SEA - SNN

$325 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 7/25. 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

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Everything you should know

Cheapest round-trip
$753
United Airlines
Mon 9/7Wed 9/16
SEA - SNN • 2 stops
Cheapest one-way
$374
United Airlines
Sat 7/25
SEA - SNN • 2 stops
Top airlines
United Airlines
Cheapest • from $753 (round-trip)
United Airlines
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
London (LHR)
Cheapest • Avg $694 (round-trip)
Chicago (ORD)
Shortest trip • 12h 35m (one-way)
Insights
Insights
Insights
Insights
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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

Mon, Sep 7 - Wed, Sep 16
United Airlines Logo
5:00 am - 7:30 am
SEA
-
SNN
18h 30m
2 stops
United Airlines Logo
9:30 am - 3:36 pm
SNN
-
SEA
14h 06m
1 stop
$753United Airlines
Mon, Sep 7 - Wed, Sep 16
United Airlines Logo
5:00 am - 7:30 am
SEA
-
SNN
18h 30m
2 stops
United Airlines Logo
9:30 am - 9:11 pm
SNN
-
SEA
19h 41m
2 stops
$758United Airlines
Fri, Sep 4 - Wed, Sep 16
United Airlines Logo
11:10 pm - 10:15 am
SEA
-
SNN
51h 05m
2 stops
United Airlines Logo
12:30 pm - 11:45 pm
SNN
-
SEA
19h 15m
1 stop
$769United Airlines
Wed, Aug 26 - Fri, Sep 4
United Airlines Logo
5:00 am - 7:30 am
SEA
-
SNN
18h 30m
2 stops
United Airlines Logo
9:30 am - 3:36 pm
SNN
-
SEA
14h 06m
1 stop
$770United Airlines
Tue, Aug 4 - Tue, Aug 25
United Airlines Logo
7:05 pm - 7:30 am
SEA
-
SNN
28h 25m
2 stops
United Airlines Logo
9:30 am - 10:42 pm
SNN
-
SEA
21h 12m
1 stop
$775United Airlines
Tue, Aug 4 - Tue, Aug 25
United Airlines Logo
10:40 pm - 7:30 am
SEA
-
SNN
24h 50m
1 stop
United Airlines Logo
9:30 am - 3:36 pm
SNN
-
SEA
14h 06m
1 stop
$776United Airlines
Mon, Aug 3 - Mon, Aug 24
United Airlines Logo
7:01 am - 7:30 am
SEA
-
SNN
16h 29m
1 stop
United Airlines Logo
9:30 am - 6:59 pm
SNN
-
SEA
17h 29m
1 stop
$820United Airlines
Mon, Aug 3 - Mon, Aug 24
United Airlines Logo
7:05 am - 10:15 am
SEA
-
SNN
19h 10m
2 stops
United Airlines Logo
9:30 am - 3:36 pm
SNN
-
SEA
14h 06m
1 stop
$825United Airlines
Wed, Sep 23 - Mon, Oct 5
United Airlines Logo
1:00 pm - 10:15 am
SEA
-
SNN
13h 15m
1 stop
United Airlines Logo
12:30 pm - 10:00 am
SNN
-
SEA
29h 30m
2 stops
$835United Airlines
Fri, Sep 4 - Wed, Sep 16
Delta Logo
9:55 pm - 11:10 am
SEA
-
SNN
29h 15m
1 stop
Delta Logo
1:05 pm - 10:16 pm
SNN
-
SEA
17h 11m
1 stop
$840Delta
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 72 hours.

In the past 3 days, the cheapest round-trip tickets from Seattle to Shannon were found on United Airlines ($753) and Delta ($840).

Find deals

Good to know

Cheapest flight$374
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 $325 for a one-way ticket and $753 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?

    Star Alliance, and oneworld are the airline alliances operating flights between Seattle and Shannon, with Star Alliance 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 $751 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 $597 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 9677 reviews
7.7Boarding
8.1Crew
7.3Comfort
7.1Entertainment
6.6Food
Airline reviews

Some crew were unfriendly or in some cases just straight up rude.

6.0 GoodAnonymous, Apr 2026
SFO - YVR
Read more United Airlines reviews

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

This flight was delayed but it worked in my favor because my Atlanta to Dallas flight was delayed.

This was a hard flight. 3 delays out of OKC (1 on the Tarmac). Delay in Atlanta coming to Dallas. total travel time was the equivalent of driving from OKC to Atlanta.

Like: flights are on time, good boarding process Can improve: planes are old, improve entertainment and make space more comfortable

Had to wait for a gate for a long time, then waited on the run way for a long time before leaving. The actual flights part was good.

The airplane was an old model, the overhead didn’t have enough room for people’s items and made boarding and boarding disappointing and stressful. Crew allowed passengers to bring more than the permitted baggage sizes.

Flying in the United States with the major airlines has become so underwhelming. A 2-3hr flight in most other parts of the world with the major carriers of the area comes with newer, CLEANER aircraft and significantly better in flight service in terms of both staff attitude and a actual meal service.

On time departure and early arrival. Flight attendant very nice.

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

Information on your arrival and departure airports

Seattle (SEA)
Shannon (SNN)