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Belfast City

$335+ Cheap flights from Seattle (SEA) to Belfast City (BHD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap 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 December 12, 2025.

This oojo deal was found by Cheapflights users on 12/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1211:34 amSEA - BHD
2 stops18h 41mBritish Airways
Fri 12/196:45 amBHD - SEA
2 stops41h 54mBritish Airways
Deal found 12/11$1,219
This Delta deal was found by Cheapflights users on 12/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/129:30 amSEA - BHD
2 stops23h 20mDelta
Fri 12/196:30 amBHD - SEA
1 stop13h 20mDelta
Deal found 12/11$1,490
This KLM deal was found by Cheapflights users on 12/11. 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 12/123:05 pmSEA - BHD
1 stop17h 45mKLM
Fri 12/196:30 amBHD - SEA
1 stop13h 20mKLM
Deal found 12/11$1,542
This Mytrip deal was found by Cheapflights users on 12/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/122:00 pmSEA - BHD
2 stops22h 50mMultiple Airlines
Fri 12/197:00 amBHD - SEA
3 stops23h 48mMultiple Airlines
Deal found 12/11$2,147

Find 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 December 12, 2025.

Most accurate provider

AranGrant
2 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$603
(Cheapflightsfares)

One-way from

$335
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$1,583
Provider with most accurate pricing for Seattle/Tacoma Intl-Belfast City flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Belfast City flights.
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From Seattle/Tacoma Intl to Belfast City
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One-way flight from Seattle/Tacoma Intl to Belfast City
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Highest demand for flights based on searches. 11% potential increase in price ($128 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($59 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 12, 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

Sat 3/7

1:35 pm-2:15 pm

1 stop16h 40m

Belfast City

Tue 3/17

6:35 am-12:30 pm

1 stop12h 55m

$603

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 2/19

6:50 pm-4:40 pm

1 stop13h 50m

Belfast City

Thu 2/26

10:40 am-4:55 pm

1 stop14h 15m

$603

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

1:35 pm-2:15 pm

1 stop16h 40m

Belfast City

Wed 3/18

12:25 pm-5:55 pm

1 stop12h 30m

$603

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 1/15

2:35 pm-5:25 pm

2 stops18h 50m

$335

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 1/15

6:50 pm-8:25 am

1 stop29h 35m

$413

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

  • Most accurate provider: When it comes to deals on Seattle-Belfast City Airport flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Belfast City Airport flight deals on Cheapflights vs. AranGrant 90-95% of the time. Price accuracy is based on data collected from Seattle-Belfast City Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Belfast City Airport flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Belfast City Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 December 12, 2025.

It’s typically best to fly out from Seattle to Belfast City Airport in the afternoon. Doing so could potentially save you 26% on the flight price compared to flying at noon, 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 40m. Fly via British Airways to get the fastest option. 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 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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