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Cheap flights from Seattle (SEA) to Belfast from $517

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 7/26. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SEA — BHD
Apr 28 — May 51
From?
To?
Sun 4/28
Sun 5/5
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 April 23, 2024.

Popular in

December

Cheapest in

February

Average price

$1,189

Round-trip from

$640
High demand for flights, 49% potential price rise
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Best time to find cheap flights, 43% potential price drop
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Average for round-trip flights in April 2024
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From Seattle/Tacoma Intl to Belfast
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What is the cheapest day to fly round-trip from Seattle to Belfast?

Sunday is generally a great day to depart. Flying on this day could help you save up to 37%.

What is the cheapest month to fly from Seattle to Belfast?

Our data shows that February tends to be the cheapest month to fly to Belfast from Seattle. Users have commonly found prices around $1,170 for the month, but tickets can be as low as $664. Due to multiple factors, prepare for potentially higher prices in December.

When is the cheapest time to fly from Seattle to Belfast (SEA - BFS)?

A simple way to save on the total cost of your ticket is to fly from Seattle to Belfast at noon. If you’re flexible enough to do this you can expect to save up to 17% on your trip compared to booking a flight in the afternoon.

Cheap American Airlines flights from Seattle to Belfast

Explore cheap flight options specifically provided by American Airlines for the route between Seattle and Belfast. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,086,534 searches. Data last updated April 23, 2024.
Find some of the cheapest American Airlines flights traveling from Seattle to Belfast. Deals update often to give you more flight options matching your criteria
Sat 9/711:33 amSEA - BHD
2 stops19h 32mAmerican Airlines
Sat 9/216:50 amBHD - SEA
1 stop12h 45mAmerican Airlines
Deal found 4/22$826
Sat 9/147:40 pmSEA - BHD
1 stop13h 10mAmerican Airlines
Sat 9/289:40 amBHD - SEA
2 stops21h 05mAmerican Airlines
Deal found 4/22$832
Sat 9/711:33 amSEA - BHD
2 stops16h 47mAmerican Airlines
Sat 9/216:50 amBHD - SEA
2 stops22h 21mAmerican Airlines
Deal found 4/22$836
Sat 9/141:45 pmSEA - BHD
2 stops18h 40mAmerican Airlines
Sat 9/289:40 amBHD - SEA
2 stops21h 05mAmerican Airlines
Deal found 4/22$848
Sat 8/107:40 pmSEA - BHD
1 stop12h 45mAmerican Airlines
Sat 8/244:15 pmBHD - SEA
1 stop27h 15mAmerican Airlines
Deal found 4/22$904
Sat 8/106:36 amSEA - BHD
2 stops19h 34mAmerican Airlines
Sat 8/244:15 pmBHD - SEA
1 stop27h 15mAmerican Airlines
Deal found 4/22$908
Sat 8/1011:33 amSEA - BHD
2 stops19h 32mAmerican Airlines
Sat 8/246:50 amBHD - SEA
2 stops22h 21mAmerican Airlines
Deal found 4/22$918
Sun 7/217:40 pmSEA - BHD
1 stop15h 00mAmerican Airlines
Mon 7/299:50 amBHD - SEA
1 stop33h 45mAmerican Airlines
Deal found 4/22$3,524

Cheap British Airways flights from Seattle to Belfast

Explore cheap flight options specifically provided by British Airways for the route between Seattle and Belfast. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,086,534 searches. Data last updated April 23, 2024.
Have a look at some of the cheapest available British Airways flights departing from Seattle and landing in Belfast. Ensure the flight price, dates, time, and airline match your criteria before you book.
Sat 9/147:40 pmSEA - BHD
1 stop15h 15mBritish Airways
Sat 9/286:50 amBHD - SEA
1 stop12h 45mBritish Airways
Deal found 4/22$847
Sat 9/77:40 pmSEA - BHD
1 stop13h 10mBritish Airways
Sat 9/216:50 amBHD - SEA
1 stop18h 40mBritish Airways
Deal found 4/22$850
Mon 6/171:30 pmSEA - BHD
1 stop15h 20mBritish Airways
Sun 6/236:50 amBHD - SEA
1 stop12h 40mBritish Airways
Deal found 4/23$1,636
Sat 6/157:40 pmSEA - BHD
1 stop12h 45mBritish Airways
Sun 6/236:50 amBHD - SEA
1 stop12h 40mBritish Airways
Deal found 4/23$1,668
Fri 6/141:30 pmSEA - BHD
1 stop17h 55mBritish Airways
Sun 6/236:50 amBHD - SEA
1 stop12h 40mBritish Airways
Deal found 4/23$1,677
Sun 6/161:40 pmSEA - BHD
1 stop13h 50mBritish Airways
Sun 6/236:50 amBHD - SEA
1 stop12h 40mBritish Airways
Deal found 4/23$1,738
Sun 6/161:40 pmSEA - BHD
1 stop13h 50mBritish Airways
Fri 6/216:35 amBHD - SEA
1 stop13h 00mBritish Airways
Deal found 4/23$1,985
Sat 6/157:40 pmSEA - BHD
1 stop13h 10mBritish Airways
Sat 6/226:50 amBHD - SEA
1 stop12h 45mBritish Airways
Deal found 4/23$2,000
Sat 6/157:40 pmSEA - BHD
1 stop13h 10mBritish Airways
Thu 6/2012:45 pmBHD - SEA
1 stop13h 00mBritish Airways
Deal found 4/23$2,006

Seattle to Belfast 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Belfast in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,086,534 searches. Data last updated April 23, 2024.
These are some of the best deals we've found on flights to Belfast in 2024 at this time. Check back in a little while for more flight options.
Sat 11/231:39 pmSEA - BHD
2 stops34h 36mBritish Airways
Mon 12/25:35 pmBHD - SEA
1 stop31h 10mBritish Airways
Deal found 4/23$681
Tue 10/297:45 pmSEA - BHD
1 stop15h 50mBritish Airways
Sun 11/39:40 amBHD - SEA
1 stop15h 05mBritish Airways
Deal found 4/23$687
Tue 10/292:35 pmSEA - BHD
1 stop16h 50mBritish Airways
Sun 11/35:35 amBHD - SEA
1 stop18h 10mBritish Airways
Deal found 4/22$689
Tue 10/291:39 pmSEA - BHD
2 stops17h 46mAmerican Airlines
Sun 11/35:35 amBHD - SEA
1 stop18h 10mAmerican Airlines
Deal found 4/23$692
Tue 10/291:39 pmSEA - BHD
2 stops17h 46mAmerican Airlines
Sun 11/39:40 amBHD - SEA
1 stop15h 05mAmerican Airlines
Deal found 4/22$693
Fri 10/46:05 pmSEA - BHD
1 stop14h 45mDelta
Tue 10/85:20 pmBHD - SEA
1 stop31h 30mDelta
Deal found 4/22$698
Thu 10/312:30 amSEA - BHD
2 stops32h 20mDelta
Tue 10/85:20 pmBHD - SEA
1 stop31h 30mDelta
Deal found 4/22$702
Tue 10/291:39 pmSEA - BHD
2 stops21h 56mAmerican Airlines
Sun 11/39:40 amBHD - SEA
2 stops20h 03mAmerican Airlines
Deal found 4/23$705
Tue 10/291:39 pmSEA - BHD
2 stops20h 01mAmerican Airlines
Sun 11/35:35 amBHD - SEA
2 stops23h 08mAmerican Airlines
Deal found 4/22$706

One-way flights to Belfast from Seattle

Search for one-way flight options from Seattle to Belfast. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,086,534 searches. Data last updated April 23, 2024.
Users in need of a one-way flight from Seattle to Belfast can choose from these deals. Users can also find round-trip Seattle to Belfast flights by using the search form above.
Fri 7/2611:00 pmSEA - BFS
2 stops32h 40mMultiple Airlines
Deal found 4/23$517
Fri 6/147:00 amSEA - BHD
3 stops53h 15mMultiple Airlines
Deal found 4/22$519
Fri 7/261:30 pmSEA - BHD
1 stop19h 20mDelta
Deal found 4/23$588
Fri 7/261:30 pmSEA - BHD
2 stops19h 20mDelta
Deal found 4/23$592
Fri 6/147:00 amSEA - BHD
2 stops29h 45mMultiple Airlines
Deal found 4/22$653
Fri 6/141:30 pmSEA - BHD
1 stop19h 20mDelta
Deal found 4/22$777
Thu 6/1312:20 amSEA - BHD
2 stops33h 50mAmerican Airlines
Deal found 4/22$1,105
Thu 9/261:50 pmSEA - BHD
3 stops46h 10mMultiple Airlines
Deal found 4/23$1,248
Thu 9/266:55 pmSEA - BHD
2 stops14h 25mMultiple Airlines
Deal found 4/23$1,809

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 3,086,534 searches. Data last updated April 23, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$698 - $1,052

Route

Depart

Return

Price

Seattle/Tacoma IntlBelfast City

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 10/4

1 stop14h 45m

Belfast City

Tue 10/8

1 stop31h 30m

$698

Seattle/Tacoma IntlBelfast City

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 10/3

2 stops32h 20m

Belfast City

Tue 10/8

1 stop31h 30m

$702

Seattle/Tacoma IntlBelfast City

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 10/4

2 stops20h 55m

Belfast City

Tue 10/8

1 stop25h 15m

$751

Seattle/Tacoma IntlBelfast City

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 9/7

2 stops19h 32m

Belfast City

Sat 9/21

1 stop12h 45m

$826

Seattle/Tacoma IntlBelfast City

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 9/14

1 stop13h 10m

Belfast City

Sat 9/28

2 stops21h 05m

$832

Seattle/Tacoma IntlBelfast City

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 9/14

1 stop15h 15m

Belfast City

Sat 9/28

1 stop12h 45m

$847

Seattle/Tacoma IntlBelfast City

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 9/7

1 stop13h 10m

Belfast City

Sat 9/21

1 stop18h 40m

$850

Seattle/Tacoma IntlBelfast City

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 6/12

1 stop16h 35m

Belfast City

Tue 6/18

1 stop28h 50m

$1,049

Seattle/Tacoma IntlBelfast Intl

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Sun 6/16

2 stops40h 50m

Belfast Intl

Wed 6/19

1 stop30h 25m

$1,052

Flights are sorted by cheapest first

Deals found on 4/22

When is the cheapest time to fly from Seattle to Belfast?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Belfast. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to Belfast flight should consider departing on Thursday evenings when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Belfast by month

Plan your trip from Seattle to Belfast by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to Belfast is currently $868 while a round-trip flight costs $845. Price data was last updated on April 21, 2024.

Currently, February is the cheapest month in which you can book a flight from Seattle to Belfast (average of $641). Flying from Seattle to Belfast in June is currently the most expensive (average of $1,185). 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.

January

$674

February

$641

March

$690

April

$699

May

$788

June

$1,185

July

$963

August

$867

September

$759

October

$684

November

$658

December

$728

Temperature and rainfall in Belfast by month

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

BFS

Temperature

41 - 60.8 °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 April 23, 2024.
Peruse reviews from past customers who have flown with American Airlines, British Airways and Delta from Seattle to Belfast to help guide your decision. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
11,028 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.6

Entertainment

8.0

Food

7.5

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Delta
8.1
Very good
11,028 reviews
Delta
8.1
Very good
11,028 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.6

Entertainment

8.0

Food

7.5

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

American Airlines
7.3
Good
14,914 reviews
Delta
8.1
Very good
11,028 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.6

Entertainment

8.0

Food

7.5

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Aer Lingus
7.2
Good
1,351 reviews
Delta
8.1
Very good
11,028 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.6

Entertainment

8.0

Food

7.5

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Iberia
7.1
Good
2,772 reviews
Delta
8.1
Very good
11,028 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.6

Entertainment

8.0

Food

7.5

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Lufthansa
7.0
Good
7,756 reviews
Delta
8.1
Very good
11,028 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.6

Entertainment

8.0

Food

7.5

Overall

8.1

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

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.

  • Can I find flights from Seattle to Belfast for under $700 on Cheapflights?

    Yes, there are multiple flights from Seattle to Belfast for under $700. The cheapest flight booked recently is on Delta for just $698, but on average you can expect to pay $899.

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

    Flying on Delta is currently your cheapest option to Belfast, with prices starting at $698. Additional round-trip tickets that might be worth considering are offered by American Airlines and British Airways, with the lowest prices starting at $826 and $847, respectively. Delta is 40% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airlines for a one-way flight from Seattle to Belfast are Delta ($588), American Airlines ($1,105), and Lufthansa ($3,038).

  • What does SEA to BFS mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Seattle/Tacoma Intl Airport to Belfast Intl Airport flight would often be abbreviated as a SEA to BFS flight. Belfast City Airport (BHD), Glasgow Prestwick Airport (PIK), Londonderry Eglinton Airport (LDY), Isle of Islay Glenegedale Airport (ILY), Campbeltown Machrihanish Airport (CAL) are some additional IATA codes for airports related to your trip.

  • Can I find deals for flights from Seattle to Belfast that include extra baggage allowance?

    The amount of baggage you can bring on your Seattle to Belfast flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Seattle to Belfast with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Belfast flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from Seattle to Belfast that allow pets onboard?

    Many airlines flying from Seattle to Belfast offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Seattle to Belfast?

    Yes, you can often find last-minute deals on Seattle to Belfast flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Seattle to Belfast flight deals updated?

    The Seattle to Belfast flight deals you see on this page were last updated on 4/23.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip
Complete your trip to Belfast by adding a car rental and/or hotel reservation to your travel itinerary.

Belfast car rentals
Belfast Intl Airport car rentals

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 3,086,534 searches. Data last updated April 23, 2024.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$642Average$924FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
British AirwaysCheapest$670Average$1,099FlexibilityNo cancel feeOn-time70%
Search British Airways flights
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Search flights from Seattle to Belfast by cabin class

Find flights from Seattle to Belfast, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Belfast?

Cheapflights makes it easy to find Seattle to Belfast flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Belfast?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Belfast for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Belfast with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Belfast flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to Belfast become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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