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Belfast City

$604+ 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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
Jul 16 — Jul 231
Wed 7/16
Wed 7/23
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 July 11, 2025.

Round-trip from

$734
(Mytrip)

One-way from

$604
(KAYAK)

Popular in

August

Cheapest in

March

Average price

$1,145
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. 19% potential increase in price ($228 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 11, 2025.

This Mytrip deal was found by Cheapflights users on 7/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/33:45 pmSEA - BHD
2 stops20h 50mMultiple Airlines
Wed 9/107:05 amBHD - SEA
2 stops21h 35mMultiple Airlines
Deal found 7/9$734
This oojo deal was found by Cheapflights users on 7/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:46 amSEA - BHD
2 stops18h 29mBritish Airways
Thu 11/206:35 amBHD - SEA
2 stops24h 40mBritish Airways
Deal found 7/9$759
This American Airlines deal was found by Cheapflights users on 7/9. 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.
Thu 11/61:41 pmSEA - BHD
2 stops18h 59mAmerican Airlines
Thu 11/209:00 amBHD - SEA
2 stops22h 15mAmerican Airlines
Deal found 7/9$795
This Delta deal was found by Cheapflights users on 7/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/311:25 amSEA - BHD
2 stops21h 30mDelta
Wed 9/106:30 amBHD - SEA
1 stop17h 35mDelta
Deal found 7/9$851
This KLM deal was found by Cheapflights users on 7/9. 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.
Wed 9/35:40 pmSEA - BHD
1 stop15h 15mKLM
Wed 9/105:25 pmBHD - SEA
1 stop30h 40mKLM
Deal found 7/9$883

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 July 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 9/3

3:45 pm-8:35 pm

2 stops20h 50m

Belfast City

Wed 9/10

7:05 am-8:40 pm

2 stops21h 35m

$734

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 11/5

7:46 am-10:15 am

2 stops18h 29m

Belfast City

Thu 11/20

6:35 am-11:15 pm

2 stops24h 40m

$759

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 11/6

1:41 pm-4:40 pm

2 stops18h 59m

Belfast City

Thu 11/20

9:00 am-11:15 pm

2 stops22h 15m

$795

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/3

11:25 am-4:55 pm

2 stops21h 30m

Belfast City

Wed 9/10

6:30 am-4:05 pm

1 stop17h 35m

$851

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/3

5:40 pm-4:55 pm

1 stop15h 15m

Belfast City

Wed 9/10

5:25 pm-4:05 pm

1 stop30h 40m

$883

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 8/22

7:35 pm-10:10 am

2 stops30h 35m

$604

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 10/14

2:35 pm-11:55 am

2 stops37h 20m

$793

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 10/15

8:20 pm-11:10 am

1 stop30h 50m

$997

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/9

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 July 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.

Reviews of airlines servicing Belfast City

Get insights into the airlines that provide service to Belfast City. 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 Belfast City. Reviews last updated July 11, 2025.
See what other customers who have flown with Delta, KLM, and Finnair from Seattle to Belfast City Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,951 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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!
Delta
8.0
Very good
7,951 reviews
Delta
8.0
Very good
7,951 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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!
KLM
7.8
Good
1,372 reviews
Delta
8.0
Very good
7,951 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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!
Finnair
7.6
Good
1,312 reviews
Delta
8.0
Very good
7,951 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,951 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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!
British Airways
6.6
Okay
7,109 reviews
Delta
8.0
Very good
7,951 reviews

Crew

8.5

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Entertainment

7.9

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 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 1 airline.

  • What are the cheapest airlines flying from Seattle to Belfast City Airport round-trip?

    British Airways, at $759, was found to be the cheapest airline from Seattle to Belfast City Airport.Alternate airlines to your destination round-trip include American Airlines and Delta.

  • 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

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Alternative routes for Seattle to Belfast City

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Belfast Intl flights
Seattle to Belfast Intl flights
Portland to Belfast City flights

Top airline flying from Seattle to Belfast City

Discover the top airline that operate flights from Seattle to Belfast City. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$572Average$782FlexibilityNo cancel feeOn-time70%

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