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$369+ Cheap flights from 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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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 July 31, 2025.

Round-trip from

$420
(Booking.com)

One-way from

$369
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$1,000

Good one-way deal

$703 or less
From Ireland to Seattle/Tacoma Intl
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One-way flight from Ireland to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 19% potential increase in price ($176 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a one-way flight from Ireland to Seattle/Tacoma Intl.
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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 July 31, 2025.

This Booking.com deal was found by Cheapflights users on 7/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/512:40 pmDUB - SEA
1 stop33h 10mScandinavian Airlines
Sun 9/214:20 pmSEA - DUB
1 stop17h 55mScandinavian Airlines
Deal found 7/31$420
This Flightnetwork deal was found by Cheapflights users on 7/29. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/44:10 pmDUB - SEA
Nonstop9h 40mAer Lingus
Thu 9/187:35 pmSEA - DUB
Nonstop9h 05mAer Lingus
Deal found 7/29$521
This Cheapflightsfares deal was found by Cheapflights users on 7/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2111:30 amDUB - SEA
1 stop13h 30mIcelandair
Sat 12/132:35 pmSEA - DUB
1 stop11h 40mIcelandair
Deal found 7/29$565
This Mytrip deal was found by Cheapflights users on 7/31. 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 9/86:15 pmDUB - SEA
2 stops28h 50mMultiple Airlines
Mon 9/225:05 pmSEA - DUB
2 stops24h 10mMultiple Airlines
Deal found 7/31$592
This Gotogate deal was found by Cheapflights users on 7/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/149:15 pmSNN - SEA
2 stops28h 35mAer Lingus
Sun 9/217:35 pmSEA - SNN
2 stops17h 00mAer Lingus
Deal found 7/31$788
This Mytrip deal was found by Cheapflights users on 7/29. 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.
Fri 9/124:55 pmSNN - SEA
2 stops26h 30mMultiple Airlines
Fri 9/193:45 pmSEA - SNN
2 stops16h 05mMultiple Airlines
Deal found 7/29$800
This British Airways deal was found by Cheapflights users on 7/30. 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 11/157:50 amSNN - SEA
1 stop17h 05mBritish Airways
Tue 11/181:25 pmSEA - SNN
1 stop14h 05mBritish Airways
Deal found 7/30$831
This United Airlines deal was found by Cheapflights users on 7/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/279:30 amSNN - SEA
3 stops21h 22mUnited Airlines
Wed 9/37:10 amSEA - SNN
2 stops16h 20mUnited Airlines
Deal found 7/30$881
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Sat 11/157:50 amSNN - SEA
1 stop17h 05mAmerican Airlines
Tue 11/181:25 pmSEA - SNN
1 stop14h 05mAmerican Airlines
Deal found 7/28$927
This Gotogate deal was found by Cheapflights users on 7/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/148:30 pmORK - SEA
2 stops29h 20mAer Lingus
Wed 8/207:35 pmSEA - ORK
2 stops20h 10mAer Lingus
Deal found 7/30$1,026
This Air France deal was found by Cheapflights users on 7/30. 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.
Thu 8/146:00 amORK - SEA
1 stop17h 55mMultiple Airlines
Wed 8/201:30 pmSEA - ORK
1 stop17h 30mMultiple Airlines
Deal found 7/30$1,047
This Air Canada deal was found by Cheapflights users on 7/29. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/217:50 amSNN - SEA
3 stops33h 41mAir Canada
Sat 12/1310:05 amSEA - SNN
2 stops22h 40mAir Canada
Deal found 7/29$1,053

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated July 31, 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

Fri 9/5

12:40 pm-1:50 pm

1 stop33h 10m

Seattle/Tacoma Intl

Sun 9/21

4:20 pm-6:15 pm

1 stop17h 55m

$420

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 9/4

4:10 pm-5:50 pm

Nonstop9h 40m

Seattle/Tacoma Intl

Thu 9/18

7:35 pm-12:40 pm

Nonstop9h 05m

$521

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 11/21

11:30 am-5:00 pm

1 stop13h 30m

Seattle/Tacoma Intl

Sat 12/13

2:35 pm-10:15 am

1 stop11h 40m

$565

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 9/8

6:15 pm-3:05 pm

2 stops28h 50m

Seattle/Tacoma Intl

Mon 9/22

5:05 pm-1:15 am

2 stops24h 10m

$592

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Sun 9/14

9:15 pm-5:50 pm

2 stops28h 35m

Seattle/Tacoma Intl

Sun 9/21

7:35 pm-8:35 pm

2 stops17h 00m

$788

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Fri 9/12

4:55 pm-11:25 am

2 stops26h 30m

Seattle/Tacoma Intl

Fri 9/19

3:45 pm-3:50 pm

2 stops16h 05m

$800

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Sat 11/15

7:50 am-4:55 pm

1 stop17h 05m

Seattle/Tacoma Intl

Tue 11/18

9:00 am-4:45 pm

2 stops23h 45m

$831

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Wed 8/27

12:30 pm-9:56 pm

1 stop17h 26m

Seattle/Tacoma Intl

Wed 9/3

7:00 am-7:30 am

1 stop16h 30m

$881

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Sat 11/15

7:50 am-4:55 pm

1 stop17h 05m

Seattle/Tacoma Intl

Tue 11/18

1:25 pm-11:30 am

1 stop14h 05m

$927

CorkSeattle

ORK - SEA

ORKSEA

Cork

Thu 8/14

8:30 pm-5:50 pm

2 stops29h 20m

Seattle/Tacoma Intl

Wed 8/20

7:35 pm-11:45 pm

2 stops20h 10m

$1,026

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 20 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 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.

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 $238). Flying from Ireland to Seattle in June is currently the most expensive (average of $389). 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 July 31, 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 July 31, 2025.

The most flights from IE0 to SEA are scheduled on a Monday (3 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).

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 31, 2025.
Read through reviews of airlines operating flights from Ireland to Seattle, such as United Airlines, Scandinavian Airlines, and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,902 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,902 reviews
United Airlines
7.4
Good
8,902 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Scandinavian Airlines
7.4
Good
1,457 reviews
United Airlines
7.4
Good
8,902 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,902 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
WestJet
7.2
Good
2,977 reviews
United Airlines
7.4
Good
8,902 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Air Canada
7.1
Good
9,842 reviews
United Airlines
7.4
Good
8,902 reviews

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

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?

    If you book a flight to Seattle from 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.

  • How popular is this Ireland to Seattle flight route?

    This flight path from Ireland to Seattle/Tacoma Intl was viewed by 2 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    One-way options have recently been found by users for as low as $369 on WestJet. Other airlines that offer cheap prices include Scandinavian Airlines from $459 and Aer Lingus from $783 one-way.

  • What are the most popular routes from Ireland to Seattle?

    The most popular route from Ireland to Seattle is Dublin - Seattle/Tacoma Intl. You may also consider Cork - Seattle/Tacoma Intl or Shannon - Seattle/Tacoma Intl.

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

    The top 3 most reliable airlines when flying from Ireland to Seattle are American Airlines (85%), Aer Lingus (85%) and British Airways (85%).

  • What are the cheapest flights from Ireland to Seattle?

    On average you can expect to pay $2,929 for a flight from Ireland to Seattle. The cheapest flight overall is $572 while the most popular route, (Dublin - Seattle/Tacoma Intl) is currently priced at $422.

  • 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 vacation 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 $238). Flying from Ireland to Seattle in June is currently the most expensive (average of $389). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
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Tukwila
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Alternative routes for Ireland to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Ireland to Seattle

Discover the top 3 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 2,558,603 searches. Data last updated July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$712FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$605Average$816FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$684Average$803FlexibilityNo cancel feeOn-time71%

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