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Shannon

$390+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SNN
Jan 7 — Jan 141
Wed 1/7
Wed 1/14
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 December 8, 2025.

This KAYAK deal was found by Cheapflights users on 12/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/241:19 pmSEA - SNN
2 stops38h 11mBritish Airways
Wed 12/317:50 amSNN - SEA
2 stops34h 12mBritish Airways
Deal found 12/8$1,777

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 December 8, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$470
(American Airlines)

One-way from

$390
(American Airlines)
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
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One-way flight from Seattle/Tacoma Intl to Shannon
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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 December 8, 2025.
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

Wed 3/4

6:50 pm-4:45 pm

1 stop13h 55m

Shannon

Thu 3/12

7:50 am-5:55 pm

1 stop17h 05m

$470

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Sun 3/1

7:15 am-11:30 am

2 stops20h 15m

Shannon

Tue 3/10

7:50 am-9:54 pm

2 stops21h 04m

$484

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 4/14

8:20 pm-8:35 pm

1 stop16h 15m

Shannon

Sat 4/25

7:40 am-9:46 pm

2 stops22h 06m

$530

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 3/3

1:25 pm-11:30 am

1 stop14h 05m

Shannon

Thu 3/12

7:50 am-5:55 pm

1 stop17h 05m

$650

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 3/3

6:50 pm-7:25 pm

1 stop16h 35m

Shannon

Fri 3/13

7:50 am-5:55 pm

1 stop17h 05m

$650

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Mon 3/2

10:05 am-4:45 pm

2 stops22h 40m

Shannon

Tue 3/10

5:30 pm-10:06 pm

2 stops35h 36m

$670

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Sun 3/1

3:40 pm-4:45 pm

2 stops17h 05m

Shannon

Tue 3/10

7:50 am-9:31 am

3 stops32h 41m

$670

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Wed 3/4

3:40 pm-4:45 pm

2 stops17h 05m

Shannon

Thu 3/12

7:50 am-9:31 am

3 stops32h 41m

$670

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Wed 3/4

10:05 am-4:45 pm

2 stops22h 40m

Shannon

Fri 3/13

7:50 am-3:01 pm

2 stops38h 11m

$670

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Mon 3/2

3:40 pm-11:30 am

2 stops35h 50m

Shannon

Thu 3/12

7:50 am-3:01 pm

2 stops38h 11m

$670

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

Showing 1-10 of 14 results
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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Shannon, Clare flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

What is the cheapest time of day to fly from SEA to SNN?

Find hourly flight availability from Seattle to Shannon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 8, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 11% on flights from Seattle to Shannon, Clare by exploring options for tickets in the afternoon.

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 December 8, 2025.
Read through reviews of airlines operating flights from Seattle to Shannon, such as United Airlines, American Airlines, and Aer Lingus. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,089 reviews

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,089 reviews
United Airlines
7.4
Good
9,089 reviews

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
American Airlines
7.2
Good
11,043 reviews
United Airlines
7.4
Good
9,089 reviews

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Aer Lingus
7.2
Good
1,389 reviews
United Airlines
7.4
Good
9,089 reviews

Boarding

7.7

Crew

8.1

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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?

    American Airlines and British Airways can get you from Seattle to Shannon, Clare in just under 13h 55m. Your travel time can differ by up to 10m. Seattle and Shannon, Clare are separated by a distance of 4485 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Currently priced at $488, 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. Search Cheapflights for deals from United Airlines and Aer Lingus - these airlines can fly you to your destination from $593 and $759, respectively.

  • 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 3 airlines flying from Seattle to Shannon

Discover the top 3 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 December 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$488Average$623FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$593Average$722FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$759Average$815FlexibilityNo cancel feeOn-timeN/A

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