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Cheap flights from Seattle to Dublin from C$ 338

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 7/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DUB
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Dublin are usually found in January or November, booked 70 days in advance, depart on a Monday or Sunday and return on a Monday

Cheap flight deals from Seattle to Dublin

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Dublin (DUB). 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 11 September 2025.

Round-trip from

C$ 560

One-way from

C$ 338

Popular in

June

Cheapest in

January

Average price

C$ 890

Good round-trip deal

C$ 1,357 or less

Good one-way deal

C$ 568 or less
Icelandair
  • Icelandair
  • 13/12-17/4
  • 2 total stops
  • 25h 15m total
  • Seattle to Dublin
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WestJet
  • WestJet
  • 7/10
  • 1 total stop
  • 19h 45m total
  • Seattle to Dublin
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Highest demand for flights based on searches. 22% potential increase in price (C$ 375 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 57 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Dublin.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Dublin.
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Find flight deals from Seattle to Dublin

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

Sat 13/122:35 p.m.SEA - DUB
1 stop11h 40mIcelandair
Fri 17/412:15 p.m.DUB - SEA
1 stop13h 35mIcelandair
Deal found 11/9C$ 560
Tue 11/117:00 a.m.SEA - DUB
1 stop17h 10mUnited Airlines
Wed 19/119:00 a.m.DUB - SEA
2 stops23h 59mUnited Airlines
Deal found 10/9C$ 564
Tue 28/108:15 a.m.SEA - DUB
1 stop14h 55mUnited Airlines
Fri 14/119:00 a.m.DUB - SEA
2 stops23h 59mUnited Airlines
Deal found 9/9C$ 567
Wed 19/119:04 a.m.SEA - DUB
2 stops16h 51mUnited Airlines
Wed 26/119:00 a.m.DUB - SEA
1 stop21h 16mUnited Airlines
Deal found 11/9C$ 571
Mon 20/107:19 a.m.SEA - DUB
1 stop17h 56mDelta
Wed 5/1110:45 a.m.DUB - SEA
2 stops31h 48mDelta
Deal found 11/9C$ 572
Mon 1/122:35 p.m.SEA - DUB
1 stop11h 40mIcelandair
Sat 13/1211:30 a.m.DUB - SEA
1 stop13h 30mIcelandair
Deal found 11/9C$ 578
Wed 3/128:10 a.m.SEA - DUB
1 stop18h 10mUnited Airlines
Wed 10/1212:05 p.m.DUB - SEA
1 stop16h 49mUnited Airlines
Deal found 10/9C$ 585
Wed 29/109:04 a.m.SEA - DUB
2 stops17h 51mUnited Airlines
Wed 12/1112:05 p.m.DUB - SEA
2 stops20h 54mUnited Airlines
Deal found 11/9C$ 592
Sat 1/1110:05 p.m.SEA - DUB
1 stop28h 15mDelta
Wed 12/1111:30 a.m.DUB - SEA
1 stop18h 55mDelta
Deal found 9/9C$ 594
Sat 11/104:47 p.m.SEA - DUB
1 stop32h 58mUnited Airlines
Fri 24/109:20 a.m.DUB - SEA
1 stop32h 01mUnited Airlines
Deal found 11/9C$ 596
Sun 23/117:30 a.m.SEA - DUB
1 stop17h 50mDelta
Tue 14/43:00 p.m.DUB - SEA
2 stops29h 16mDelta
Deal found 11/9C$ 597

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Dublin 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 629,999 searches. Data last updated 11 September 2025.
Use the filters below to find and compare flights from Seattle to Dublin that are best for you.

Fly from

Seattle

Fly to

Dublin

Route

Depart

Return

Price

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sat 13/12

2:35 p.m.-10:15 a.m.

1 stop11h 40m

Dublin

Tue 14/4

2:15 p.m.-5:50 p.m.

1 stop11h 35m

C$ 560

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sun 7/12

2:35 p.m.-10:15 a.m.

1 stop11h 40m

Dublin

Thu 11/12

11:30 a.m.-5:00 p.m.

1 stop13h 30m

C$ 560

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 26/1

10:58 a.m.-8:10 a.m.

1 stop13h 12m

Dublin

Thu 5/2

10:40 a.m.-10:43 p.m.

1 stop20h 03m

C$ 585

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sat 24/1

2:10 p.m.-8:10 a.m.

1 stop34h 00m

Dublin

Wed 11/2

10:40 a.m.-10:43 p.m.

1 stop20h 03m

C$ 594

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sun 8/3

5:15 a.m.-6:10 a.m.

2 stops17h 55m

Dublin

Wed 25/3

9:30 a.m.-10:59 p.m.

2 stops20h 29m

C$ 594

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 25/11

9:28 a.m.-7:45 a.m.

1 stop14h 17m

Dublin

Tue 14/4

3:00 p.m.-12:16 p.m.

2 stops29h 16m

C$ 597

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 26/1

12:40 p.m.-8:10 a.m.

2 stops35h 30m

Dublin

Wed 11/2

10:40 a.m.-10:43 p.m.

1 stop20h 03m

C$ 601

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 27/10

8:00 a.m.-10:20 a.m.

1 stop19h 20m

Dublin

Wed 12/11

9:00 a.m.-10:16 p.m.

1 stop21h 16m

C$ 607

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 29/10

7:00 a.m.-9:55 a.m.

2 stops19h 55m

Dublin

Fri 14/11

9:00 a.m.-10:16 p.m.

1 stop21h 16m

C$ 614

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 15/10

7:00 a.m.-7:10 a.m.

2 stops16h 10m

Dublin

Wed 22/10

9:20 a.m.-6:36 p.m.

1 stop17h 16m

C$ 617

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 20 results
1
2

Best time to book a flight from Seattle to Dublin

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

How far ahead should I book a flight from Seattle to Dublin?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Dublin. Price data was last updated on 29 August 2025.

The best time to book flights from Seattle to Dublin is 70 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Dublin (average of C$ 458). Flying from Seattle to Dublin in December is currently the most expensive (average of C$ 760). 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 SEA to DUB?

Find hourly flight availability from Seattle to Dublin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 September 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Dublin in the morning. If you’re flexible enough to do this you can expect to save up to 39% on your trip compared to booking a flight in the afternoon.

What is the cheapest day to fly from Seattle to Dublin?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Dublin. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Seattle to Dublin flight should consider departing on Tuesday mornings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Dublin

Get insights into the airlines that provide service to Dublin. 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 Dublin. Reviews last updated 11 September 2025.
Check out reviews from past customers who have flown with Aer Lingus and Icelandair from Seattle to Dublin to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Food

6.5

Boarding

7.3

Overall

7.2

Entertainment

6.9

Crew

8.0

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
Aer Lingus
7.2
Good
1,271 reviews
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Food

6.5

Boarding

7.3

Overall

7.2

Entertainment

6.9

Crew

8.0

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
Icelandair
7.0
Good
546 reviews
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Food

6.5

Boarding

7.3

Overall

7.2

Entertainment

6.9

Crew

8.0

Comfort

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Dublin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Seattle to Dublin?

    If you wish to fly to Dublin from Seattle, then you need to book flights from Seattle/Tacoma Intl to Dublin. There are 2 flights from Seattle/Tacoma Intl (SEA) to Dublin (DUB) per day to choose from. Flights to Dublin from Seattle/Tacoma Intl are available from 2 different airlines, which means you should have some options if you want to compare airfare deals. 9h 05m is how long a nonstop flight from Seattle to Dublin typically takes.

  • How popular is this Seattle to Dublin flight route?

    Within the past month, 32 users have taken a look at flights from Seattle/Tacoma Intl to Dublin.

  • How long is the flight from Seattle to Dublin?

    A quick flight from Seattle to Dublin can take about 11h 40m. Icelandair provides one of the quickest options available for as low as C$ 560. Airlines will cover a distance of 7279 km. Both multi-stop and direct flights can be found to your destination and back.

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

    Flying on Icelandair is currently your cheapest option to Dublin, with prices starting at C$ 554. Another option worth looking into is Aer Lingus, starting at C$ 639 round trip. Icelandair is priced at 39% lower than the current average price of a flight leaving 3 months from now.

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

    One-way options have recently been found by users for as low as C$ 338 on WestJet. Other airlines that offer cheap prices include Icelandair from C$ 534 and United Airlines from C$ 553 one-way.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Seattle to Dublin on time: American Airlines (78%), Aer Lingus (78%), British Airways (78%).

  • What are the cheapest flights from Seattle to Dublin?

    Looking at all options, your cheapest flight can be booked for C$ 567. While the most popular route (Seattle/Tacoma Intl - Dublin) can be booked for C$ 847 on average, our data indicates C$ 1,085 when flying from Seattle to Dublin.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Dublin 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 Seattle to Dublin?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Dublin (average of C$ 458). Flying from Seattle to Dublin in December is currently the most expensive (average of C$ 760). 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

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Top 2 airlines flying from Seattle to Dublin

Discover the top 2 airlines that operate flights from Seattle to Dublin. 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 629,999 searches. Data last updated 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 554AverageC$ 834FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapestC$ 639AverageC$ 951FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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

When you search for this flight from Seattle to Dublin, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Dublin from Seattle.

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

Certainly. Search results for flights to Dublin from Seattle shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on Seattle to Dublin flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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