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Cheap flights from Ireland to Seattle from £328

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
24 Jun — 1 Jul1
1 adult

Cheap flight deals from Ireland to Seattle

Keep the following information in mind while searching for Ireland to Seattle flight deals. Data was last updated 19 June 2025.

Round-trip from

£328

Popular in

July

Cheapest in

February

Average price

£638

Good round-trip deal

£589 or less
Scandinavian Airlines
  • Scandinavian Airlines
  • 6/9-19/9
  • 2 total stops
  • 68h 40m total
  • Ireland to Seattle
Highest demand for flights based on searches. 20% potential increase in price (£104 potential increase over avg. return price).
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Average for round-trip flights in June 2025
Price to beat on a round-trip flight from Ireland to Seattle/Tacoma Intl.

Find flight deals from Ireland to Seattle

Cheapest flights from Ireland to Seattle
Explore the most affordable flight options available from Ireland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 June 2025.

Sat 6/910:15DUB - SEA
1 stop35h 35mScandinavian Airlines
Fri 19/916:20SEA - DUB
1 stop33h 05mScandinavian Airlines
Deal found 18/6£328
Fri 7/1111:30DUB - SEA
1 stop13h 30mIcelandair
Wed 12/1114:35SEA - DUB
1 stop11h 40mIcelandair
Deal found 19/6£379
Fri 7/1110:45DUB - SEA
1 stop14h 10mBritish Airways
Mon 10/1118:50SEA - DUB
1 stop29h 05mBritish Airways
Deal found 19/6£436
Fri 7/1109:00DUB - SEA
2 stops23h 59mUnited Airlines
Wed 12/1105:05SEA - DUB
2 stops17h 55mUnited Airlines
Deal found 19/6£505
Fri 24/1005:55DUB - SEA
1 stop13h 55mDelta
Sun 26/1012:10SEA - DUB
2 stops21h 30mDelta
Deal found 18/6£508
Fri 24/1016:10DUB - SEA
Nonstop9h 40mAer Lingus
Sun 26/1023:55SEA - DUB
1 stop22h 20mAer Lingus
Deal found 18/6£556
Mon 11/809:45DUB - SEA
1 stop14h 15mFinnair
Sun 24/807:44SEA - DUB
1 stop18h 01mFinnair
Deal found 19/6£594
Mon 30/610:40DUB - SEA
1 stop19h 13mJetBlue
Thu 10/711:43SEA - DUB
1 stop13h 17mJetBlue
Deal found 18/6£649
Sat 28/608:40DUB - SEA
1 stop14h 10mSWISS
Tue 15/713:45SEA - DUB
2 stops34h 10mSWISS
Deal found 18/6£670
Fri 24/1012:15DUB - SEA
3 stops34h 01mMultiple Airlines
Sun 26/1015:50SEA - DUB
2 stops20h 45mMultiple Airlines
Deal found 18/6£672

Cheapflights Fare Finder

Customise your flight search to find flights from 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 858,174 searches. Data last updated 19 June 2025.
Use the filters below to find and compare flights from Ireland to Seattle that are best for you.

Fly from

Ireland

Fly to

Seattle

Route

Depart

Return

Price

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 6/9

10:15-13:50

1 stop35h 35m

Seattle/Tacoma Intl

Fri 19/9

16:20-09:25

1 stop33h 05m

£328

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 7/11

11:30-17:00

1 stop13h 30m

Seattle/Tacoma Intl

Wed 12/11

14:35-10:15

1 stop11h 40m

£379

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 7/11

10:45-16:55

1 stop14h 10m

Seattle/Tacoma Intl

Mon 10/11

18:50-07:55

1 stop29h 05m

£436

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 7/11

09:00-00:59

2 stops23h 59m

Seattle/Tacoma Intl

Wed 12/11

05:05-07:00

2 stops17h 55m

£505

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 24/10

05:55-11:50

1 stop13h 55m

Seattle/Tacoma Intl

Sun 26/10

12:10-16:40

2 stops21h 30m

£508

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 24/10

16:10-17:50

Nonstop9h 40m

Seattle/Tacoma Intl

Sun 26/10

23:55-05:15

1 stop22h 20m

£556

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 11/8

09:45-16:00

1 stop14h 15m

Seattle/Tacoma Intl

Sun 24/8

07:44-09:45

1 stop18h 01m

£594

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 30/6

10:40-21:53

1 stop19h 13m

Seattle/Tacoma Intl

Thu 10/7

11:43-09:00

1 stop13h 17m

£649

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 11/8

09:20-22:16

2 stops20h 56m

Seattle/Tacoma Intl

Sun 24/8

08:00-10:20

1 stop18h 20m

£663

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 24/10

12:15-14:16

3 stops34h 01m

Seattle/Tacoma Intl

Sun 26/10

15:50-19:35

2 stops20h 45m

£672

Flights are sorted by cheapest return flights first.

Deals found on 19/6

Showing 1-10 of 17 results
1
2

Best time to book a flight from Ireland to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Ireland with our price prediction graph.
Estimated return 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 Ireland to Seattle

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

Currently, January is the cheapest month in which you can book a flight from Ireland to Seattle (average of £622). Flying from Ireland to Seattle in July is currently the most expensive (average of £946). 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 IE to SEA?

Find hourly flight availability from Ireland to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 19 June 2025.

When flying from Ireland to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Ireland to Seattle

Explore weekly flight availability from Ireland to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 19 June 2025.

The most flights from IE0 to SEA are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

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 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 19 June 2025.
Read through reviews of airlines operating flights from Ireland to Seattle, such as Delta, Finnair and United Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very Good

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from 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 Ireland?

    For a flight from Ireland to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city.

  • How popular is this Ireland to Seattle flight route?

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

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as £339. However, be on the lookout for offers from JetBlue and Icelandair, as they are both options that can get you from Ireland to Seattle for a low price.

  • What are the most reliable airlines from Ireland to Seattle?

    Before booking your flight to Seattle from Ireland, check out the most reliable airlines to get you to your destination on time: American Airlines (88%), Aer Lingus (88%), British Airways( 88%).

  • What are the cheapest flights from Ireland to Seattle?

    The cheapest flight price from Ireland to Seattle is £498. On average you can expect to pay £667. The most popular route, (Dublin - Seattle/Tacoma Intl), can usually be booked for £565.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from 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 Ireland to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Ireland to Seattle (average of £622). Flying from Ireland to Seattle in July is currently the most expensive (average of £946). 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

Travelling to a place near Ireland?

Book flights to Ireland if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Ireland to Seattle

Discover the top 4 airlines that operate flights from Ireland to Seattle. 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 858,174 searches. Data last updated 19 June 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£348Average£522FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£377Average£503FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£429Average£597FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
American AirlinesCheapest£498Average£667FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ireland to Seattle.

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

Yes, we can. To see specific flights from Ireland to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Of course! You can now track prices for flights from Ireland to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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