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Shannon

$319+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SNN
Sep 1 — Sep 81
Tue 9/1
Tue 9/8
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 August 2, 2026.

This United Airlines deal was found by Cheapflights users on 7/30. 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 8/3111:04 pm
SEA
-
SNN
2 stops27h 11m
United Airlines
Tue 9/159:30 am
SNN
-
SEA
1 stop14h 37m
United Airlines
Deal found 7/30$807
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/157:00 am
SEA
-
SNN
1 stop16h 30m
United Airlines
Tue 9/229:30 am
SNN
-
SEA
1 stop14h 37m
United Airlines
Deal found 8/1$830
This United Airlines deal was found by Cheapflights users on 7/30. 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 9/108:40 am
SEA
-
SNN
2 stops17h 35m
United Airlines
Thu 9/179:30 am
SNN
-
SEA
1 stop17h 44m
United Airlines
Deal found 7/30$863
This United Airlines deal was found by Cheapflights users on 7/28. 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 9/117:00 am
SEA
-
SNN
1 stop16h 30m
United Airlines
Fri 9/189:30 am
SNN
-
SEA
2 stops20h 06m
United Airlines
Deal found 7/28$872
This KLM deal was found by Cheapflights users on 7/31. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/306:09 pm
SEA
-
SNN
2 stops33h 01m
KLM
Sun 9/61:05 pm
SNN
-
SEA
1 stop29h 08m
KLM
Deal found 7/31$878
This United Airlines deal was found by Cheapflights users on 8/1. 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 8/307:00 am
SEA
-
SNN
1 stop16h 30m
United Airlines
Sun 9/69:30 am
SNN
-
SEA
1 stop14h 37m
United Airlines
Deal found 8/1$880
This United Airlines deal was found by Cheapflights users on 7/30. 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 8/2710:41 am
SEA
-
SNN
2 stops15h 34m
United Airlines
Thu 9/39:30 am
SNN
-
SEA
2 stops16h 12m
United Airlines
Deal found 7/30$882

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 August 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$807
(United Airlines)

One-way from

$319
(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 August 2, 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

Mon 8/31

11:04 pm-10:15 am

2 stops27h 11m

Shannon

Tue 9/15

9:30 am-4:07 pm

1 stop14h 37m

$807
Quickest round-trip

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 9/15

7:00 am-7:30 am

1 stop16h 30m

Shannon

Tue 9/22

9:30 am-4:07 pm

1 stop14h 37m

$830

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Thu 9/10

8:40 am-10:15 am

2 stops17h 35m

Shannon

Thu 9/17

9:30 am-7:14 pm

1 stop17h 44m

$868

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Thu 8/27

1:00 pm-10:15 am

1 stop13h 15m

Shannon

Thu 9/3

9:30 am-9:15 pm

2 stops19h 45m

$882

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Sun 8/30

5:00 am-7:30 am

2 stops18h 30m

Shannon

Sun 9/6

9:30 am-11:04 pm

2 stops21h 34m

$884

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-12:23 pm

2 stops31h 53m

$884

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Mon 9/14

8:40 am-10:15 am

2 stops17h 35m

Shannon

Mon 9/21

9:30 am-4:07 pm

1 stop14h 37m

$890
Cheapest one-way

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Fri 1/1

2:35 pm-10:45 am

3 stops36h 10m

$439
Quickest one-way

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Mon 9/14

10:42 am-7:30 am

1 stop12h 48m

$463

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Sun 9/13

6:32 am-7:30 am

2 stops16h 58m

$463

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 13 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 August.
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 August 2, 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
10,061 reviews

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
United Airlines
7.4
Good
10,061 reviews
United Airlines
7.4
Good
10,061 reviews

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
American Airlines
7.1
Good
11,846 reviews
United Airlines
7.4
Good
10,061 reviews

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.

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 27h 11m. 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 $592.

  • 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

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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 August 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$468Average$549FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$592Average$1,100FlexibilityNo cancel feeOn-time69%

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