multiple Airlines
Tue, 7 Jul - Fri, 17 Jul
Aer Lingus Logo
19:30 - 17:10
BHD
-
SEA
29h 40m
2 stops
Aer Lingus Logo
19:10 - 20:55
SEA
-
BHD
17h 45m
2 stops
£895Aer Lingus
Tue, 9 Jun - Sat, 20 Jun

British Airways flights from Belfast City Airport to Seattle

Our best British Airways deals on Belfast City Airport to Seattle flight tickets
British Airways
7 Jul
BHD09:40Belfast City
21h 18m
2 stops
SEA22:58Seattle/Tacoma Intl
17 Jul
SEA13:35Seattle/Tacoma Intl
20h 35m
1 stop
BHD18:10Belfast City
£778
British Airways
7 Mar
BHD06:35Belfast City
12h 55m
1 stop
SEA11:30Seattle/Tacoma Intl
9 Mar
SEA19:50Seattle/Tacoma Intl
15h 45m
1 stop
BHD18:35Belfast City
£828
British Airways
7 Mar
BHD06:35Belfast City
12h 55m
1 stop
SEA11:30Seattle/Tacoma Intl
9 Mar
SEA13:37Seattle/Tacoma Intl
17h 38m
2 stops
BHD14:15Belfast City
£829

momondo Fare Finder

 
Customise your flight search to find flights from Belfast City Airport 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 26 February 2026.
Use the filters below to find and compare flights from Belfast City Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/6

10:20-20:40

2 stops18h 20m

Seattle/Tacoma Intl

Sat 20/6

17:40-09:20

1 stop31h 40m

£733

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 7/7

17:30-11:15

2 stops25h 45m

Seattle/Tacoma Intl

Fri 17/7

09:30-09:20

2 stops15h 50m

£770

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 7/7

09:40-22:58

2 stops21h 18m

Seattle/Tacoma Intl

Fri 17/7

13:35-18:10

1 stop20h 35m

£778

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/6

09:50-11:37

1 stop33h 47m

Seattle/Tacoma Intl

Sat 20/6

17:40-09:20

1 stop31h 40m

£806

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 7/7

17:30-11:33

1 stop26h 03m

Seattle/Tacoma Intl

Fri 17/7

17:40-09:20

1 stop31h 40m

£843

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/6

19:30-17:10

2 stops29h 40m

Seattle/Tacoma Intl

Sat 20/6

19:10-20:55

2 stops17h 45m

£895

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

12:40-17:00

3 stops36h 20m

£436

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

14:15-17:00

2 stops34h 45m

£547

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

19:35-20:31

2 stops32h 56m

£776

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

19:35-20:31

2 stops32h 56m

£778

Flights are sorted by cheapest return flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

See travel insights to Seattle from

How to get the cheapest flight ticket from Belfast City Airport 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 Belfast City to Seattle/Tacoma Intl?

British Airways is the most popular carrier operating from Belfast City to Seattle/Tacoma Intl

When to book flights from Belfast City Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Belfast City Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Belfast City Airport to Seattle (BHD to SEA) flight deals and tips

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

Fastest flight time

12h 45m

Direct flights

None
The fastest flight from Belfast City Airport to Seattle takes 12h 45m
There are no direct flights from Belfast City Airport to Seattle. There are no popular flight routes from Belfast City Airport to Seattle.
Search flight deals

  • How far is Belfast City to Seattle/Tacoma Intl by plane?

    The distance between Belfast City and Seattle/Tacoma Intl is about 4463.4 mi. By plane, this route typically takes 12h 45m.

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

    Prices for flights from Belfast City Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Belfast City Airport 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.

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Fife
SeaTac
Tukwila

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Belfast to Seattle . Millions of users trust and use momondo every year so you are in good hands.

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?

Of course. momondo tracks the price of Belfast to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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