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Cheap flights from Seattle to Belfast City Airport from £394

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 21/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
22 Jan — 29 Jan1
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 17 January 2025.

Round-trip from

£588

One-way from

£394

Popular in

June

Cheapest in

November

Average price

£471
4/2-11/2
  • 4/2-11/2
  • 4 total stops
  • 51h 39m total
  • Seattle to Belfast
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21/5
  • 21/5
  • 2 total stops
  • 39h 10m total
  • Seattle to Belfast
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High demand for flights, 23% potential price rise
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Best time to find cheap flights, 6% potential price drop
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Average for round-trip flights in January 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 17 January 2025.

Tue 4/209:45SEA - BHD
2 stops26h 45mMultiple Airlines
Tue 11/207:25BHD - SEA
2 stops24h 54mMultiple Airlines
Deal found 16/1£588
Tue 4/213:35SEA - BHD
1 stop19h 10mFinnair
Tue 11/209:55BHD - SEA
1 stop15h 00mFinnair
Deal found 16/1£602
Tue 4/213:35SEA - BHD
2 stops19h 10mAmerican Airlines
Tue 11/206:35BHD - SEA
1 stop12h 45mAmerican Airlines
Deal found 16/1£607
Fri 2/513:30SEA - BHD
1 stop15h 15mBritish Airways
Sun 11/506:50BHD - SEA
1 stop19h 30mBritish Airways
Deal found 15/1£682
Fri 17/109:55SEA - BHD
2 stops22h 55mDelta
Fri 24/106:30BHD - SEA
1 stop13h 21mDelta
Deal found 16/1£753
Fri 18/718:45SEA - BHD
2 stops31h 25mAer Lingus
Fri 25/709:50BHD - SEA
2 stops15h 09mAer Lingus
Deal found 16/1£1,245
Fri 20/620:20SEA - BHD
1 stop13h 55mIberia
Sun 13/715:50BHD - SEA
1 stop27h 45mIberia
Deal found 17/1£3,830

Find flights from Seattle to Belfast City within your budget

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 17 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 4/2

09:45-20:30

2 stops26h 45m

Belfast City

Tue 11/2

07:25-00:19

2 stops24h 54m

£588

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 4/2

13:35-16:45

1 stop19h 10m

Belfast City

Tue 11/2

09:55-16:55

1 stop15h 00m

£602

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 4/2

13:35-16:45

2 stops19h 10m

Belfast City

Tue 11/2

06:35-11:20

1 stop12h 45m

£607

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 2/5

13:30-12:45

1 stop15h 15m

Belfast City

Sun 11/5

06:50-18:20

1 stop19h 30m

£682

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 20/6

20:20-18:15

1 stop13h 55m

Belfast City

Sun 13/7

15:50-11:35

1 stop27h 45m

£3,830

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 21/5

16:20-15:30

2 stops39h 10m

£394

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 20/5

20:20-19:25

1 stop15h 05m

£452

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 19/5

00:40-16:55

2 stops32h 15m

£569

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 23/5

18:45-20:25

2 stops17h 40m

£587

Flights are sorted by cheapest return flights first.

Deals found on 16/1

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.

Travel insights for flights from Seattle to Belfast City

Get recent, data-driven insights about flights from Seattle to Belfast City including ideal travel times, pricing trends, and more.

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 17 January 2025.
Delta
8.0
Very Good
8,513 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very Good
8,513 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair
7.6
Good
1,285 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Aer Lingus
7.1
Good
1,077 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Iberia
7.0
Good
2,641 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Overall

8.0

Comfort

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Boarding

8.2

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 £602. Other airlines that can offer you cheap pricing are American Airlines, from £607, and British Airways, from £682. Finnair is currently priced 15% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Seattle to Belfast City Airport one-way?

    For one-way options, check prices for British Airways. According to our data, you can fly for as low as £452. Users have also found prices from £569 and £587 on Delta and Aer Lingus, respectively.

  • 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

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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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