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Belfast City

$446+ 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 6/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,010
(Cheapflightsfares)

One-way from

$446
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$785
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. 18% potential increase in price ($209 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($51 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:50 pmSEA - BHD
1 stop15h 50mBritish Airways
Tue 11/46:35 amBHD - SEA
1 stop12h 45mBritish Airways
Deal found 4/29$763
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Tue 10/2810:46 amSEA - BHD
2 stops16h 44mAmerican Airlines
Tue 11/46:35 amBHD - SEA
1 stop12h 45mAmerican Airlines
Deal found 4/29$770
This Delta deal was found by Cheapflights users on 4/28. 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.
Sun 5/46:07 pmSEA - BHD
1 stop19h 08mDelta
Mon 5/125:25 pmBHD - SEA
1 stop26h 15mDelta
Deal found 4/28$887
This Trip.com deal was found by Cheapflights users on 4/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/27:00 pmSEA - BHD
2 stops17h 25mMultiple Airlines
Sun 5/117:05 amBHD - SEA
2 stops21h 35mMultiple Airlines
Deal found 4/29$938
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/37:35 pmSEA - BHD
2 stops15h 50mAer Lingus
Tue 6/107:00 amBHD - SEA
2 stops18h 50mAer Lingus
Deal found 4/28$1,010
This KLM deal was found by Cheapflights users on 4/29. 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 5/25:12 pmSEA - BHD
2 stops15h 43mKLM
Sat 5/105:25 pmBHD - SEA
1 stop30h 32mKLM
Deal found 4/29$1,036

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 April 29, 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

Tue 6/3

7:35 pm-7:25 pm

2 stops15h 50m

Belfast City

Tue 6/10

7:00 am-5:50 pm

2 stops18h 50m

$1,010

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 6/12

7:05 am-8:55 pm

3 stops29h 50m

Belfast City

Thu 6/19

7:05 am-3:03 pm

3 stops39h 58m

$1,053

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 6/3

8:20 pm-7:25 pm

1 stop15h 05m

Belfast City

Tue 6/10

6:35 am-11:10 am

1 stop12h 35m

$1,116

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 6/29

1:55 pm-4:55 pm

1 stop19h 00m

Belfast City

Thu 7/10

5:25 pm-11:35 am

1 stop26h 10m

$3,754

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 6/25

9:50 am-4:55 pm

2 stops23h 05m

Belfast City

Sun 7/6

6:30 am-3:50 pm

1 stop17h 20m

$4,478

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 6/20

5:54 pm-9:15 am

3 stops55h 21m

$446

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 6/3

8:20 pm-5:30 pm

1 stop13h 10m

$752

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 6/20

1:55 pm-4:55 pm

1 stop19h 00m

$858

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/27

  • 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 >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 April 29, 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 April 29, 2025.
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,076 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
6,837 reviews
Delta
8.0
Very good
7,936 reviews

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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?

    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?

    Aer Lingus, at $1,010, was found to be the cheapest airline from Seattle to Belfast City Airport.Alternate airlines to your destination round-trip include British Airways and KLM.

  • 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.
Seattle to Belfast Intl flights
Portland 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$572Average$782FlexibilityNo cancel feeOn-time70%

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