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Cheap flights from Seattle to Belfast City Airport from £528

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
18 Jun — 25 Jun1
1 adult

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 13 June 2025.

Round-trip from

£528

Popular in

August

Cheapest in

March
British Airways
  • British Airways
  • 4/8-20/8
  • 2 total stops
  • 40h 35m total
  • Seattle to Belfast
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£123 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£28 potential savings vs. average return price).
Search Deals

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 13 June 2025.

Mon 4/820:20SEA - BHD
1 stop15h 15mBritish Airways
Wed 20/818:15BHD - SEA
1 stop25h 20mBritish Airways
Deal found 12/6£528
Tue 28/1013:29SEA - BHD
2 stops17h 06mAmerican Airlines
Tue 4/1111:30BHD - SEA
1 stop13h 25mAmerican Airlines
Deal found 13/6£539
Sat 4/1015:00SEA - BHD
2 stops36h 30mIberia
Tue 14/1006:35BHD - SEA
1 stop12h 35mIberia
Deal found 12/6£548
Mon 4/817:45SEA - BHD
2 stops15h 45mMultiple Airlines
Wed 20/816:05BHD - SEA
1 stop27h 30mMultiple Airlines
Deal found 12/6£566
Mon 4/819:35SEA - BHD
2 stops17h 15mAer Lingus
Wed 20/807:00BHD - SEA
2 stops18h 50mAer Lingus
Deal found 12/6£587

Cheapflights Fare Finder

Customise 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 858,174 searches. Data last updated 13 June 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

Mon 4/8

20:20-19:35

1 stop15h 15m

Belfast City

Wed 20/8

18:15-11:35

1 stop25h 20m

£528

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 28/10

13:29-13:35

2 stops17h 06m

Belfast City

Tue 4/11

11:30-16:55

1 stop13h 25m

£539

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 4/10

15:00-11:30

2 stops36h 30m

Belfast City

Tue 14/10

06:35-11:10

1 stop12h 35m

£548

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 4/8

17:45-17:30

2 stops15h 45m

Belfast City

Wed 20/8

16:05-11:35

1 stop27h 30m

£566

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 4/8

19:35-20:50

2 stops17h 15m

Belfast City

Wed 20/8

07:00-17:50

2 stops18h 50m

£587

Flights are sorted by cheapest return flights first.

Deals found on 12/6

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 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 Seattle to Belfast City Airport

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 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast City Airport when rainfall is around 50.0 mm.

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 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

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 13 June 2025.
American Airlines
7.2
Good
10,000 reviews
Check prices

Entertainment

6.9

Overall

7.2

Boarding

7.5

Food

6.5

Crew

8.0

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Entertainment

6.9

Overall

7.2

Boarding

7.5

Food

6.5

Crew

8.0

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.
Aer Lingus
7.1
Good
1,118 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Entertainment

6.9

Overall

7.2

Boarding

7.5

Food

6.5

Crew

8.0

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.
Iberia
7.0
Good
2,776 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Entertainment

6.9

Overall

7.2

Boarding

7.5

Food

6.5

Crew

8.0

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.
British Airways
6.6
Okay
7,011 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Entertainment

6.9

Overall

7.2

Boarding

7.5

Food

6.5

Crew

8.0

Comfort

7.2

Reviews

1 / 20
10.0
Excellent

Leonardo,May 2025

JFK - BGI

Good airline and so far i give them 8 out of 10.

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?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Belfast City. You should not have trouble finding flights to Belfast City from Seattle/Tacoma Intl; the airport handles an average of 0 outbound flights to Belfast City per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Seattle airport to Belfast City. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

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

    Cheapflights users have booked flights from Seattle to Belfast City Airport round-trip from £528. Other airlines that can offer you cheap pricing are American Airlines, from £539, and Iberia, from £548.

  • 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 holiday 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.

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

    Currently, April is the cheapest month in which you can book a flight from Seattle to Belfast City Airport (average of £98). Flying from Seattle to Belfast City Airport in December is currently the most expensive (average of £116). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Newcastle
Bangor
Carrickfergus

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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

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Yes! Start tracking prices for Seattle to Belfast City 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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