SEA - SNN

$300 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 10/8. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$786
United Airlines
Fri 10/2Wed 10/7
SEA - SNN • 2 stops
Cheapest one-way
$300
Multiple Airlines
Thu 10/8
SEA - SNN • 3 stops
Top airlines
Cheapest • from $786 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Shannon. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $703 (round-trip)
Shortest trip • 12h 35m (one-way)
Insights
Insights
Insights
Insights
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

Fri, Oct 2 - Wed, Oct 7
United Airlines Logo
11:13 pm - 10:15 am
SEA
-
SNN
51h 02m
2 stops
United Airlines Logo
12:30 pm - 12:48 pm
SNN
-
SEA
32h 18m
2 stops
$786United Airlines
Mon, Aug 3 - Wed, Aug 19
KLM Logo
10:40 pm - 11:10 am
SEA
-
SNN
28h 30m
1 stop
KLM Logo
1:05 pm - 11:20 pm
SNN
-
SEA
18h 15m
1 stop
$804KLM
Mon, Aug 3 - Wed, Aug 19
United Airlines Logo
10:52 am - 7:30 am
SEA
-
SNN
12h 38m
1 stop
United Airlines Logo
9:30 am - 11:26 pm
SNN
-
SEA
21h 56m
3 stops
$805United Airlines
Tue, Aug 4 - Tue, Aug 25
Air France Logo
7:15 am - 11:10 am
SEA
-
SNN
19h 55m
1 stop
Air France Logo
1:05 pm - 11:20 pm
SNN
-
SEA
18h 15m
1 stop
$813Air France
Wed, Aug 12 - Thu, Aug 27
United Airlines Logo
10:41 am - 7:30 am
SEA
-
SNN
12h 49m
1 stop
United Airlines Logo
9:30 am - 9:15 pm
SNN
-
SEA
19h 45m
2 stops
$818United Airlines
Fri, Oct 2 - Wed, Oct 7
United Airlines Logo
7:00 am - 10:15 am
SEA
-
SNN
19h 15m
1 stop
United Airlines Logo
12:30 pm - 9:55 pm
SNN
-
SEA
17h 25m
1 stop
$820United Airlines
Tue, Aug 4 - Tue, Aug 25
Delta Logo
10:40 pm - 11:10 am
SEA
-
SNN
28h 30m
1 stop
Delta Logo
1:05 pm - 8:20 pm
SNN
-
SEA
15h 15m
1 stop
$821Delta
Fri, Aug 14 - Fri, Aug 28
Delta Logo
11:59 pm - 11:10 am
SEA
-
SNN
51h 11m
2 stops
Delta Logo
1:05 pm - 10:05 pm
SNN
-
SEA
17h 00m
2 stops
$830Delta
Tue, Jul 14 - Tue, Jul 28
United Airlines Logo
8:56 am - 10:15 am
SEA
-
SNN
17h 19m
2 stops
United Airlines Logo
9:30 am - 10:56 pm
SNN
-
SEA
21h 26m
1 stop
$847United Airlines
Wed, Jul 15 - Wed, Jul 29
United Airlines Logo
10:52 am - 7:30 am
SEA
-
SNN
12h 38m
1 stop
United Airlines Logo
9:30 am - 11:10 pm
SNN
-
SEA
21h 40m
2 stops
$852United Airlines
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 provide the cheapest flights from Seattle to Shannon?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Seattle to Shannon were found on United Airlines ($786) and KLM ($804).

Good to know

Cheapest flight$300
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 5 days, the lowest price for a flight from Seattle to Shannon was $300 for a one-way ticket and $786 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 $867 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 $549 and an overall rating of 7.1.

  • 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 airlines flying 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 9859 reviews
8.1Crew
7.1Entertainment
7.3Comfort
6.6Food
7.7Boarding
Airline reviews

Very easy ! Use the kiosk and bag drop and right to security within 10 min

10.0 ExcellentJoanne, Jun 2026
DEN - ORD
Read more United Airlines reviews

Very easy ! Use the kiosk and bag drop and right to security within 10 min

Checking bag at terminal was horrible. No agents to check us in and only 1 kiosk working. Boarding went ok. Crew onboard was very scattered rained. Missed our row while serving and then didn’t see them hardly again.

Crew was amazing, takeoff wonderful. The bathroom was disgusting from before takeoff the odor made the flight uncomfortable as you could smell the bathroom from the center of the plane where we were sitting. Smelled like raw sewage. My daughter was throwing up as we landed due to the smell and horrible turbulence as we approached Newark.

Airline tickets are not cheap. You expect reliable competent service. Thanks to canceled flights and botched transfers we arrived at our destination two days late. This is not acceptable

Horrible! Several delays and then was cancelled! I spent over 24 hours in the airport and was unable to get a hotel or food voucher.

The entertainment they offer could use some games, and maybe they could add some cookies to the snack menu. And the automated messages are a bit repetitive. But it was comfortable temperature wise and the seats were comfortable. The crew is very polite and helpful

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

This planes staff was top tier. Everything went great and had a great flight home.

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

This was an overnight flight, and in the morning they did know coffee service. How you can throw passengers in a San Francisco airport at 5:40 a.m. in the morning and not giving them Coffee is a crime.

Significant delays on my trip to Chicago and my trip back to NY

Terrible boarding and first class experience. Nice staff but overall disorganized, dirty plane.

Delayed by 5 hours and I had to wit in the airport for more than 6+ hours.

weather delay of almost 2 hours then we landed and our gate wasn't available so we waited another 30 min

Flight had mechanical issues and it was delayed 30 mins - some of us boarded and then had to deplane.

technology worked well and everything ran smoothly. The seats are quite cramped so please don't try to re-engineer the cabin to squeeze more bodies on board.

Delayed flight more than I hour. When boarding we spent some additional time on the plane before takeoff ....

Flight was delayed due to connecting passengers. Lack of snack options bad. Sitting in Aisle, last cart run pulled the cart directly into my knee. Rude awakening.

We sat on plane at gate delayed without communication as to why we were just sitting there

Agency very bad had to cancelled my booking too many changes in the flight changed my flight to 1 week

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

Information on your arrival and departure airports