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$668+ Cheap flights from Seattle (SEA) to Belfast

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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BHD
Dec 27 — Jan 31
Fri 12/27
Fri 1/3
1 adult, Economy
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Cheap flight deals from Seattle to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Belfast (BF1). 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 December 22, 2024.

Round-trip from

$668
(Mytrip)

Popular in

June

Cheapest in

October

Average price

$940
From Seattle/Tacoma Intl to Belfast
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High demand for flights, 16% potential price rise
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Best time to find cheap flights, 5% potential price drop
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Average for round-trip flights in December 2024
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Find flight deals from Seattle to Belfast

Best flights from Seattle to Belfast
Discover carefully curated flight deals from Seattle to Belfast that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 22, 2024.

This Mytrip deal was found by Cheapflights users on 12/21. 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.
Mon 2/32:35 pmSEA - BFS
2 stops20h 25mMultiple Airlines
Mon 2/107:25 amBFS - SEA
2 stops17h 35mMultiple Airlines
Deal found 12/21$668
This oojo deal was found by Cheapflights users on 12/20. 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.
Tue 2/41:35 pmSEA - BHD
2 stops21h 05mBritish Airways
Tue 2/116:35 amBHD - SEA
2 stops21h 29mBritish Airways
Deal found 12/20$744
This American Airlines deal was found by Cheapflights users on 12/21. 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 2/41:35 pmSEA - BHD
2 stops17h 20mAmerican Airlines
Tue 2/116:35 amBHD - SEA
1 stop18h 20mAmerican Airlines
Deal found 12/21$779
This Trip.com deal was found by Cheapflights users on 12/21. 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.
Tue 2/42:35 pmSEA - BHD
2 stops21h 55mMultiple Airlines
Tue 2/117:25 amBHD - SEA
2 stops17h 35mMultiple Airlines
Deal found 12/21$705
This Delta deal was found by Cheapflights users on 12/21. 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 2/192:09 pmSEA - BHD
1 stop18h 41mDelta
Sun 3/26:30 amBHD - SEA
2 stops20h 30mDelta
Deal found 12/21$3,964
This Virgin Atlantic deal was found by Cheapflights users on 12/21. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/2012:00 pmSEA - BHD
2 stops50h 00mVirgin Atlantic
Fri 3/286:30 amBHD - SEA
1 stop13h 10mVirgin Atlantic
Deal found 12/21$4,377
This AranGrant deal was found by Cheapflights users on 12/21. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/207:50 pmSEA - BHD
1 stop16h 00mIberia
Fri 3/288:40 amBHD - SEA
1 stop16h 15mIberia
Deal found 12/21$5,517

Find flights from Seattle to Belfast within your budget

Customize your flight search to find flights from Seattle to Belfast 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 December 22, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Mon 2/3

2:35 pm-7:00 pm

2 stops20h 25m

Belfast Intl

Mon 2/10

7:25 am-5:00 pm

2 stops17h 35m

$668

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 2/4

2:35 pm-8:30 pm

2 stops21h 55m

Belfast City

Tue 2/11

7:25 am-5:00 pm

2 stops17h 35m

$705

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 2/4

1:35 pm-6:40 pm

2 stops21h 05m

Belfast City

Tue 2/11

6:35 am-8:04 pm

2 stops21h 29m

$744

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 2/4

1:35 pm-2:55 pm

2 stops17h 20m

Belfast City

Tue 2/11

6:35 am-4:55 pm

1 stop18h 20m

$779

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 2/19

2:09 pm-4:50 pm

1 stop18h 41m

Belfast City

Sun 3/2

6:30 am-7:00 pm

2 stops20h 30m

$3,964

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 3/20

12:00 pm-9:00 pm

2 stops50h 00m

Belfast City

Fri 3/28

6:30 am-12:40 pm

1 stop13h 10m

$4,377

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 3/20

7:50 pm-6:50 pm

1 stop16h 00m

Belfast City

Fri 3/28

8:40 am-5:55 pm

1 stop16h 15m

$5,517

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Best time to book a flight from Seattle to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast 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.

Travel insights for flights from Seattle to Belfast

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

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

Currently, February is the cheapest month in which you can book a flight from Seattle to Belfast (average of $657). Flying from Seattle to Belfast in June is currently the most expensive (average of $1,189). 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.

What is the cheapest time of day to fly from SEA to BFS?

Find hourly flight availability from Seattle to Belfast. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 22, 2024.

A simple way to save on the total cost of your ticket is to fly from Seattle to Belfast in the morning. If you’re flexible enough to do this you can expect to save up to 23% on your trip compared to booking a flight at noon.

Rainfall in Belfast by month

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

In terms of precipitation, rainfall in Belfast 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 when rainfall is around 2.0 in.

Temperature in Belfast by month

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

If weather is an important factor for your trip to Belfast, 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

Get insights into the airlines that provide service to Belfast. 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. Reviews last updated December 22, 2024.
Delta
8.0
Very good
8,597 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.2

Food

7.3

Entertainment

7.9

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
8,597 reviews
Delta
8.0
Very good
8,597 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 10

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

Virgin Atlantic
7.5
Good
668 reviews
Delta
8.0
Very good
8,597 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.2

Food

7.3

Entertainment

7.9

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
8,597 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 10

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

Iberia
7.0
Good
2,652 reviews
Delta
8.0
Very good
8,597 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 10

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

British Airways
6.6
Okay
6,815 reviews
Delta
8.0
Very good
8,597 reviews

Comfort

8.0

Overall

8.0

Crew

8.6

Boarding

8.2

Food

7.3

Entertainment

7.9

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. 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?

    If you book a flight to Belfast 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 per day from 2 different airlines.

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

    Flying on British Airways is currently your cheapest option to Belfast, with prices starting at $744. Additional round-trip tickets that might be worth considering are offered by American Airlines and Delta, with the lowest prices starting at $779 and $3,964, respectively. British Airways is 22% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Seattle to Belfast that include hotel bookings?

    Yes. In addition to deals on Seattle to Belfast flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Belfast?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Belfast.

  • Can I find deals for business class flights from Seattle to Belfast?

    Yes. Cheapflights offers flight deals from Seattle to Belfast 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?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Belfast (average of $657). Flying from Seattle to Belfast in June is currently the most expensive (average of $1,189). 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

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

Top 2 airlines flying from Seattle to Belfast

Discover the top 2 airlines that operate flights from Seattle to Belfast. 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 December 22, 2024.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$544Average$891FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$573Average$791FlexibilityNo cancel feeOn-time71%
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