HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$820+ Cheap flights from Belfast City (BHD) to Seattle (SEA)

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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
Jul 16 — Jul 231
Wed 7/16
Wed 7/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Belfast City to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Belfast City to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Belfast City (BHD) to Seattle (SEA). 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 July 11, 2025.

Round-trip from

$820
(KLM)

Popular in

July

Cheapest in

May

Average price

$1,094
From Belfast City to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($186 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Belfast City to Seattle

Cheapest flights from Belfast City to Seattle
Explore the most affordable flight options available from Belfast City to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 11, 2025.

This KLM deal was found by Cheapflights users on 7/9. 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.
Sat 8/306:30 amBHD - SEA
1 stop17h 25mKLM
Thu 9/112:10 pmSEA - BHD
1 stop18h 45mKLM
Deal found 7/9$820
This Virgin Atlantic deal was found by Cheapflights users on 7/9. 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.
Sat 8/306:30 amBHD - SEA
2 stops20h 25mVirgin Atlantic
Thu 9/119:25 amSEA - BHD
2 stops23h 30mVirgin Atlantic
Deal found 7/9$841
This Air France deal was found by Cheapflights users on 7/9. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/306:30 amBHD - SEA
1 stop17h 25mMultiple Airlines
Fri 9/125:40 pmSEA - BHD
1 stop15h 15mMultiple Airlines
Deal found 7/9$861
This British Airways deal was found by Cheapflights users on 7/9. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/307:00 pmBHD - SEA
2 stops33h 02mBritish Airways
Wed 9/1010:11 amSEA - BHD
2 stops19h 19mBritish Airways
Deal found 7/9$984

Cheapflights Fare Finder

Customize your flight search to find flights from Belfast City to Seattle 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 July 11, 2025.
Use the filters below to find and compare flights from Belfast City Airport to Seattle that are best for you.

Fly from

Belfast City

Fly to

Seattle

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 8/30

6:30 am-3:55 pm

1 stop17h 25m

Seattle/Tacoma Intl

Thu 9/11

2:10 pm-4:55 pm

1 stop18h 45m

$820

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 8/30

6:30 am-6:55 pm

2 stops20h 25m

Seattle/Tacoma Intl

Thu 9/11

9:25 am-4:55 pm

2 stops23h 30m

$841

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 8/30

6:30 am-3:55 pm

1 stop17h 25m

Seattle/Tacoma Intl

Fri 9/12

5:40 pm-4:55 pm

1 stop15h 15m

$861

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 8/30

7:00 pm-8:02 pm

2 stops33h 02m

Seattle/Tacoma Intl

Wed 9/10

10:11 am-1:30 pm

2 stops19h 19m

$984

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 7/30

6:55 am-9:43 pm

2 stops22h 48m

$1,316

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 7/30

6:50 am-11:35 am

1 stop12h 45m

$1,553

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/10

Best time to book a flight from Belfast City to Seattle

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

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated July 11, 2025.
Get a feel of what it's like to fly with KLM, Virgin Atlantic, and British Airways from Belfast City Airport to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,372 reviews

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,372 reviews
KLM
7.8
Good
1,372 reviews

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
Virgin Atlantic
7.4
Good
653 reviews
KLM
7.8
Good
1,372 reviews

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
British Airways
6.6
Okay
7,109 reviews
KLM
7.8
Good
1,372 reviews

Overall

7.8

Boarding

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

Find useful and relevant information for your journey from Belfast City to Seattle. 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 into for flights to Seattle from Belfast City?

    If you book a flight to Seattle from Belfast City, you will be flying to 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 Belfast City to Seattle/Tacoma Intl per day from 0 different airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast City to Seattle 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 Belfast City Airport to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Belfast City Airport to Seattle (average of $238). Flying from Belfast City Airport to Seattle in June is currently the most expensive (average of $388). 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

Traveling to a place near Belfast City Airport?

Book flights to Belfast City Airport if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Lynnwood
Renton
Olympia
Shoreline
Puyallup
Cle Elum
Centralia
Kent
Chehalis
Kirkland
Aberdeen
Federal Way
Shelton

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Belfast City to Seattle

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

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.