HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Shannon

$356+ Cheap flights from Seattle (SEA) to Shannon (SNN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SNN
Aug 27 — Sep 31
Thu 8/27
Thu 9/3
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Shannon with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Seattle to Shannon

Cheapest flights from Seattle to Shannon
Explore the most affordable flight options available from Seattle to Shannon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2026.

This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/235:00 am
SEA
-
SNN
2 stops21h 15m
United Airlines
Tue 9/812:30 pm
SNN
-
SEA
1 stop19h 06m
United Airlines
Deal found 7/25$807
This United Airlines deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/910:42 am
SEA
-
SNN
1 stop12h 48m
United Airlines
Wed 9/1612:30 pm
SNN
-
SEA
1 stop19h 06m
United Airlines
Deal found 7/25$818
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/75:00 am
SEA
-
SNN
2 stops18h 30m
United Airlines
Mon 9/149:30 am
SNN
-
SEA
1 stop14h 37m
United Airlines
Deal found 7/27$868
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:59 pm
SEA
-
SNN
2 stops26h 16m
United Airlines
Tue 10/612:30 pm
SNN
-
SEA
2 stops31h 53m
United Airlines
Deal found 7/27$889
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/139:40 pm
SEA
-
SNN
1 stop29h 45m
Multiple Airlines
Mon 9/2112:40 pm
SNN
-
SEA
2 stops40h 00m
Multiple Airlines
Deal found 7/27$893
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/137:30 am
SEA
-
SNN
1 stop18h 45m
United Airlines
Sun 9/209:30 am
SNN
-
SEA
1 stop14h 40m
United Airlines
Deal found 7/27$895
This United deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1211:59 pm
SEA
-
SNN
2 stops26h 16m
Multiple Airlines
Sat 9/1912:00 pm
SNN
-
SEA
2 stops42h 47m
Multiple Airlines
Deal found 7/27$898
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:00 am
SEA
-
SNN
2 stops18h 30m
United Airlines
Mon 9/219:30 am
SNN
-
SEA
2 stops19h 45m
United Airlines
Deal found 7/27$899
This Delta deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1210:40 pm
SEA
-
SNN
1 stop28h 30m
Delta
Sun 9/201:05 pm
SNN
-
SEA
1 stop18h 15m
Delta
Deal found 7/27$903

Find flight deals from Seattle to Shannon

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Shannon (SNN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$807
(United Airlines)

One-way from

$356
(Kiwi.com)
Provider with most accurate pricing for Seattle/Tacoma Intl-Shannon flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Shannon flights.
Search Deals
From Seattle/Tacoma Intl to Shannon
Search Deals
One-way flight from Seattle/Tacoma Intl to Shannon
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Shannon that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2026.
Use the filters below to find and compare flights from Seattle to Shannon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Sun 8/23

5:00 am-10:15 am

2 stops21h 15m

Shannon

Tue 9/8

9:30 am-5:52 pm

2 stops16h 22m

$807

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Wed 9/9

8:40 am-7:30 am

2 stops14h 50m

Shannon

Wed 9/16

9:30 am-11:26 pm

3 stops21h 56m

$822
Quickest round-trip

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Mon 9/7

5:00 am-7:30 am

2 stops18h 30m

Shannon

Mon 9/14

9:30 am-4:07 pm

1 stop14h 37m

$868

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Thu 9/10

7:11 am-7:30 am

2 stops16h 19m

Shannon

Thu 9/17

9:30 am-9:15 pm

2 stops19h 45m

$872

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Thu 10/1

11:59 pm-10:15 am

2 stops26h 16m

Shannon

Tue 10/6

12:30 pm-9:55 pm

1 stop17h 25m

$889
Cheapest one-way

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Wed 9/23

7:00 pm-7:55 am

2 stops52h 55m

$356

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Wed 9/16

7:00 pm-4:35 pm

2 stops37h 35m

$357
Quickest one-way

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Wed 9/16

1:00 pm-10:15 am

1 stop13h 15m

$463

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Wed 9/23

7:30 am-10:15 am

1 stop18h 45m

$463

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 8/18

7:10 pm-8:35 pm

2 stops17h 25m

$479

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

Compare providers for flights from Seattle to Shannon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Shannon in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Shannon, Clare flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Shannon, Clare flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Shannon, Clare flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Shannon, Clare flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Shannon, Clare flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Shannon

Have a flexible travel schedule? Discover the best time to fly to Shannon from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Shannon

Get insights into the airlines that provide service to Shannon. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Shannon. Reviews last updated July 28, 2026.
Read through reviews of airlines operating flights from Seattle to Shannon, such as United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,046 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
United Airlines
7.4
Good
10,046 reviews
United Airlines
7.4
Good
10,046 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this
American Airlines
7.1
Good
11,839 reviews
United Airlines
7.4
Good
10,046 reviews

Boarding

7.7

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.1

Food

6.6

Reviews

1 / 20
6.0
Good

ROHIT,Jun 2026

IND - EWR

It should not be delayed by 2 hours. I missed the important event due to this

Related info for your journey

Find useful and relevant information for your journey from Seattle to Shannon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Shannon, Clare?

    United Airlines can get you from Seattle to Shannon, Clare in just under 21h 15m. Your travel time can differ by up to . Seattle and Shannon, Clare are separated by a distance of 4485 mi.

  • What are the cheapest airlines flying from Seattle to Shannon, Clare round-trip?

    Currently priced at $468, American Airlines will fly you from Seattle to Shannon, Clare and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as $586.

  • Can I find deals for flights from Seattle to Shannon that include hotel bookings?

    Yes. In addition to deals on Seattle to Shannon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Shannon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Shannon.

  • Can I find deals for business class flights from Seattle to Shannon?

    Yes. Cheapflights offers flight deals from Seattle to Shannon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Shannon?

Book flights to Shannon if you plan to visit one of these locations
Ennis

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Shannon

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Dublin flights
Portland to Dublin flights
Seattle to Cork flights
Spokane to Dublin flights

Top 2 airlines flying from Seattle to Shannon

Discover the top 2 airlines that operate flights from Seattle to Shannon. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$468Average$549FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$586Average$1,100FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.