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€356 Find Cheap Flights to Seattle – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
€459
Typical prices: €540-€868
Icelandair
Mon 8/10Sun 21/10
DUB - SEA • 1 stop
Cheapest direct flights
€588
Typical prices: €540-€873
Aer Lingus
Mon 8/10Sun 21/10
DUB - SEA • Direct
Top airlines
Best reviews • 7.3 score
Airline reviews
Airline reviews
Top routes
Cheapest • 18% average savings
Most popular
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 26 weeks in advance save around 46% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 21% price drop
Most popular
Good to know
+1
Good to know
+1
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We hope you enjoy your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights to Seattle

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals to Seattle

Thu, 8 Oct - Wed, 21 Oct
Icelandair Logo
14:15 - 17:55DUB  Dublin-SEA Seattle/Tacoma Intl
11h 40m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:40 - 13:15SEA  Seattle/Tacoma Intl-DUB Dublin
13h 35m1 stop Reykjavik Keflavik Intl
€459Icelandair
Wed, 9 Dec - Wed, 10 Feb
Icelandair Logo
11:30 - 17:00DUB  Dublin-SEA Seattle/Tacoma Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
14:35 - 10:15SEA  Seattle/Tacoma Intl-DUB Dublin
11h 40m1 stop Reykjavik Keflavik Intl
€477Icelandair
Thu, 8 Oct - Wed, 21 Oct
Icelandair Logo
14:15 - 17:55DUB  Dublin-SEA Seattle/Tacoma Intl
11h 40m1 stop Reykjavik Keflavik Intl
Icelandair Logo
15:40 - 13:15SEA  Seattle/Tacoma Intl-DUB Dublin
13h 35m1 stop Reykjavik Keflavik Intl
€482Icelandair
Mon, 2 Nov - Sun, 15 Nov
British Airways Logo
20:40 - 11:25DUB  Dublin-SEA Seattle/Tacoma Intl
22h 45m1 stop London Heathrow
British Airways Logo
18:45 - 14:55SEA  Seattle/Tacoma Intl-DUB Dublin
12h 10m1 stop London Heathrow
€523British Airways
Tue, 24 Nov - Sun, 29 Nov
British Airways Logo
11:00 - 16:50DUB  Dublin-SEA Seattle/Tacoma Intl
13h 50m1 stop London Heathrow
British Airways Logo
18:45 - 14:55SEA  Seattle/Tacoma Intl-DUB Dublin
12h 10m1 stop London Heathrow
€523British Airways
Mon, 2 Nov - Sun, 15 Nov
British Airways Logo
20:40 - 11:25DUB  Dublin-SEA Seattle/Tacoma Intl
22h 45m1 stop London Heathrow
British Airways Logo
18:45 - 14:55SEA  Seattle/Tacoma Intl-DUB Dublin
12h 10m1 stop London Heathrow
€525British Airways
Sun, 8 Nov - Sun, 15 Nov
Delta Logo
05:45 - 11:47DUB  Dublin-SEA Seattle/Tacoma Intl
14h 02m1 stop Amsterdam Schiphol
Delta Logo
15:25 - 14:25SEA  Seattle/Tacoma Intl-DUB Dublin
15h 00m1 stop Paris Charles de Gaulle
€541Delta
Thu, 11 Feb - Sat, 20 Feb
Multiple Airlines Logo
05:45 - 11:47DUB  Dublin-SEA Seattle/Tacoma Intl
14h 02m1 stop Amsterdam Schiphol
Multiple Airlines Logo
16:05 - 18:25SEA  Seattle/Tacoma Intl-DUB Dublin
18h 20m1 stop Paris Charles de Gaulle
€543Multiple Airlines
Thu, 8 Oct - Wed, 21 Oct
Aer Lingus Logo
15:25 - 17:10DUB  Dublin-SEA Seattle/Tacoma Intl
9h 45mdirect
Aer Lingus Logo
19:10 - 12:20SEA  Seattle/Tacoma Intl-DUB Dublin
9h 10mdirect
€588Aer Lingus
Thu, 8 Oct - Wed, 21 Oct
Aer Lingus Logo
15:25 - 17:10DUB  Dublin-SEA Seattle/Tacoma Intl
9h 45mdirect
Aer Lingus Logo
19:10 - 12:20SEA  Seattle/Tacoma Intl-DUB Dublin
9h 10mdirect
€593Aer Lingus
Booking Insights

Price, demand, and travel trends for Ireland to Seattle flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Ireland to Seattle with more confidence.

What is the cheapest flight to Seattle?

Dublin to Seattle is the cheapest route at €459 return, found in the past 5 days on KAYAK. KAYAK data shows this is also the most popular route.

How much is a flight to Seattle?

A return flight to Seattle costs €668 on average, based on data over the past 12 months on KAYAK. Return fares from Dublin average €659, while Shannon runs a bit higher at €760.

What is the cheapest day to fly to Seattle?

Wednesday is the cheapest day to fly to Seattle at €626 return on average over the past 12 months on KAYAK. Thursday is the most expensive at €905.

What is the cheapest month to fly to Seattle?

•April is the cheapest month to fly to Seattle with an average price of €530 return.
•July (€929) and August (€888) are the most expensive.
•Based on KAYAK data over the past 12 months.

What is the cheapest time of day to fly to Seattle?

Night flights to Seattle are the cheapest at €631 return on average. Evening flights are the most expensive at €1,146.

What is a good deal for flights to Seattle?

Flights under €540 are considered a good deal. 25% of KAYAK users found return flights to Seattle at or below these prices, with the lowest fares from:
•Dublin €536.

When are flights to Seattle the cheapest?

Flights to Seattle are cheapest 26 weeks before departure. Booking in this window typically costs about 46% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Key details for flights to Seattle

Low season

October

Cheapest flight

€356
Best time to beat the crowds (9% less expensive on average)
Most popular time to fly (4% more expensive on average)
Flights from Dublin to Seattle

When to book flights to Seattle

Are your dates flexible? Find out the best times to travel to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your questions about flights to Seattle, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • How do I know if a flight to Seattle is a good deal?

    A good deal on a flight to Seattle is around €540 return. This fare is in the lowest 25% of return flight prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.

  • How long is a direct flight to Seattle?

    Direct flights to Seattle are available from Dublin, with a flight time of about 9h 45m.

  • How expensive are last-minute flights to Seattle?

    Last-minute fares to Seattle – booked within 2 weeks of departure – run 24% above the average return fare of €668.

  • What is the difference between the most popular and the most frequent airline at Seattle?

    Aer Lingus operates the most flights from Ireland to Seattle at 0 per week, and for this route Aer Lingus is also the airline most often selected by KAYAK users searching for flights from Ireland to Seattle. The two are sometimes different because flight volume reflects an airline's schedule, while popularity reflects traveller choice.

  • Which airlines should I consider for flights to Seattle?

Your guide to booking Seattle flights

From booking to airport arrival, find tips to help you plan your flight with more confidence.
  • For the best chance at a low fare to Seattle, aim to book around 26 weeks before you fly. That window historically saves about 46% versus last-minute pricing based on KAYAK booking data over the last 12 months.
  • For flights to Seattle, recent KAYAK data shows that stronger deals tend to be around €540 return. If you see a fare below that threshold, it's a good deal – book before the price climbs back up.
  • If you can choose when to go, aim to travel to Seattle in April. Return fares historically average €530 that month – typically the cheapest month to travel based on the last 12 months.
  • Before you book:

    • Check the route's typical price range so you can spot a deal.
    • Confirm baggage fees and seat selection costs on budget carriers.
    • Verify whether you need any travel documents beyond an ID.
    • Pick a departure airport, since your nearest may not be the cheapest origin.
  • Shift your departure to evening to save up to €514 per return. Evening flights to Seattle average €631 compared to €1,146 for afternoon flights. See the time-of-day chart above for the full breakdown.
  • Bag allowances vary by airline, fare type, cabin class, and route. On flights to Seattle, some airlines may include bags at no extra cost. For example, Aer Lingus includes a cabin bag and a checked bag in Economy class, American Airlines includes a cabin bag and a checked bag in Economy class, and Iberia includes a cabin bag and a checked bag in Economy class. Always check the fare details before booking, since bag policies can change by ticket type.
  • Once you arrive in Seattle, a great place to start is Seattle Marriott Waterfront. It is popular with first-time visitors and can give you a good feel for the area.

Reviews of the top 3 airlines flying to Seattle

 
Need help choosing which airline to fly with to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.3
Aer LingusOverall score based on 1793 reviews
7.0Entertainment
8.1Crew
7.4Boarding
6.7Food
7.2Comfort
Airline reviews

The thing thy call a pizza was atrocious. Do not eat it. The seating is as usual for economy an experiment in cruel and unusual punishment that they aren't allowed to do to prisoners but you get to pay for it.

4.0 OkayAnonymous, Sept 2026
Read more Aer Lingus reviews

The thing thy call a pizza was atrocious. Do not eat it. The seating is as usual for economy an experiment in cruel and unusual punishment that they aren't allowed to do to prisoners but you get to pay for it.

Didn't make it to this flight as we sat on the tarmac for 1.5 hours.

The crew was first rate. They allowed me to switch my middle seat to an isle seat and it made my flight home so much more comfortable.

Everything went very smoothly I loved having the earphones and the blanket and the staff was just super friendly

I was advertised a free seat selection for a "Smart" fare through BusinessClass.com. I was never able to select a seat. I thus paid extra for a bill of goods I was never provided. would love to speak with a representative of Kayak

Overall good. We weren't able to find out about food options for the flight and there was nothing I could eat due to allergies. The biggest problem was getting our checked bag at Logan. Waited an hour!

One of the best flights I've been on in a while. Very genuinely friendly staff. Courteous, kind, respectful. On a past flight (not Aer Lingus) I remember being woken up rudely to put my seat forward. Like a child being berated for something. Oddly jarring experience when someone could just tap you gently on the shoulder and gesture kindly. But I noticed the Aer Lingus staff were incredibly patient with everyone on the plane. It's the holiday season and I noticed a lot more elderly customers on the plane than I typically see flying, and the staff went above and beyond with helping accommodate people. Service throughout the flight was flawless. They came through offering water, and picking up garbage at perfect intervals. Seemed like this flight, everyone was on point. And the flight landed early on top of that

Dear Aer Lingus Customer Care, I am writing to formally raise a complaint regarding my recent experience on Aer Lingus flight EI53 from Dublin to Seattle on 22/08/2025. Both my wife and I were seated in 15D, 15E directly under a faulty air conditioning unit. Even though the unit was switched off, cold air continued seeping through the sides and blew directly onto us for the entire duration of the flight (over 9 hours). We reported the issue to the cabin crew, but the only attempted solution was placing a piece of food-packaging sticker over the vent. Unsurprisingly, this had no effect. When we pressed further, the crew told us: “It is hard to fix it because we don’t have an engineer on board.” As a result, my wife and I remained exposed to constant cold airflow for the whole flight, and both of us became unwell afterwards, experiencing chills, sore throat and fever at the end of the flight. This has caused significant distress, disrupted our work plans. This experience highlights both a serious maintenance issue and a lack of adequate care for passengers. We therefore request: A full investigation into the defective AC system on this aircraft. An explanation of why no effective remedy (such as reseating us) was provided. Compensation for the illness and disruption caused to both myself and my wife. We ask for a full written response within 28 days. Should this matter not be satisfactorily resolved, we are prepared to escalate the complaint to the Irish Aviation Authority and Commission for Aviation Regulation and other relevant authorities. Thank you for your urgent attention to this matter. Sincerely, Temuujin Tuvshingal Myagmarsuren Ganbold

Nicest staff I’ve experienced on a plane! Good food, great entertainment, and they gave out little blankets that my kids loved. All in all, great experience.

Crew was fantastic got lovely food and plenty of water. Entertainment was good. Never had to ask for anything. Left on time and got to Seattle early. Luggage did not take long either.

Great experience in Saga Premium. Food was tasty and felt fresh. Seat was comfortable (enough) - would have wanted a layflat seat.

The flight itself was excellent, but getting to the plane was literally an exercise in pain. My wife needs a wheelchair and can only stand/walk for short periods before having extreme pain. We had to take a bus to a loading platform and use a terrible elevator to get up to the plane. Meanwhile the rest of the bus were using the stairs. This meant the people who needed to sit down were stuck standing at the end of the line while everyone else boarded. My wife was in agony.

The ticket was reserved in my name but not paid for by underpricer. Alaska airlines was unable to issue my ticket (could not connect the ticket with the PNR) due to an error with underpricer and I spent the better part of 2 hours at the ticket counter trying to rectify.

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

I am not going to fillo this out for each leg of my trip. My first review holds for the experience

They wouldn’t check in my luggage even though I had one checked bag prepaid. So I took my bag to the gate and tried to check it in there and two employees scolded me for bringing a large bag to the gate. I told them I was trying to check it in and that it was prepaid, and they said they couldn’t guarantee that it would arrive at my destination but they finally let me drop it off when boarding the plane and pick it up right after exiting the plane. There was no food, and there was no entertainment.

The boarding process seem to take longer than necessary, resulting in a 20+ minute delay

One of the worst airlines I ever flew. Boarding is a disaster, they are always late, the planes are overly crowded. Everyone on my flight lost their connection because they were 2h late. Reykjavik is also not the best airport out there.

Flight was delayed. They did a terrible job rebooking me. Agent on the ground was useless. The partner airline who ran the plane was able to help me but Iceland air was useless

Flight delayed Delay to the gate upon arrival Baggage took more than an hour so we missed our connecting!!! Terrible experience!

ok. It's a short flight and it was delayed, hence the ok rating.

Crew members were thorough in checking seatbelts and whatnot which makes me feel cared for because passenger safety is a main concern.

Smooth flight. The seats were comfortable but the reclining mechanism didn't work very well. My wife's seat required the flight attendant to push the seat forward while she pushed the button. The leg support didn't want to return to its home under the seat. I ordered the diabetic meal which was full of carbs. It was low in sugar but carbs turn into sugar so was it really diabetic? Overall the flight was pleasant, long but pleasant.

Not my definition of first class. No leg room and barely any recline. The food was good. The crew was great. The comfort for the price I paid for London to Cairo was highway robbery. The Wi-Fi didn't work for me either.

The crew was very nice and pleasant. We were very reluctant to book our flight with British Airlines because we had bad experience with their flight attendants on the previous trips, they were rude and not helpful.

Adequate to good experience. Comfort was mediocre but everything else was good..

Boarding was poor. Why are first class passengers not boarded first?! Bus to the plane and then held on a packed bus because we were waiting for people on the bus before to finish boarding. Seat belt on the fist clas seat is very uncomfortable, cutting into your neck. Other than that crew, seating and food were all excellent. Entertainment, as usual - rubbish.

Had a very bad experience flying out of London. Our initial flight was cancelled without notice and the next flight had a layover of 8 extra hours. Me, my husband and my 8-year-old were already sick, and this further added to our problems. We paid extra for the seats: I was not even given our chosen seats which we paid for months before the trip. We were shoved into the available seats which were middle ones in the back (we had paid for front window, aisle, aisle). The seats were so uncomfortable and getting out of middle seats every so often (with a sick child) was a task. We had initially chosen British Airways because of the short layover, however, that went out of the window. Although unexpected things happen all the time and I understand customers have to adjust for the unplanned, however, how the airlines react and make the passengers comfortable during that time is the real test. We were not given any compensation for food or any arrangement to stay comfortable during that time. In fact, our paid seats were taken away as well.

Crew very helpful and friendly. Food is so so. Main meal is not always the best. Did have a choice of a snack part way which was either a cookie, corn snack, or similar. Second kind of meal was basically like a pizza pastry that really wasn’t a favorite but probably a European snack? Screens and selections of movies, tv and such were good. No WI-Fi unless you buy so no free texting or such on the long flight but I think that might be any overseas flight.

Please make sure the number of seats matches the number of overhead bins and passengers don't carry on more than one bag.

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