Question 1

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

Accepted Answer

Flying to Seattle from Ireland in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $739 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the morning, with an average ticket price of $750. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Question 2

How many flights depart from Ireland to Seattle on average per week?

Accepted Answer

As of December 2025, there are 16 flights per week flying from Ireland to Seattle. The most common day of the week flights depart is Mon, with 25% of flights taking off on this day.

Question 3

Which airline has the best punctuality record on Ireland to Seattle flights?

Accepted Answer

According to our data, Aer Lingus have had the least number of delays on this route over the last 12 months; with about 11% of their flights experiencing any sort of delay.

Question 4

How many flights depart from Ireland to Seattle on average per day?

Accepted Answer

The number of flights available between Ireland and Seattle is 2 per day as of December 2025. The most frequent departure time is 4:00PM, with 100% of daily flights leaving in the afternoon.

Question 5

What cabin class options are available on Ireland to Seattle/Tacoma Intl flights?

Accepted Answer

There are 3 cabin classes available to choose from on Ireland to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Question 6

What is the cheapest airline that flies from Ireland to Seattle/Tacoma Intl?

Accepted Answer

WestJet, Aer Lingus, and British Airways are the most popular carriers operating from Ireland to Seattle/Tacoma Intl

Question 7

How often are flights from Ireland to Seattle delayed?

Accepted Answer

Historically, on average around 11% of flights between Ireland and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 141 minutes.

Question 8

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

Accepted Answer

On average, the least expensive day to fly to Seattle from Ireland is on a Sunday. momondo users have found tickets for Sunday departures for as low as $613. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Thursday is the most expensive day to depart from Ireland because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $997.

Question 9

What is the most punctual flight time for Ireland to Seattle flights?

Accepted Answer

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Question 10

How long does it take to fly to Seattle?

Accepted Answer

Flight times vary depending on what airport in Ireland you fly out of and what airport in Seattle you fly into. For example, flying from Dublin to Seattle takes 9h 39m on average. On the other hand, flying from Shannon to Seattle takes 18h 12m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

Question 11

What is the cheapest month to fly to Seattle?

Accepted Answer

In general, February is the cheapest month to fly from Ireland to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $605. If you don’t want to visit Seattle in February, then you should wait until November to fly from Ireland, when ticket prices are also cheap, with an average price of $633.

Question 12

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Saturday has historically seen more delays on average compared to the rest of the week.

Question 13

Can stopping save me money on Ireland to Seattle flights?

Accepted Answer

You could potentially save up to 39% on your flight if you consider stops on a Ireland to Seattle flight.

Question 14

What is the cheapest Ireland to Seattle/Tacoma Intl flight route?

Accepted Answer

Fly from Dublin to Seattle/Tacoma Intl for the best Ireland - Seattle/Tacoma Intl flight prices

Question 15

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 $713 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Ireland for as low as $652 on momondo.

Question 16

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

Accepted Answer

Prices for flights from Ireland to Seattle/Tacoma Intl Airport were last updated today.

Question 17

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

Accepted Answer

As of December 2025, there is 1 operator available to choose from for flights from Ireland to Seattle/Tacoma Intl Airport.

Question 18

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

Accepted Answer

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ireland to Seattle/Tacoma Intl Airport.

Question 19

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

Accepted Answer

The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best Price Found	$619
Fastest flight time	9h 39m
Direct flights	Every day
Airports in Seattle	1 airport

Cheap flights from Ireland to Seattle from $296

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ireland to Seattle departing on 4/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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How to get the cheapest flight ticket from Ireland to Seattle

What is the cheapest month to fly to Seattle?

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

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

What is the cheapest Ireland to Seattle/Tacoma Intl flight route?

Fly from Dublin to Seattle/Tacoma Intl for the best Ireland - Seattle/Tacoma Intl flight prices

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

What cabin class options are available on Ireland to Seattle/Tacoma Intl flights?

There are 3 cabin classes available to choose from on Ireland to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ireland to Seattle flights?

You could potentially save up to 39% on your flight if you consider stops on a Ireland to Seattle flight.

What is the cheapest airline that flies from Ireland to Seattle/Tacoma Intl?

WestJet, Aer Lingus, and British Airways are the most popular carriers operating from Ireland to Seattle/Tacoma Intl

How often are flights from Ireland to Seattle delayed?

Historically, on average around 11% of flights between Ireland and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 141 minutes.

What is the most punctual flight time for Ireland to Seattle flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Saturday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Ireland to Seattle flights?

According to our data, Aer Lingus have had the least number of delays on this route over the last 12 months; with about 11% of their flights experiencing any sort of delay.

How many flights depart from Ireland to Seattle on average per day?

The number of flights available between Ireland and Seattle is 2 per day as of December 2025. The most frequent departure time is 4:00PM, with 100% of daily flights leaving in the afternoon.

How many flights depart from Ireland to Seattle on average per week?

As of December 2025, there are 16 flights per week flying from Ireland to Seattle. The most common day of the week flights depart is Mon, with 25% of flights taking off on this day.

How long does it take to fly to Seattle?

Cheap Ireland to Seattle flight deals and tips

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

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

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

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

What is the most popular plane model from Ireland to Seattle?

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