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Shannon

$266+ 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 5/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SNN
Mar 21 — Mar 281
Sat 3/21
Sat 3/28
1 adult, Economy
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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 February 19, 2026.

This United Airlines deal was found by Cheapflights users on 2/19. 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.
Tue 4/77:00 am
SEA
-
SNN
2 stops19h 15m
United Airlines
Wed 4/2912:30 pm
SNN
-
SEA
2 stops16h 36m
United Airlines
Deal found 2/19$523
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Tue 4/145:00 am
SEA
-
SNN
2 stops21h 15m
United Airlines
Sat 4/2512:30 pm
SNN
-
SEA
2 stops18h 57m
United Airlines
Deal found 2/19$543
This United Airlines deal was found by Cheapflights users on 2/16. 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.
Sat 8/155:00 am
SEA
-
SNN
2 stops21h 15m
United Airlines
Sat 8/2212:30 pm
SNN
-
SEA
2 stops18h 29m
United Airlines
Deal found 2/16$593
This United Airlines deal was found by Cheapflights users on 2/17. 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.
Sat 4/117:00 am
SEA
-
SNN
2 stops19h 15m
United Airlines
Sat 4/1812:30 pm
SNN
-
SEA
2 stops38h 30m
United Airlines
Deal found 2/17$605
This United Airlines deal was found by Cheapflights users on 2/15. 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.
Fri 10/26:30 am
SEA
-
SNN
2 stops19h 45m
United Airlines
Wed 10/712:30 pm
SNN
-
SEA
1 stop15h 06m
United Airlines
Deal found 2/15$608
This FlightHub deal was found by Cheapflights users on 2/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/148:00 am
SEA
-
SNN
2 stops28h 35m
Multiple Airlines
Sat 4/2512:00 pm
SNN
-
SEA
1 stop32h 20m
Multiple Airlines
Deal found 2/17$633
This oojo deal was found by Cheapflights users on 2/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/177:50 pm
SEA
-
SNN
1 stop32h 40m
British Airways
Tue 3/248:05 pm
SNN
-
SEA
2 stops30h 15m
British Airways
Deal found 2/16$646
This United Airlines deal was found by Cheapflights users on 2/17. 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 7/1610:52 am
SEA
-
SNN
1 stop12h 38m
United Airlines
Tue 7/289:30 am
SNN
-
SEA
1 stop22h 29m
United Airlines
Deal found 2/17$649
This oojo deal was found by Cheapflights users on 2/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/189:05 pm
SEA
-
SNN
2 stops15h 20m
Aer Lingus
Wed 3/257:50 am
SNN
-
SEA
2 stops18h 30m
Aer Lingus
Deal found 2/18$657

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 February 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$523
(United Airlines)

One-way from

$266
(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 February 19, 2026.
Use the filters below to find and compare flights from Seattle to Shannon that are best for you.

Fly from

Seattle

Fly to

Shannon

Route

Depart

Return

Price

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 4/7

7:00 am-10:15 am

2 stops19h 15m

Shannon

Wed 4/29

12:30 pm-9:06 pm

2 stops16h 36m

$523

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 4/14

12:08 pm-10:15 am

1 stop14h 07m

Shannon

Sat 4/25

12:30 pm-11:27 pm

2 stops18h 57m

$543

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Sat 4/11

7:00 am-10:15 am

2 stops19h 15m

Shannon

Sat 4/18

12:30 pm-7:00 pm

2 stops38h 30m

$605

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 3/17

7:50 pm-11:30 am

1 stop32h 40m

Shannon

Tue 3/24

8:05 pm-7:20 pm

2 stops30h 15m

$646

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Wed 3/18

9:05 pm-7:25 pm

2 stops15h 20m

Shannon

Wed 3/25

7:50 am-7:20 pm

2 stops18h 30m

$657

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 3/3

2:35 pm-9:30 pm

2 stops22h 55m

Shannon

Tue 3/10

7:50 am-6:00 pm

2 stops17h 10m

$689

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 3/17

2:25 pm-11:30 am

1 stop14h 05m

Shannon

Tue 3/24

2:45 pm-10:40 am

1 stop26h 55m

$692

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Mon 5/18

7:00 pm-11:35 pm

2 stops44h 35m

$266

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Mon 5/18

11:55 am-10:15 am

1 stop14h 20m

$464

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/17

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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.

Cheapflights Insights

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

What is the cheapest month to book a flight from Seattle to Shannon, Clare?

Currently, November is the cheapest month in which you can book a flight from Seattle to Shannon, Clare (average of $526). Flying from Seattle to Shannon, Clare in June is currently the most expensive (average of $1,105). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 February 19, 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
9,325 reviews

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,325 reviews
United Airlines
7.4
Good
9,325 reviews

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
American Airlines
7.2
Good
11,320 reviews
United Airlines
7.4
Good
9,325 reviews

Overall

7.4

Entertainment

7.1

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.6

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 19h 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 $469, 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 $593.

  • 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.

  • What is the cheapest month to book a flight from Seattle to Shannon, Clare?

    Currently, November is the cheapest month in which you can book a flight from Seattle to Shannon, Clare (average of $526). Flying from Seattle to Shannon, Clare in June is currently the most expensive (average of $1,105). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Shannon?

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

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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 February 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$469Average$621FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$593Average$751FlexibilityNo cancel feeOn-time69%

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