SEA - SNN

$345 Find Cheap Flights from Seattle to Shannon

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Shannon departing on 1/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Shannon

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Shannon, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Shannon, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$470
American Airlines
Sun 3/1Tue 3/10
SEA - SNN • 1 stop
Cheapest one-way
$345
Multiple Airlines
Thu 1/8
SEA - SNN • 2 stops
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Shannon!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Shannon (SEA-SNN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Shannon that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Shannon

Sun, Mar 1 - Tue, Mar 10
American Airlines Logo
6:50 pm - 4:45 pm
SEA
-
SNN
13h 55m1 stop
American Airlines Logo
7:50 am - 5:55 pm
SNN
-
SEA
17h 05m1 stop
$470American Airlines
Sun, Mar 1 - Tue, Mar 10
American Airlines Logo
7:15 am - 11:30 am
SEA
-
SNN
20h 15m2 stops
American Airlines Logo
7:50 am - 5:55 pm
SNN
-
SEA
17h 05m1 stop
$474American Airlines
Sun, Mar 1 - Tue, Mar 10
American Airlines Logo
1:49 pm - 4:45 pm
SEA
-
SNN
18h 56m2 stops
American Airlines Logo
7:50 am - 9:54 pm
SNN
-
SEA
21h 04m2 stops
$484American Airlines
Tue, Apr 14 - Sat, Apr 25
American Airlines Logo
1:35 pm - 11:20 am
SEA
-
SNN
13h 45m1 stop
American Airlines Logo
7:40 am - 11:05 pm
SNN
-
SEA
23h 25m2 stops
$530American Airlines
Tue, Apr 14 - Sat, Apr 25
American Airlines Logo
1:33 pm - 4:10 pm
SEA
-
SNN
18h 37m2 stops
American Airlines Logo
7:40 am - 11:05 pm
SNN
-
SEA
23h 25m2 stops
$534American Airlines
Tue, Apr 14 - Sat, Apr 25
American Airlines Logo
1:35 pm - 8:35 pm
SEA
-
SNN
23h 00m1 stop
American Airlines Logo
7:40 am - 6:25 pm
SNN
-
SEA
18h 45m1 stop
$575American Airlines
Fri, Jan 30 - Tue, Feb 3
Air Canada Logo
3:40 pm - 3:45 pm
SEA
-
SNN
16h 05m2 stops
Air Canada Logo
7:50 am - 9:15 am
SNN
-
SEA
33h 25m2 stops
$669Air Canada
Fri, Jan 30 - Tue, Feb 3
Air Canada Logo
3:40 pm - 3:45 pm
SEA
-
SNN
16h 05m2 stops
Air Canada Logo
7:50 am - 9:15 am
SNN
-
SEA
33h 25m2 stops
$670Air Canada
Fri, Jan 30 - Tue, Feb 3
British Airways Logo
1:35 pm - 11:30 am
SEA
-
SNN
13h 55m1 stop
British Airways Logo
7:50 am - 2:34 pm
SNN
-
SEA
38h 44m2 stops
$671British Airways
Fri, Jan 30 - Tue, Feb 3
British Airways Logo
6:50 pm - 3:45 pm
SEA
-
SNN
12h 55m1 stop
British Airways Logo
8:05 pm - 4:55 pm
SNN
-
SEA
28h 50m1 stop
$672British Airways
Booking Insights

KAYAK's insights & trends for Seattle to Shannon flights

Get data-powered insights and trends into flights from Seattle to Shannon to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly non-stop between Seattle and Shannon?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Seattle to Shannon.

There are 3 airlines that fly nonstop from Seattle to Shannon. They are: Aer Lingus, American Airlines and United Airlines. The cheapest price of all airlines flying this route was found with American Airlines at $488 for a round-trip flight. On average, the best prices for this route can be found at American Airlines.

Good to know

Cheapest flight$345
Flight from Seattle to Shannon

When to book flights from Seattle to Shannon

Are your dates flexible? Find out the best times to travel from Seattle to Shannon based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Shannon

  • What is the cheapest flight from Seattle to Shannon?

    In the last 3 days, the lowest price for a flight from Seattle to Shannon was $345 for a one-way ticket and $470 for a round-trip.

  • Do I need a passport to fly between Seattle and Shannon?

    Yes

  • Which airports will I be using when flying from Seattle to Shannon?

    On your way to Shannon, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing at Shannon.

  • Which aircraft models fly most regularly from Seattle to Shannon?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Shannon?

    oneworld, and Star Alliance are the airline alliances operating flights between Seattle and Shannon, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Seattle to Shannon, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to Shannon are United Airlines and American Airlines. With an average price for the route of $722 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $623 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Seattle to Shannon?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Shannon.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Shannon?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Shannon from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Shannon?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Shannon with an airline and back to Seattle with another airline. Booking your flights between Seattle and SNN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Shannon?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Shannon from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Seattle to Shannon

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Shannon. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Shannon? 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.
7.4
United AirlinesOverall score based on 9092 reviews
7.1Entertainment
6.6Food
7.7Boarding
8.1Crew
7.3Comfort
Airline reviews

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

10.0 ExcellentRoger, Dec 2025
CAE - ORD
Read more United Airlines reviews

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

United have really come back. Airport and boarding process is clear and good, app and information also very good

They charged a fee for 1st bag checked. Others in same party were free.

Flight was delayed 8 times. We were sitting at the airport for 14 hours. We got 2 hours of sleep (if that) on what was not meant to be a red-eye.

The movies offered were great. Staff were very pleasant and very efficient.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very bad! They kept delaying my flight and wouldn’t do anything about it

Gate was overcrowded. Gate agents performed very well. Flight crew was top notch! Efficient & professional & courteous. Both meals not thermalized well. Dinner main dish was actually cold in the center. Almost inedible. Breakfast sandwich was lukewarm.

The boarding was as always, the crew tried their best but not enough. The food was a disaster I had dietary restrictions that were half met because the company did not loaded the food for the flight. The entertainment screen was fine but content was not and also they removed the free messaging option from the flight and they charged 30 dollars for that crappy bandwidth. This flight is not worth the cost and the company is going down on quality.

Not comparable to Qatar Airways services on flights to Doha. Flight attendants provided basic services; I was never recognized by name or as an Executive Platinum member. Restrooms were not kept clean during the flight.

Awful. They won’t help me with anything. I booked on American but they abdicated to Iberia. The ticket was overpriced. Everything negative

it was fine, decent flight... dont get food besides cookies or pretzels so not sure why you ask about food. same for entertainment..

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

I got sick nothing contagious but distressing enough and the care I received on the flight was astounding.

Waaay too small plane. They also need to up the size of the overhead bins. I would love to keep me 3k with of camera equipment in my hard case baggahe instead of it being thrown into the belly of the plane

Attendants were pleasant and the flight was smooth and relaxed.

A little late at the start but all worked out well.

The folks and flights were fantastic. I unfortunately wasn’t able to order a meal that I could eat (I’m gluten free) because I got my ticket through kayak, but they tried their best to find something to help me get through the long flight and I’ll forever remember their kindness.

Flight takeoff was delayed an hour, but arrival time was not updated at the same time as departure time, so those picking me up at the other end were not alerted to the change in my arrival.

Seats are terribly cramped. I’m only 5’2” and my knees were practically in my face. No room to put a normal size bag under the seat and when the person in front of you reclined their seat your tray table was in your lap. This is the airline’s way of cramming more seats into the plane to make more money. I’ll think twice about taking Aer Lingus again since there are a few other options from Boston to the Emerald Isle.

Couldn’t check In online, message was couldn’t check in until Sunday morning though plane left Saturday night. Checked in okay at airport but caused slot if stress.

It all went very well, except for the ramp coordination upon landing in Boston. That, however, was resolved in fairly short order.

NOTE. Aer Lingus does not accept American Express. I was denied boarding because I could not pay the fee for my oversized bag. I did not have another credit or debit card. Moreover, at CDG, I needed to check my bag at one location, go to another location to check my oversized bag and a THIRD location to pay for my oversized bag. Hence, once I was denied boarding, my bags were already en route to the plane. To retrieve them I needed to go to a FOURTH location in another part of the terminal. Last, Aer Lingus will not reimburse me for any portion of my ticket. I lost $1000 bc Aer Lingus doesn’t accept American Express at the CDG counter even though I paid for my ticket through the Kayak link with Amex. Kayak should remedy this situation if they want to continue to partner with Aer Lingus.

The biking process was confusing and I was called for a seat assignment from I number I repeatedly though was spam, but the flight itself was great

It was poor overall. They cancelled our flight and changed it without notifying us. So we incurred extra costs by having to book a hotel for our layover. They say it's Kayak/Underpricer's responsibility to reimburse us. But Kayak/Underpricer have said it's Aer Lingus' responsibility because they are the ones with our 'booking information.' I find this situation confusing and unacceptable.

My experience with Aer Lingus was not too good. First, because of the last minute delayed flight from Amsterdam to Dublin we almost missed our flight from Dublin to Philadelphia. Secondly, the flight from Dublin to Philadelphia had very uncomfortable seats especially it was a very long flight. My buttocks were constantly in pain for sitting on these seats for this long. Lastly, the service in the plane was also slow. I asked for a second cup of water and the hostess told me he'll be right back with that where it took him over an hour to come back with water. It was warm in the plane and I was very thirsty. Overall this airline needs much improvement in their services.

Staff was generally friendly and helpful. Attendants collecting trash were somewhat inattentive though.

Everything you need to know for your flight from Seattle to Shannon

Information on your arrival and departure airports