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Belfast City

$743+ Cheap flights from Seattle (SEA) to Belfast City (BHD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Seattle to Belfast City

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Belfast City (BHD). 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 September 11, 2025.

Round-trip from

$704
(British Airways)

Popular in

July

Cheapest in

March

Average price

$993
From Seattle/Tacoma Intl to Belfast City
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Highest demand for flights based on searches. 8% potential increase in price ($83 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Seattle to Belfast City

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 September 11, 2025.

This British Airways deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:50 pmSEA - BHD
1 stop16h 20mBritish Airways
Sun 12/75:35 pmBHD - SEA
1 stop31h 20mBritish Airways
Deal found 9/10$743
This Cheapflightsfares deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/91:30 pmSEA - BHD
1 stop13h 40mBritish Airways
Tue 10/146:35 amBHD - SEA
1 stop12h 35mBritish Airways
Deal found 9/10$770
This Virgin Atlantic deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/33:05 pmSEA - BHD
1 stop21h 55mVirgin Atlantic
Sun 12/76:30 amBHD - SEA
1 stop13h 20mVirgin Atlantic
Deal found 9/8$777
This KLM deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/35:40 pmSEA - BHD
1 stop19h 35mKLM
Fri 10/106:30 amBHD - SEA
1 stop13h 20mKLM
Deal found 9/9$778
This American Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/31:39 pmSEA - BHD
2 stops17h 51mMultiple Airlines
Fri 10/106:35 amBHD - SEA
1 stop13h 00mMultiple Airlines
Deal found 9/9$785
This KLM deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/92:10 pmSEA - BHD
1 stop18h 45mKLM
Tue 10/146:30 amBHD - SEA
2 stops17h 40mKLM
Deal found 9/10$789
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/33:00 pmSEA - BHD
2 stops21h 45mBritish Airways
Fri 10/106:35 amBHD - SEA
1 stop13h 00mBritish Airways
Deal found 9/10$811

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Belfast City 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 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Seattle to Belfast City Airport that are best for you.

Fly from

Seattle

Fly to

Belfast City

Route

Depart

Return

Price

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 12/3

6:50 pm-7:10 pm

1 stop16h 20m

Belfast City

Sun 12/7

5:35 pm-4:55 pm

1 stop31h 20m

$743

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 12/3

3:05 pm-9:00 pm

1 stop21h 55m

Belfast City

Sun 12/7

6:30 am-11:50 am

1 stop13h 20m

$777

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 10/3

5:40 pm-9:15 pm

1 stop19h 35m

Belfast City

Fri 10/10

6:30 am-11:50 am

1 stop13h 20m

$778

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 10/3

1:39 pm-3:30 pm

2 stops17h 51m

Belfast City

Fri 10/10

6:35 am-11:35 am

1 stop13h 00m

$785

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 10/9

2:10 pm-4:55 pm

1 stop18h 45m

Belfast City

Tue 10/14

6:30 am-4:10 pm

2 stops17h 40m

$789

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 10/9

10:10 am-4:55 pm

2 stops22h 45m

Belfast City

Tue 10/14

6:30 am-4:54 pm

2 stops18h 24m

$793

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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.
Estimated round-trip 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 Seattle to Belfast City Airport

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

Find hourly flight availability from Seattle to Belfast City. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

It’s typically best to fly out from Seattle to Belfast City Airport at noon. Doing so could potentially save you 2% on the flight price compared to flying in the morning, which is usually more expensive.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Belfast City. 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 from for flights from Seattle to Belfast City?

    If you book a flight to Belfast City from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 0 flights from Seattle/Tacoma Intl to Belfast City per day from 0 different airlines.

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

    There are many flights that can get you from Seattle to Belfast City Airport in 16h 20m. Fly via British Airways, Virgin Atlantic, or KLM to get the fastest option. The distance between Seattle and Belfast City Airport is about 4472 mi. This flight may include one or multiple stops.

  • 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 vacation 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

Traveling to a place near Belfast City Airport?

Book flights to Belfast City Airport if you plan to visit one of these locations
Newcastle

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Alternative routes for Seattle to Belfast City

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