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Belfast City

$717+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$717
(SmartFares)

Popular in

August

Cheapest in

March
From Seattle/Tacoma Intl to Belfast City
Search Deals
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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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 junio 12, 2025.

This SmartFares deal was found by Cheapflights users on 6/12. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/48:20 pmSEA - BHD
1 stop15h 15mBritish Airways
mié. 8/206:15 pmBHD - SEA
1 stop25h 20mBritish Airways
Deal found 6/12$717
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/283:13 pmSEA - BHD
2 stops16h 42mAmerican Airlines
mar. 11/46:35 amBHD - SEA
1 stop12h 45mAmerican Airlines
Deal found 6/11$733
This Orbitz deal was found by Cheapflights users on 6/12. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/43:00 pmSEA - BHD
2 stops36h 30mIberia
mar. 10/146:35 amBHD - SEA
1 stop12h 35mIberia
Deal found 6/12$745
This American Airlines deal was found by Cheapflights users on 6/12. 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.
lun. 8/45:45 pmSEA - BHD
2 stops15h 45mMultiple Airlines
mié. 8/204:05 pmBHD - SEA
1 stop27h 30mMultiple Airlines
Deal found 6/12$769
This Mytrip deal was found by Cheapflights users on 6/12. 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.
lun. 8/47:35 pmSEA - BHD
2 stops17h 15mAer Lingus
mié. 8/207:00 amBHD - SEA
2 stops18h 50mAer Lingus
Deal found 6/12$797

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 junio 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

lun. 8/4

8:20 pm-7:35 pm

1 stop15h 15m

Belfast City

mié. 8/20

6:15 pm-11:35 am

1 stop25h 20m

$717

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

lun. 8/4

5:45 pm-5:30 pm

2 stops15h 45m

Belfast City

mié. 8/20

4:05 pm-11:35 am

1 stop27h 30m

$769

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

lun. 8/4

7:35 pm-8:50 pm

2 stops17h 15m

Belfast City

mié. 8/20

7:00 am-5:50 pm

2 stops18h 50m

$797

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

mar. 9/9

8:05 am-10:35 am

2 stops18h 30m

Belfast City

mar. 9/16

4:25 pm-8:12 pm

2 stops35h 47m

$4,964

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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 junio 12, 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.

Rainfall in Belfast City by month

Plan your trip to Belfast City by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Belfast City Airport ranges from 2.0 - 3.5 inches per month. October is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Belfast City Airport when rainfall is around 2.0 in.

Temperature in Belfast City by month

Plan your trip to Belfast City by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Belfast City Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

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 junio 12, 2025.
Aer Lingus
7.1
Good
1,117 reviews

Food

6.4

Boarding

7.2

Comfort

7.0

Overall

7.1

Entertainment

6.8

Crew

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - DUB

Most airlines board by group even though passengers are seated at the back. At Seatac, passengers were seated starting at the back. Otherwise, flight was good.
Aer Lingus
7.1
Good
1,117 reviews
Aer Lingus
7.1
Good
1,117 reviews

Food

6.4

Boarding

7.2

Comfort

7.0

Overall

7.1

Entertainment

6.8

Crew

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - DUB

Most airlines board by group even though passengers are seated at the back. At Seatac, passengers were seated starting at the back. Otherwise, flight was good.
Iberia
7.0
Good
2,776 reviews
Aer Lingus
7.1
Good
1,117 reviews

Food

6.4

Boarding

7.2

Comfort

7.0

Overall

7.1

Entertainment

6.8

Crew

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - DUB

Most airlines board by group even though passengers are seated at the back. At Seatac, passengers were seated starting at the back. Otherwise, flight was good.
British Airways
6.6
Okay
7,008 reviews
Aer Lingus
7.1
Good
1,117 reviews

Food

6.4

Boarding

7.2

Comfort

7.0

Overall

7.1

Entertainment

6.8

Crew

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - DUB

Most airlines board by group even though passengers are seated at the back. At Seatac, passengers were seated starting at the back. Otherwise, flight was good.

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 $717, was found to be the cheapest airline from Seattle to Belfast City Airport.Alternate airlines to your destination round-trip include Aer Lingus and Iberia.

  • 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
Portland to Belfast City flights
Seattle to Belfast Intl 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$572Average$782FlexibilityNo cancel feeOn-time70%

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