How long is the flight from Seattle to Belfast City Airport?

Departing from Seattle to Belfast City Airport will take you 15h 50m. The distance between Seattle and Belfast City Airport is about 4472 mi.

In terms of precipitation, rainfall in Belfast City Airport ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast City Airport when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Belfast City Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

What is the cheapest time of day to fly from SEA to BHD?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Belfast City Airport as you normally would.

What airport do you fly from for flights from Seattle to Belfast City?

Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Belfast City. You should not have trouble finding flights to Belfast City from Seattle/Tacoma Intl; the airport handles an average of 0 outbound flights to Belfast City per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Seattle airport to Belfast City. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

Can I find deals for flights from Seattle to Belfast City that include hotel bookings?

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

How can I find direct flights from Seattle to Belfast City?

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

Can I find deals for business class flights from Seattle to Belfast City?

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

£667+ Cheap Flights from Seattle to Belfast City Airport

Cheap flight deals from Seattle to Belfast City

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

Cheapest flights from Seattle to Belfast City
Explore the most affordable flight options available from Seattle to Belfast City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 October 2026.

Mon 2/1118:45 -

1 stop15h 50m

Mon 9/1119:40 -

1 stop23h 45m

Deal found 5/10£714

Mon 9/1115:51 -

2 stops17h 34m

Tue 17/1110:00 -

1 stop14h 50m

Deal found 7/10£723

Tue 10/1110:43 -

2 stops16h 47m

Tue 17/1110:00 -

1 stop14h 50m

Deal found 7/10£726

Tue 10/1110:43 -

2 stops16h 47m

Tue 17/1110:00 -

2 stops17h 45m

Deal found 7/10£732

Mon 2/1117:50 -

2 stops18h 40m

Mon 9/1107:20 -

2 stops16h 35m

Deal found 5/10£752

Wed 9/1218:45 -

1 stop16h 20m

Fri 18/1219:40 -

1 stop23h 45m

Deal found 7/10£788

Find flight deals from Seattle to Belfast City

Round-trip from	£651

British Airways
9/3-18/3
3 total stops
33h 26m total
Seattle to Belfast

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Belfast City Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 11/1

18:45-18:35

1 stop15h 50m

Belfast City

Thu 14/1

17:50-16:50

1 stop31h 00m

£667

Fastest return journey

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

£667

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Tue 9/3

06:19-11:30

2 stops21h 11m

Belfast City

Thu 18/3

06:30-20:18

2 stops20h 48m

£679

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 2/11

10:43-14:15

2 stops19h 32m

Belfast City

Mon 9/11

19:40-11:25

1 stop23h 45m

£733

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 9/11

10:10-20:30

3 stops26h 20m

Belfast City

Tue 17/11

07:20-09:27

3 stops34h 07m

£756

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Fri 30/10

15:35-17:45

2 stops19h 10m

Belfast City

Fri 13/11

20:05-20:59

3 stops32h 54m

£866

Flights are sorted by cheapest return flights first.

Deals found on 7/10

Sorted by cheapest first

Best time to book a flight from Seattle to Belfast City

Have a flexible travel schedule? Discover the best time to fly to Belfast City from Seattle with our price prediction graph.

SEA-BHD

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

What airport do you fly from for flights from Seattle to Belfast City?
Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Belfast City. You should not have trouble finding flights to Belfast City from Seattle/Tacoma Intl; the airport handles an average of 0 outbound flights to Belfast City per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Seattle airport to Belfast City. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.
How long is the flight from Seattle to Belfast City Airport?
Departing from Seattle to Belfast City Airport will take you 15h 50m. The distance between Seattle and Belfast City Airport is about 4472 mi.
Can I find deals for flights from Seattle to Belfast City that include hotel bookings?
Yes. In addition to deals on Seattle to Belfast City flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Seattle to Belfast City?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Belfast City.
Can I find deals for business class flights from Seattle to Belfast City?
Yes. Cheapflights offers flight deals from Seattle to Belfast City 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

Bangor

Carrickfergus

Newcastle

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Belfast City flight routes

Complete your trip

Direct flights to Northern Ireland

Flights by cabin class

Other flight options

Other flights from Seattle

Popular flights

Alternative routes for Seattle to Belfast City

Portland to Belfast Intl flights

Portland to Belfast City flights

Fly with Cheapflights

How does Cheapflights help users find flights from Seattle to Belfast City?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Belfast City from Seattle today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Seattle to Belfast City?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Belfast City for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Belfast City with no change fees?

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

Can Cheapflights notify me if prices for flights from Seattle to Belfast City become cheaper?

Yes! Start tracking prices for Seattle to Belfast City flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Seattle to Belfast City Airport from £667

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Seattle to Belfast City

Cheapest flights from Seattle to Belfast CityExplore the most affordable flight options available from Seattle to Belfast City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 October 2026.

Explore the most affordable flight options available from Seattle to Belfast City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 October 2026.

Best flights from Seattle to Belfast CityDiscover carefully curated flight deals from Seattle to Belfast City that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 October 2026.

Discover carefully curated flight deals from Seattle to Belfast City that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 October 2026.

Last-minute flights from Seattle to Belfast CityDiscover last-minute flight deals from Seattle to Belfast City. Data last updated 8 October 2026 and is based on user searches.

Discover last-minute flight deals from Seattle to Belfast City. Data last updated 8 October 2026 and is based on user searches.

Find flight deals from Seattle to Belfast City

Round-trip from

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Belfast City Airport that are best for you.

Best time to book a flight from Seattle to Belfast City

Have a flexible travel schedule? Discover the best time to fly to Belfast City from Seattle with our price prediction graph.

Related info for your journey

What airport do you fly from for flights from Seattle to Belfast City?

How long is the flight from Seattle to Belfast City Airport?

Can I find deals for flights from Seattle to Belfast City that include hotel bookings?

How can I find direct flights from Seattle to Belfast City?

Can I find deals for business class flights from Seattle to Belfast City?

Travelling to a place near Belfast City Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Belfast City

See prices for flight routes from nearby airports that may be better suited for you.

Other flights to Belfast City

Explore flights to Belfast City departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 8 October 2026.

Complete your trip

Complete your trip to Belfast City by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Northern Ireland

Book a non-stop flight to one of these other cities located in Northern Ireland.

Search flights from Seattle to Belfast City by cabin class

Find flights from Seattle to Belfast City, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Seattle and Belfast City flights

Browse other Seattle and Belfast City flight options. Last updated on 8 October 2026.

Other flights from Seattle

Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on 8 October 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Fly with Cheapflights

How does Cheapflights help users find flights from Seattle to Belfast City?

Why should you use Cheapflights to find cheap flight tickets from Seattle to Belfast City?

Can Cheapflights find flights from Seattle to Belfast City with no change fees?

Can Cheapflights notify me if prices for flights from Seattle to Belfast City become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Seattle to Belfast City
Explore the most affordable flight options available from Seattle to Belfast City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 October 2026.

Best flights from Seattle to Belfast City
Discover carefully curated flight deals from Seattle to Belfast City that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 October 2026.

Last-minute flights from Seattle to Belfast City
Discover last-minute flight deals from Seattle to Belfast City. Data last updated 8 October 2026 and is based on user searches.