What is the cheapest flight from Seattle to Belfast?

In the last 3 days, the lowest price for a flight from Seattle to Belfast was $264 for a one-way ticket and $774 for a round-trip. Visit our flight page for the latest deals!>/a>

Do I need a passport to fly between Seattle and Belfast?

Yes, you’ll need a passport to travel to Belfast from Seattle. Visit our flight page for the latest deals!>/a>

Which airports will I be using when flying from Seattle to Belfast?

Seattle is served by only 1 airport and there are 2 airports in Belfast. You will leave Seattle from Seattle/Tacoma Intl and you will be arriving in Belfast at one of these airports: Belfast Intl or Belfast City. Visit our flight page for the latest deals!>/a>

Which aircraft models fly most regularly from Seattle to Belfast?

We unfortunately don’t have that data for this specific route.

How does KAYAK find such low prices on flights from Seattle to Belfast?

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 Seattle to Belfast. 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 Seattle to Belfast?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast from Seattle 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 Seattle to Belfast?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Belfast with an airline and back to Seattle 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 Seattle to Belfast?

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 Belfast from Seattle 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>

$264 CHEAP FLIGHTS from Seattle to Belfast (SEA - BF1)

KAYAK searches hundreds of travel sites at once for deals on flights to Belfast

...and more

Travelers love KAYAK

41,299,237 searches in the past 7 days on KAYAK

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Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$774

Multiple Airlines

Thu 5/7Sat 5/16

SEA - BFS • 3 stops

Cheapest one-way

$264

Multiple Airlines

Thu 4/16

SEA - BFS • 3 stops

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Belfast!

Flight Deals

Cheap Flights from Seattle to Belfast (SEA-BHD)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Seattle to Belfast

Thu, May 7 - Sat, May 16

7:00 pm - 9:30 pm

SEA

BFS

18h 30m

3 stops

8:15 pm - 9:40 am

BFS

SEA

45h 25m

3 stops

$774Multiple Airlines

Thu, May 7 - Sat, May 16

7:00 pm - 6:55 pm

SEA

BFS

15h 55m

2 stops

8:15 pm - 9:40 am

BFS

SEA

45h 25m

3 stops

$836Multiple Airlines

Tue, Sep 1 - Tue, Sep 22

8:20 pm - 6:55 pm

SEA

BHD

14h 35m

1 stop

9:40 am - 6:25 pm

BHD

SEA

16h 45m

1 stop

$839British Airways

Wed, Sep 2 - Wed, Sep 9

8:20 pm - 8:35 pm

SEA

BHD

16h 15m

1 stop

7:40 pm - 11:35 am

BHD

SEA

23h 55m

1 stop

$840British Airways

Mon, Sep 14 - Mon, Sep 21

8:20 pm - 5:30 pm

SEA

BHD

13h 10m

1 stop

7:35 pm - 11:35 am

BHD

SEA

24h 00m

1 stop

$868British Airways

Thu, Apr 16 - Sun, May 3

3:40 pm - 9:40 pm

SEA

BFS

22h 00m

3 stops

10:00 pm - 9:40 am

BFS

SEA

43h 40m

3 stops

$871Multiple Airlines

Mon, Sep 14 - Mon, Sep 21

6:24 am - 12:55 pm

SEA

BHD

22h 31m

2 stops

7:35 pm - 11:35 am

BHD

SEA

24h 00m

1 stop

$875British Airways

Wed, Sep 2 - Wed, Sep 9

8:20 pm - 8:35 pm

SEA

BHD

16h 15m

1 stop

7:40 pm - 6:49 pm

BHD

SEA

31h 09m

2 stops

$882British Airways

Wed, Sep 2 - Sun, Sep 6

8:20 pm - 8:35 pm

SEA

BHD

16h 15m

1 stop

6:30 am - 11:35 am

BHD

SEA

13h 05m

1 stop

$886British Airways

Wed, Sep 2 - Wed, Sep 9

1:32 pm - 1:35 pm

SEA

BHD

16h 03m

2 stops

6:30 am - 5:29 pm

BHD

SEA

18h 59m

2 stops

$943American Airlines

Booking Insights

KAYAK's insights & trends for Seattle to Belfast flights

Get data-powered insights and trends into flights from Seattle to Belfast to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Seattle to Belfast?

In the past 3 days, the cheapest round-trip tickets from Seattle to Belfast were found on British Airways ($839) and American Airlines ($943).

Find deals

Cheapest flight	$264

Flight from Seattle to Belfast Intl Airport

When to book flights from Seattle to Belfast

Are your dates flexible? Find out the best times to travel from Seattle to Belfast based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What is the cheapest flight from Seattle to Belfast?
In the last 3 days, the lowest price for a flight from Seattle to Belfast was $264 for a one-way ticket and $774 for a round-trip.
Do I need a passport to fly between Seattle and Belfast?
Yes, you’ll need a passport to travel to Belfast from Seattle.
Which airports will I be using when flying from Seattle to Belfast?
Seattle is served by only 1 airport and there are 2 airports in Belfast. You will leave Seattle from Seattle/Tacoma Intl and you will be arriving in Belfast at one of these airports: Belfast Intl or Belfast City.
Which aircraft models fly most regularly from Seattle to Belfast?
We unfortunately don’t have that data for this specific route.
How does KAYAK find such low prices on flights from Seattle to Belfast?
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 Seattle to Belfast.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Belfast?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast from Seattle 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 Seattle to Belfast?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Belfast with an airline and back to Seattle with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Belfast?
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 Belfast from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Seattle to Belfast

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on your arrival and departure airports

Seattle (SEA)

$264 Find Cheap Flights from Seattle to Belfast

KAYAK searches hundreds of travel sites at once for deals on flights to Belfast

Everything you should know

Cheap Flights from Seattle to Belfast (SEA-BHD)

Recent round-trip flight deals from Seattle to Belfast

Recent one-way flight deals from Seattle to Belfast

Recent last minute flight deals from Seattle to Belfast

KAYAK's insights & trends for Seattle to Belfast flights

Get data-powered insights and trends into flights from Seattle to Belfast to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Seattle to Belfast?

In the past 3 days, the cheapest round-trip tickets from Seattle to Belfast were found on British Airways ($839) and American Airlines ($943).

Good to know

When to book flights from Seattle to Belfast

FAQs for booking flights from Seattle to Belfast

What is the cheapest flight from Seattle to Belfast?

In the last 3 days, the lowest price for a flight from Seattle to Belfast was $264 for a one-way ticket and $774 for a round-trip.

Do I need a passport to fly between Seattle and Belfast?

Yes, you’ll need a passport to travel to Belfast from Seattle.

Which airports will I be using when flying from Seattle to Belfast?

Seattle is served by only 1 airport and there are 2 airports in Belfast. You will leave Seattle from Seattle/Tacoma Intl and you will be arriving in Belfast at one of these airports: Belfast Intl or Belfast City.

Which aircraft models fly most regularly from Seattle to Belfast?

We unfortunately don’t have that data for this specific route.

How does KAYAK find such low prices on flights from Seattle to Belfast?

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 Seattle to Belfast.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Belfast?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast from Seattle 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 Seattle to Belfast?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Belfast with an airline and back to Seattle with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Belfast?

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 Belfast from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Seattle to Belfast

Information on your arrival and departure airports

Cabin class types available on flights from Seattle to Belfast

Complete your trip to Belfast with a hotel stay or car rental

Find direct flights to and from Seattle and Belfast

Flights to other popular destinations

Flights from domestic origins to Belfast

Choose which airport to fly into in Belfast

Find deals for your return flight