HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$656+ Cheap flights from Northern Ireland to Seattle (SEA)

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 3/22. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
Nov 19 — Nov 261
1 adult
Tue 11/19
Tue 11/26
We work with more than 300 partners to bring you better travel deals

...and more

Find cheap flights from Northern Ireland 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 Northern Ireland to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Northern Ireland (GBNIR) 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 November 14, 2024.

Find flight deals from Northern Ireland to Seattle

Cheapest flights from Northern Ireland to Seattle
Explore the most affordable flight options available from Northern Ireland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 14, 2024.

This British Airways deal was found by Cheapflights users on 11/14. 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.
Fri 11/158:40 amBHD - SEA
1 stop16h 15mBritish Airways
Sun 11/172:00 pmSEA - BHD
2 stops17h 30mBritish Airways
Deal found 11/14$1,242
This American Airlines deal was found by Cheapflights users on 11/14. 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.
Fri 11/157:35 pmBHD - SEA
1 stop23h 45mMultiple Airlines
Sun 11/171:59 pmSEA - BHD
2 stops17h 31mMultiple Airlines
Deal found 11/14$1,247
This KLM deal was found by Cheapflights users on 11/14. 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 11/155:20 pmBHD - SEA
1 stop26h 20mKLM
Sun 11/172:05 pmSEA - BHD
1 stop22h 55mKLM
Deal found 11/14$1,413
This Delta deal was found by Cheapflights users on 11/14. 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.
Fri 11/156:30 amBHD - SEA
2 stops16h 45mDelta
Sun 11/176:05 amSEA - BHD
2 stops26h 45mDelta
Deal found 11/14$1,419

Find flights from Northern Ireland to Seattle within your budget

Customize your flight search to find flights from Northern Ireland 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 2,752,363 searches. Data last updated November 14, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/8

6:35 am-4:00 pm

2 stops17h 25m

Seattle/Tacoma Intl

Thu 5/29

7:40 pm-5:40 pm

1 stop14h 00m

$872

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/8

6:30 am-11:25 pm

2 stops24h 55m

Seattle/Tacoma Intl

Thu 5/29

9:40 am-4:50 pm

2 stops23h 10m

$889

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 5/9

6:35 am-11:35 am

1 stop13h 00m

Seattle/Tacoma Intl

Fri 5/30

7:40 pm-6:10 pm

1 stop14h 30m

$951

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 5/9

6:35 am-11:35 am

1 stop13h 00m

Seattle/Tacoma Intl

Fri 5/30

7:40 pm-10:10 am

1 stop30h 30m

$980

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/22

3:05 pm-7:15 pm

2 stops35h 10m

$656

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 3/22

2:10 pm-6:00 pm

2 stops34h 50m

$714

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 3/22

11:15 am-5:55 pm

1 stop13h 40m

$871

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/14

Best time to book a flight from Northern Ireland to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Northern Ireland 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 Northern Ireland to Seattle

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

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 November 14, 2024.
Delta
8.0
Very good
8,788 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,788 reviews
Delta
8.0
Very good
8,788 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,788 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Aer Lingus
7.1
Good
1,084 reviews
Delta
8.0
Very good
8,788 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Iberia
7.0
Good
2,665 reviews
Delta
8.0
Very good
8,788 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

British Airways
6.7
Okay
6,838 reviews
Delta
8.0
Very good
8,788 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Northern Ireland 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 Northern Ireland?

    If you book a flight to Seattle from Northern Ireland, 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.

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

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

  • How can I find direct flights from Northern Ireland to Seattle?

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

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

    Yes. Cheapflights offers flight deals from Northern Ireland 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 Northern Ireland to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Northern Ireland to Seattle (average of $238). Flying from Northern Ireland to Seattle in July is currently the most expensive (average of $411). 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

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 Northern Ireland to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Seattle flights
Gatwick to Seattle flights
Heathrow to Portland flights
Gatwick to Portland flights
Manchester to Seattle flights
Luton to Seattle flights
Belfast Intl to Seattle flights
Belfast City to Seattle flights
Stansted to Seattle flights
Glasgow Intl to Seattle flights
Heathrow to Spokane flights
Gatwick to Spokane flights
Birmingham to Seattle flights
Edinburgh to Seattle flights
Leeds to Seattle flights
Manchester to Portland flights
Edinburgh to Portland flights
Glasgow Intl to Portland flights
Stansted to Portland flights
Bristol to Seattle flights
Luton to Portland flights
Newcastle upon Tyne to Seattle flights
Bristol to Portland flights
Southampton to Seattle flights
Manchester to Spokane flights
Newquay to Seattle flights
Grimsby to Portland flights
Birmingham to Portland flights
Birmingham to Spokane 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.
View all available airlines