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Shannon

$250+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SNN
Sep 9 — Sep 161
Wed 9/9
Wed 9/16
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 10, 2026.

This KLM deal was found by Cheapflights users on 8/7. 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.
Sat 9/510:40 pm -
1 stop28h 30m
Fri 9/181:05 pm -
1 stop15h 16m
Deal found 8/7$804
This United Airlines deal was found by Cheapflights users on 8/7. 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 9/511:59 pm -
2 stops26h 16m
Fri 9/189:30 am -
1 stop14h 37m
Deal found 8/7$817
This Mytrip deal was found by Cheapflights users on 8/9. 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.
Thu 10/157:00 pm -
2 stops17h 50m
Thu 10/295:30 pm -
2 stops31h 30m
Deal found 8/9$960
This United Airlines deal was found by Cheapflights users on 8/7. 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 8/301:00 pm -
1 stop13h 15m
Sun 9/69:30 am -
1 stop21h 13m
Deal found 8/7$973
This United Airlines deal was found by Cheapflights users on 8/9. 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 9/238:40 am -
2 stops17h 35m
Wed 9/3012:30 pm -
1 stop17h 25m
Deal found 8/9$978
This Air Canada deal was found by Cheapflights users on 8/7. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/148:15 am -
2 stops24h 30m
Mon 12/218:05 pm -
2 stops32h 54m
Deal found 8/7$981

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 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$804
(KLM)

One-way from

$250
(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
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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 August 10, 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 Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sat 9/5

11:00 pm-10:15 am

2 stops27h 15m

Shannon

Fri 9/18

9:30 am-4:07 pm

1 stop14h 37m

$804

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sat 9/5

10:40 pm-11:10 am

1 stop28h 30m

Shannon

Fri 9/18

1:05 pm-11:59 pm

2 stops18h 54m

$804
Quickest round-trip

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sun 8/30

7:00 am-10:15 am

1 stop19h 15m

Shannon

Sun 9/6

9:30 am-7:07 pm

1 stop17h 37m

$973
Cheapest one-way

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Mon 11/9

8:18 am-4:45 pm

3 stops24h 27m

$296
Quickest one-way

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Tue 11/10

6:45 pm-4:45 pm

1 stop14h 00m

$439

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Mon 11/9

6:45 pm-4:45 pm

1 stop14h 00m

$443

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sun 11/8

6:45 pm-11:30 am

1 stop32h 45m

$448

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Fri 10/9

6:43 pm-10:15 am

3 stops55h 32m

$496

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sat 11/7

6:45 pm-11:30 am

1 stop32h 45m

$498

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Thu 11/12

6:45 pm-11:30 am

1 stop32h 45m

$498

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/8

Sorted by cheapest first

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 10, 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
10,095 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
United Airlines
7.4
Good
10,095 reviews
United Airlines
7.4
Good
10,095 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
American Airlines
7.1
Good
11,897 reviews
United Airlines
7.4
Good
10,095 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Entertainment

7.1

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible

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 and KLM can get you from Seattle to Shannon, Clare in just under 27h 15m. Your travel time can differ by up to 1h 15m. 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 $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

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Alternative routes for Seattle to Shannon

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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 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$468Average$549FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$592Average$1,100FlexibilityNo cancel feeOn-time69%

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