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Cheap flights from Belfast City Airport to Seattle from £517

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
9 Jul — 16 Jul1
1 adult

Cheap flight deals from Belfast City to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Belfast City (BHD) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 July 2025.

Round-trip from

£517

Popular in

July

Cheapest in

May

Average price

£802
British Airways
  • British Airways
  • 30/9-16/10
  • 2 total stops
  • 37h 40m total
  • Belfast to Seattle
Highest demand for flights based on searches. 18% potential increase in price (£99 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Average for round-trip flights in July 2025

Find flight deals from Belfast City to Seattle

Cheapest flights from Belfast City to Seattle
Explore the most affordable flight options available from Belfast City to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.

Tue 30/920:20BHD - SEA
1 stop23h 15mBritish Airways
Thu 16/1020:20SEA - BHD
1 stop14h 25mBritish Airways
Deal found 2/7£517
Tue 30/920:20BHD - SEA
2 stops31h 49mMultiple Airlines
Thu 16/1013:30SEA - BHD
1 stop15h 45mMultiple Airlines
Deal found 2/7£536
Mon 14/717:25BHD - SEA
1 stop30h 25mDelta
Mon 21/717:35SEA - BHD
1 stop19h 40mDelta
Deal found 2/7£621
Mon 14/706:40BHD - SEA
2 stops35h 54mAmerican Airlines
Mon 21/720:20SEA - BHD
1 stop13h 10mAmerican Airlines
Deal found 2/7£648

Cheapflights Fare Finder

Customise your flight search to find flights from Belfast City 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, Cheapflights users made 858,174 searches. Data last updated 4 July 2025.
Use the filters below to find and compare flights from Belfast City Airport to Seattle that are best for you.

Fly from

Belfast City

Fly to

Seattle

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 30/9

20:20-11:35

1 stop23h 15m

Seattle/Tacoma Intl

Thu 16/10

20:20-18:45

1 stop14h 25m

£517

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 30/9

20:20-20:09

2 stops31h 49m

Seattle/Tacoma Intl

Thu 16/10

13:30-13:15

1 stop15h 45m

£536

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 14/7

17:25-15:50

1 stop30h 25m

Seattle/Tacoma Intl

Mon 21/7

17:35-21:15

1 stop19h 40m

£621

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 14/7

06:40-10:34

2 stops35h 54m

Seattle/Tacoma Intl

Mon 21/7

20:20-17:30

1 stop13h 10m

£648

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 30/7

06:55-21:43

2 stops22h 48m

£987

Flights are sorted by cheapest return flights first.

Deals found on 2/7

Best time to book a flight from Belfast City to Seattle

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

Cheapflights Insights

Everything you need to know about your flight from Belfast City Airport to Seattle

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

Find hourly flight availability from Belfast City to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 July 2025.

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

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 4 July 2025.
See what other customers who have flown with Delta, American Airlines, andBritish Airways from Belfast City Airport to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very Good

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Belfast City to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Seattle from Belfast City?

    Most people fly into Seattle/Tacoma Intl (SEA) if they book a flight to Seattle from Belfast City. On average, Seattle/Tacoma Intl has 0 inbound flights from Belfast City per day from 0 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Belfast City Airport to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Belfast City Airport to Seattle (average of £622). Flying from Belfast City Airport to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Belfast City Airport?

Book flights to Belfast City Airport if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac

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Alternative routes for Belfast City to Seattle

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

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Belfast City to Seattle for you. Better yet — we are completely free to use.

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

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

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

Yes! Start tracking prices for Belfast City to Seattle 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.

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