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Cheap flights from Belfast City Airport to Seattle from £397

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 9/6. 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
1 adult, Economy, 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.
British Airways Logo
06:30 - 11:35
BHD
-
SEA
13h 05m
1 stop
British Airways Logo
13:24 - 15:30
SEA
-
BHD
18h 06m
2 stops
£3,908British Airways
Mon, 31 Aug - Thu, 10 Sep
British Airways Logo
09:40 - 20:17
BHD
-
SEA
18h 37m
2 stops
British Airways Logo
13:24 - 15:30
SEA
-
BHD
18h 06m
2 stops
£3,913British Airways
Mon, 31 Aug - Thu, 10 Sep
British Airways Logo
11:35 - 18:25
BHD
-
SEA
14h 50m
1 stop
British Airways Logo
20:20 - 18:45
SEA
-
BHD
14h 25m
1 stop
£4,098British Airways
Mon, 31 Aug - Thu, 10 Sep

British Airways flights from Belfast City Airport to Seattle

Our best British Airways deals on Belfast City Airport to Seattle flight tickets
British Airways
31 Aug
BHD06:30Belfast City
13h 05m
1 stop
SEA11:35Seattle/Tacoma Intl
10 Sept
SEA13:24Seattle/Tacoma Intl
18h 06m
2 stops
BHD15:30Belfast City
£3,908
British Airways
31 Aug
BHD09:40Belfast City
18h 37m
2 stops
SEA20:17Seattle/Tacoma Intl
10 Sept
SEA13:24Seattle/Tacoma Intl
18h 06m
2 stops
BHD15:30Belfast City
£3,913
British Airways
31 Aug
BHD11:35Belfast City
14h 50m
1 stop
SEA18:25Seattle/Tacoma Intl
10 Sept
SEA20:20Seattle/Tacoma Intl
14h 25m
1 stop
BHD18:45Belfast City
£4,098

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 12 April 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

Cheapest return flight

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 31/8

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Thu 10/9

13:24-15:30

2 stops18h 06m

£3,908

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 31/8

09:40-20:17

2 stops18h 37m

Seattle/Tacoma Intl

Thu 10/9

13:24-15:30

2 stops18h 06m

£3,913
Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 31/8

11:35-18:25

1 stop14h 50m

Seattle/Tacoma Intl

Thu 10/9

20:20-18:45

1 stop14h 25m

£4,098
Cheapest one-way

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/6

10:20-14:18

3 stops35h 58m

£397

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/6

10:20-11:45

2 stops33h 25m

£466
Fastest single journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/6

06:30-11:35

1 stop13h 05m

£546

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

06:30-11:35

1 stop13h 05m

£812

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

09:40-11:35

1 stop33h 55m

£813

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

06:30-11:35

1 stop13h 05m

£814

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

09:40-20:37

2 stops18h 57m

£819

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 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

13h 05m

Direct flights

None
The fastest flight from Belfast City Airport to Seattle takes 13h 05m
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

Frequently asked questions about flying from Belfast City Airport to Seattle

  • 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 13h 05m.

  • 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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