Question 1

Why should I use momondo to find a flight deal to Seattle?

Accepted Answer

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle.

Question 2

Can I find flights to Seattle with flexible booking policies on momondo?

Accepted Answer

Flights to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

Question 3

How can momondo help me find flights to Seattle?

Accepted Answer

Once all potential Seattle flight options are in front of you momondo lets you sort and filter flights based on preferences such as airline, price and flight times, amongst many other options.

Question 4

I’m not ready to book a flight to Seattle right now. Can momondo alert me if prices change?

Accepted Answer

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle and alert you when they change.

Question 5

How far in advance should I book a flight to Seattle?

Accepted Answer

We recommend purchasing flights from Ireland to Seattle 58 days ahead of your departure date because this is when momondo users tend to see the best flight rates. On average, our users have found flights to Seattle for €618. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Ireland for as low as €368 on momondo.

Question 6

Is there an alternative airport near Seattle?

Accepted Answer

Seattle Lake Union Spb Airport, Seattle King County/Boeing Airport, Kenmore Air Harbor Airport, Everett Paine Field Airport or Lopez Island Airport can be an alternative airport used for travel to Seattle.

Question 7

Which airlines fly to Seattle?

Accepted Answer

Based on our data, the most popular airlines that fly to Seattle from Ireland are Aer Lingus and Icelandair. There may also be other airline options depending on where in Ireland you’re flying from.

Question 8

Aer Lingus Flights to Seattle

Accepted Answer

14 Aer Lingus flights head to Seattle on average each week. Most will be flying from London Heathrow to Seattle, the most popular route that Aer Lingus operates to Seattle. Prices vary based on when and where you fly from - the cheapest Aer Lingus flight to Seattle found in the past 3 days on momondo was €466, departing from Dublin. Aer Lingus is the most popular choice on momondo for this route and has been scored 7.2/10 by 1,508 of our users.

Question 9

Icelandair Flights to Seattle

Accepted Answer

Icelandair flights to Seattle can start from as low as €382 (return, from Dublin, found in the last 72 hours). Over 14 flights that Icelandair operates to Seattle in a normal week, prices can vary significantly. The most popular Icelandair flight to Seattle is from Boise Air Term. Gowen Fld. Icelandair has been rated 7.0/10 by momondo users, in 634 reviews.

Question 10

When did momondo last update prices for flights to Seattle/Tacoma Intl Airport?

Accepted Answer

Prices for flights to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

Question 11

How many operators does momondo search for flights to Seattle/Tacoma Intl Airport?

Accepted Answer

As of April 2026, there are 2 operators available to choose from for flights to Seattle/Tacoma Intl Airport.

Question 12

How old do you have to be to fly to Seattle/Tacoma Intl Airport?

Accepted Answer

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel to Seattle/Tacoma Intl Airport.

Question 13

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

Accepted Answer

The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Question 14

What is the cheapest day to depart on your flight to Seattle?

Accepted Answer

Our data shows that Wednesday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as €657. Flights from Ireland to Seattle on a Tuesday will generally be more expensive and average around €831. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Question 15

What is the cheapest month to fly to Seattle?

Accepted Answer

If you’re not able to fly to Seattle in February, then September is your next best option. Flight prices from Ireland to Seattle during September average around €532.

Question 16

How long does it take to fly to Seattle?

Accepted Answer

On average, it takes 9h 45m to fly from Ireland to Seattle if you fly out of Dublin (the most popular airport in Ireland) and into Seattle/Tacoma Intl (the most popular airport in Seattle). If you’re flying out of Cork and into Seattle/Tacoma Intl, then the flight time is around 23h 28m.

Question 17

How far in advance should I book a flight to Seattle?

Accepted Answer

You are more likely to see cheaper flights to Seattle from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around €618 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Ireland for as low as €507 on momondo.

CHEAPEST MONTH TO FLY TO SEATTLE FROM DUBLIN	February	15% cheaper	Flying from Dublin to Seattle costs on average just €529 in February
MOST EXPENSIVE MONTH TO FLY TO SEATTLE FROM DUBLIN	July	39% more expensive	It costs about €863 for flights to Seattle from Dublin in July
MOST POPULAR MONTH TO FLY TO SEATTLE FROM DUBLIN	May	471% more users visited	More momondo users searched in flights to Seattle from Dublin in May than any other month

Best One-Way Price	€323
Best Round-Trip Price	€453
Fastest flight time	32h 00m
Popular in	July

€323 Cheap flights to Seattle

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Seattle departing on 6/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Ireland to Seattle

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

Recent direct flight deals from Ireland to Seattle

momondo Fare Finder

Use the filters below to find and compare flights to Seattle that are best for you.

See travel insights to Seattle from

Seattle flights insights and trends

What is the cheapest month to fly to Seattle?

What is the absolute cheapest flight to Seattle?

See prices from:

What is the cheapest day to depart on your flight to Seattle?

How far in advance should I book a flight to Seattle?

How long does it take to fly to Seattle?

Cheapest flights to Seattle/Tacoma Intl

Find the cheapest flights to Seattle/Tacoma Intl from your nearest city or airport

Cheap Seattle flight deals and tips

Summary info about Seattle flight prices, duration and airlines

Best One-Way Price

Best Round-Trip Price

Fastest flight time

Popular in

Frequently asked questions about flying to Seattle

Travelling to a place near Seattle?

Why use momondo?

An easier way to manage your Seattle/Tacoma Intl trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Seattle

Popular Flights to Seattle

Popular routes according to searches in the past day on momondo

Popular Cities in the United States

Popular flights according to clicks in the last 7 days on momondo

Airports servicing Ireland

Fly your favourite airline to Seattle

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Complete your trip to Seattle/Tacoma Intl

Explore popular destinations other users love

According to popular flight searches on momondo this year