Which airports can I use when flying from Belfast to Seattle?

Flights from Belfast to Seattle may depart from several airports in Belfast area, including Belfast Intl (BFS) and Belfast City (BHD). Flights usually arrive at Seattle/Tacoma Intl (SEA).

What cabin classes can I book on flights from Belfast to Seattle?

Only Business Class is available on flights from Belfast to Seattle.

Which airports do connecting flights from Belfast to Seattle pass through?

Most connecting flights from Belfast to Seattle pass through London Heathrow (LHR), which handles 100% of one-stop traffic on this route.

Can I save money by using flexible dates for flights from Belfast to Seattle?

Yes. Flexible dates can save you up to 26% on flights from Belfast to Seattle. Thursday is the cheapest departure day at $895 round-trip on average, while Tuesday is the most expensive at $1,201, a difference of $306. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Seattle?

Some of the most popular sights in Seattle are Pike Place Market, Lumen Field and Space Needle. These are among the most viewed places in Seattle on KAYAK.

How long is a flight from Belfast to Seattle?

A nonstop flight from Belfast to Seattle takes 00m, covering 4,471 miles.

Do I need a passport to fly from Belfast to Seattle?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

How are flight prices from Belfast to Seattle looking right now?

One-way fares from Belfast to Seattle are currently higher than usual. Average one-way flight prices are about $640, which is 12% above the typical average for this route.

What is the time difference between Belfast and Seattle?

Seattle is 8 hours behind Belfast (Pacific Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Seattle/Tacoma Intl Airport (SEA)?

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates averaging $61 for economy cars. Top options include: • Europcar • Fox • Thrifty • Budget • Dollar

How much should I expect to pay for a Belfast to Seattle flight?

Round-trip flights from Belfast to Seattle range from $953 to $982, with an average of $977 over the past 12 months. Anything below $953 counts as a good deal.

How much is a round-trip flight from Belfast to Seattle?

Round-trip flights from Belfast to Seattle typically range from $953 to $982. The lowest price found in the past 5 days was $934, on British Airways.

Which airline is the cheapest to fly from Belfast to Seattle?

British Airways ($934) and KLM ($1,017) are the cheapest airlines to fly round-trip from Belfast to Seattle according to KAYAK data over the last 5 days.

What is the cheapest layover airport when flying from Belfast to Seattle?

Flights via London Heathrow (LHR) offer the most affordable fares, with an average round-trip price of $939. Based on KAYAK data over the past 3 months.

When flying from Belfast to Seattle which airport offers the shortest layover?

London Heathrow (LHR) had the shortest average connection time for Belfast to Seattle layovers at 8h 39m over the past 3 months.

$534 CHEAP FLIGHTS from Belfast to Seattle (BF1 - SEA)

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Cheapest round-trip

$934

Typical prices: $953-$982

British Airways

Sun 12/2Sun 12/9

BHD - SEA • 1 stop

Cheapest one-way

$534

Typical prices: $568-$603

Multiple Airlines

Mon 3/26

BHD - SEA • 3 stops

Nonstop flights

Not available

There are currently no direct flights between Belfast and Seattle. You'll need to take a connecting flight to reach the destination.

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Flight Deals

Cheap Flights from Belfast to Seattle

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

Round-trip

One-way

Recent round-trip flight deals from Belfast to Seattle

Wed, Dec 2 - Wed, Dec 9

9:15 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

15h 35m1 stop London Heathrow

6:45 pm - 7:05 pmSEA Seattle/Tacoma Intl-BHD Belfast City

16h 20m1 stop London Heathrow

$934British Airways

Wed, Dec 2 - Wed, Dec 9

11:40 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

13h 10m1 stop London Heathrow

9:15 am - 10:05 amSEA Seattle/Tacoma Intl-BHD Belfast City

16h 50m2 stops Philadelphia London Heathrow

$949British Airways

Wed, Dec 2 - Wed, Dec 9

11:40 am - 12:47 amBHD Belfast City-SEA Seattle/Tacoma Intl

21h 07m2 stops London Heathrow Chicago O'Hare Intl

2:07 pm - 4:55 pmSEA Seattle/Tacoma Intl-BHD Belfast City

18h 48m2 stops Dallas/Fort Worth London Heathrow

$956British Airways

Sat, Feb 20 - Mon, Jul 5

6:35 am - 11:25 amBHD Belfast City-SEA Seattle/Tacoma Intl

12h 50m1 stop London Heathrow

1:35 pm - 12:55 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 20m1 stop London Heathrow

$961British Airways

Sat, Feb 20 - Mon, Jul 5

11:45 am - 12:34 amBHD Belfast City-SEA Seattle/Tacoma Intl

20h 49m2 stops London Heathrow Chicago O'Hare Intl

8:20 pm - 5:30 pmSEA Seattle/Tacoma Intl-BHD Belfast City

13h 10m1 stop London Heathrow

$997British Airways

Sat, Feb 20 - Mon, Jul 5

5:20 pm - 4:00 pmBHD Belfast City-SEA Seattle/Tacoma Intl

30h 40m2 stops Amsterdam Schiphol Portland

5:45 pm - 4:55 pmSEA Seattle/Tacoma Intl-BHD Belfast City

15h 10m2 stops Salt Lake City Amsterdam Schiphol

$1,017KLM

Thu, Jan 21 - Sun, Jan 24

2:10 pm - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

34h 40m1 stop London Heathrow

6:45 pm - 4:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

14h 05m1 stop London Heathrow

$1,020Iberia

Sat, Feb 20 - Sat, Feb 20

6:35 am - 11:25 amBHD Belfast City-SEA Seattle/Tacoma Intl

12h 50m1 stop London Heathrow

1:40 pm - 11:10 amSEA Seattle/Tacoma Intl-BHD Belfast City

13h 30m1 stop London Heathrow

$1,021British Airways

Thu, Jan 21 - Sun, Jan 24

5:50 pm - 12:43 amBHD Belfast City-SEA Seattle/Tacoma Intl

38h 53m2 stops London Heathrow Chicago O'Hare Intl

10:17 am - 4:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

22h 33m2 stops Chicago O'Hare Intl London Heathrow

$1,026Iberia

Thu, Jan 21 - Sun, Jan 24

6:30 am - 4:50 pmBHD Belfast City-SEA Seattle/Tacoma Intl

18h 20m1 stop London Heathrow

6:45 pm - 6:50 pmSEA Seattle/Tacoma Intl-BHD Belfast City

16h 05m1 stop London Heathrow

$1,027British Airways

Booking Insights

Price, demand and travel trends for Belfast to Seattle flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Prices

Airlines

Layovers

How much is a round-trip flight from Belfast to Seattle? This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Belfast to Seattle departing in december.

Find deals

Cheapest flight	$534

One-way flight from Belfast City Airport to Seattle

When to book flights from Belfast to Seattle

Are your dates flexible? Find out the best times to travel from Belfast to Seattle 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 cabin classes can I book on flights from Belfast to Seattle?
Only Business Class is available on flights from Belfast to Seattle.
How long is a flight from Belfast to Seattle?
A nonstop flight from Belfast to Seattle takes 00m, covering 4,471 miles.
Do I need a passport to fly from Belfast to Seattle?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
How much should I expect to pay for a Belfast to Seattle flight?
Round-trip flights from Belfast to Seattle range from $953 to $982, with an average of $977 over the past 12 months. Anything below $953 counts as a good deal.
How are flight prices from Belfast to Seattle looking right now?
One-way fares from Belfast to Seattle are currently higher than usual. Average one-way flight prices are about $640, which is 12% above the typical average for this route.
What car rental options are available at Seattle/Tacoma Intl Airport (SEA)?
Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates averaging $61 for economy cars. Top options include:

• Europcar
• Fox
• Thrifty
• Budget
• Dollar
Which airports can I use when flying from Belfast to Seattle?
Flights from Belfast to Seattle may depart from several airports in Belfast area, including Belfast Intl (BFS) and Belfast City (BHD). Flights usually arrive at Seattle/Tacoma Intl (SEA).
Which airports do connecting flights from Belfast to Seattle pass through?
Most connecting flights from Belfast to Seattle pass through London Heathrow (LHR), which handles 100% of one-stop traffic on this route.
Can I save money by using flexible dates for flights from Belfast to Seattle?
Yes. Flexible dates can save you up to 26% on flights from Belfast to Seattle. Thursday is the cheapest departure day at $895 round-trip on average, while Tuesday is the most expensive at $1,201, a difference of $306.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What is the time difference between Belfast and Seattle?
Seattle is 8 hours behind Belfast (Pacific Time vs British Time). Plan for the time shift when scheduling connections or first-day activities.
What popular places can I visit in Seattle?
Some of the most popular sights in Seattle are Pike Place Market, Lumen Field and Space Needle. These are among the most viewed places in Seattle on KAYAK.

If your dates are flexible, aim for a Thursday departure and avoid flying on Tuesday. On this route, Thursday flights average $895, about $306 less than Tuesday fares (25% savings) based on the last 12 months.
If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.

• Coast Gateway Hotel
• Seattle Airport Marriott
• Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport

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$534 Find Cheap Flights from Belfast to Seattle - Compare and Save

Everything you should know

Cheap Flights from Belfast to Seattle

Recent round-trip flight deals from Belfast to Seattle

Recent one-way flight deals from Belfast to Seattle

Price, demand and travel trends for Belfast to Seattle flights

How much is a round-trip flight from Belfast to Seattle?

Which airline is the cheapest to fly from Belfast to Seattle?

What is the cheapest layover airport when flying from Belfast to Seattle?

When flying from Belfast to Seattle which airport offers the shortest layover?

Key details for Belfast to Seattle flights

Cheapest flight

When to book flights from Belfast to Seattle

Your Belfast to Seattle flight questions, answered

Your guide to booking Belfast to Seattle flights

More options for your flight from Belfast to Seattle

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

Information on your arrival and departure airports

Cabin class types available on flights from Belfast to Seattle

Find direct flights to and from Belfast and Seattle

Flights from domestic origins to Seattle

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