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Shannon

$389+ 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
Dec 24 — Dec 311
Wed 12/24
Wed 12/31
1 adult, Economy
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Cheap 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 November 24, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$468
(American Airlines)

One-way from

$389
(United Airlines)

Popular in

June

Cheapest in

July
Provider with most accurate pricing for Seattle/Tacoma Intl-Shannon flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Shannon flights.
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From Seattle/Tacoma Intl to Shannon
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One-way flight from Seattle/Tacoma Intl to Shannon
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Highest demand for flights based on searches. 5% potential increase in price ($42 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($39 potential savings vs. average RT price).
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Find flight deals from Seattle to Shannon

Best flights from Seattle to Shannon
Discover carefully curated flight deals from Seattle to Shannon that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 24, 2025.

This American Airlines deal was found by Cheapflights users on 11/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/156:50 pmSEA - SNN
1 stop13h 55mAmerican Airlines
Thu 1/227:50 amSNN - SEA
1 stop17h 05mAmerican Airlines
Deal found 11/23$468
This United Airlines deal was found by Cheapflights users on 11/22. 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 4/42:16 pmSEA - SNN
2 stops35h 59mUnited Airlines
Sat 4/2512:30 pmSNN - SEA
2 stops18h 44mUnited Airlines
Deal found 11/22$547
This Mytrip deal was found by Cheapflights users on 11/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/810:00 amSEA - SNN
2 stops17h 15mMultiple Airlines
Sat 5/2312:00 pmSNN - SEA
2 stops40h 10mMultiple Airlines
Deal found 11/21$623
This FlightHub deal was found by Cheapflights users on 11/21. 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.
Fri 5/82:10 pmSEA - SNN
1 stop13h 05mLufthansa
Sat 5/2312:00 pmSNN - SEA
1 stop32h 20mLufthansa
Deal found 11/21$635
This American Airlines deal was found by Cheapflights users on 11/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/26:50 pmSEA - SNN
1 stop13h 55mAmerican Airlines
Tue 2/107:50 amSNN - SEA
1 stop17h 05mAmerican Airlines
Deal found 11/23$468
This American Airlines deal was found by Cheapflights users on 11/23. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/141:33 pmSEA - SNN
2 stops18h 37mAmerican Airlines
Sat 4/257:40 amSNN - SEA
2 stops23h 25mAmerican Airlines
Deal found 11/23$533

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 November 24, 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

Thu 1/15

6:50 pm-4:45 pm

1 stop13h 55m

Shannon

Thu 1/22

7:50 am-4:55 pm

1 stop17h 05m

$468

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Mon 2/2

6:50 pm-4:45 pm

1 stop13h 55m

Shannon

Tue 2/10

7:50 am-4:55 pm

1 stop17h 05m

$468

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 4/14

1:33 pm-4:10 pm

2 stops18h 37m

Shannon

Sat 4/25

7:40 am-11:05 pm

2 stops23h 25m

$533

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Sat 4/4

2:16 pm-10:15 am

2 stops35h 59m

Shannon

Sat 4/25

12:30 pm-11:14 pm

2 stops18h 44m

$547

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Fri 5/8

10:00 am-11:15 am

2 stops17h 15m

Shannon

Sat 5/23

12:00 pm-8:10 pm

2 stops40h 10m

$623

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Fri 5/8

2:10 pm-11:15 am

1 stop13h 05m

Shannon

Sat 5/23

12:00 pm-12:20 pm

1 stop32h 20m

$635

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 4/21

12:25 pm-10:15 am

1 stop13h 50m

$389

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Sun 1/11

6:50 pm-4:45 pm

1 stop13h 55m

$390

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Sun 1/11

5:50 am-10:50 pm

3 stops33h 00m

$432

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Wed 1/14

5:50 am-11:30 am

2 stops45h 40m

$475

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/22

Showing 1-10 of 12 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 November.
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, February is the cheapest month in which you can book a flight from Seattle to Shannon, Clare (average of $492). Flying from Seattle to Shannon, Clare in June is currently the most expensive (average of $864). 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 November 24, 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.

What is the cheapest day to fly from Seattle to Shannon, Clare?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Shannon. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Shannon, Clare flight should consider departing on Tuesday at noon when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 24, 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
9,041 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,041 reviews
United Airlines
7.4
Good
9,041 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
American Airlines
7.2
Good
11,040 reviews
United Airlines
7.4
Good
9,041 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Aer Lingus
7.2
Good
1,380 reviews
United Airlines
7.4
Good
9,041 reviews

Boarding

7.7

Entertainment

7.1

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 can get you from Seattle to Shannon, Clare in just under 13h 55m. 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 $520, 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 $715, respectively. American Airlines is currently priced 34% below the average price you’ll pay for this route.

  • 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, February is the cheapest month in which you can book a flight from Seattle to Shannon, Clare (average of $492). Flying from Seattle to Shannon, Clare in June is currently the most expensive (average of $864). 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
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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 November 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$520Average$623FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$593Average$757FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$715Average$797FlexibilityNo cancel feeOn-timeN/A

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