$624+ Cheap flights from Seattle (SEA) to Shannon (SNN)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SNN
Oct 11 — Oct 181
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Shannon with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Shannon
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Best
Last-minute
Cheapest flights from Seattle to ShannonExplore 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 September 11, 2026.
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 September 11, 2026.
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/2611:14 pm -
2 stops27h 01m
Tue 10/612:30 pm -
1 stop17h 25m
Deal found 9/11![United Airlines logo]()
$624
This Ovago deal was found by Cheapflights users on 9/8. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2211:55 pm -
1 stop21h 30m
Thu 10/297:50 am -
1 stop17h 00m
Deal found 9/8![Multiple Airlines logo]()
$792
This FlightHub deal was found by Cheapflights users on 9/8. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:30 pm -
1 stop14h 00m
Wed 11/187:50 am -
1 stop17h 00m
Deal found 9/8![Multiple Airlines logo]()
$793
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1010:43 am -
2 stops16h 47m
Wed 11/187:50 am -
1 stop17h 00m
Deal found 9/8![British Airways logo]()
$798
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:10 pm -
2 stops17h 25m
Mon 10/59:15 pm -
2 stops27h 55m
Deal found 9/9![Aer Lingus logo]()
$805
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:40 pm -
1 stop18h 50m
Thu 10/296:00 am -
1 stop19h 05m
Deal found 9/9![Multiple Airlines logo]()
$812
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:15 am -
2 stops21h 05m
Mon 10/59:15 pm -
1 stop22h 20m
Deal found 9/9![British Airways logo]()
$814
Best flights from Seattle to ShannonDiscover 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 September 11, 2026.
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 September 11, 2026.
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/2611:14 pm -
2 stops27h 01m
Tue 10/612:30 pm -
1 stop17h 25m
Deal found 9/11![United Airlines logo]()
$624
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:10 pm -
2 stops17h 25m
Mon 10/59:15 pm -
2 stops27h 55m
Deal found 9/9![Aer Lingus logo]()
$805
This Cheapflightsfares deal was found by Cheapflights users on 9/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1010:43 am -
2 stops16h 47m
Wed 11/187:50 am -
2 stops20h 30m
Deal found 9/8![British Airways logo]()
$807
This Ovago deal was found by Cheapflights users on 9/9. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/246:45 pm -
1 stop16h 40m
Sun 2/72:00 pm -
1 stop15h 56m
Deal found 9/9![Multiple Airlines logo]()
$876
This British Airways deal was found by Cheapflights users on 9/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/146:14 am -
2 stops26h 31m
Mon 12/218:05 pm -
2 stops35h 53m
Deal found 9/10![British Airways logo]()
$846
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/2410:31 am -
2 stops22h 14m
Sun 2/77:50 am -
1 stop17h 00m
Deal found 9/9![Aer Lingus logo]()
$865
This United Airlines deal was found by Cheapflights users on 9/7. 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.
Wed 10/711:14 pm -
2 stops27h 01m
Wed 10/1412:30 pm -
1 stop17h 25m
Deal found 9/7![United Airlines logo]()
$868
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Mon 9/285:05 pm -
2 stops33h 10m
Mon 10/512:30 pm -
3 stops33h 47m
Deal found 9/9![United Airlines logo]()
$889
Last-minute flights from Seattle to ShannonDiscover last-minute flight deals from Seattle to Shannon. Data last updated September 11, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Shannon. Data last updated September 11, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/11. 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 9/2611:14 pm -
2 stops27h 01m
Tue 10/612:30 pm -
1 stop17h 25m
Deal found 9/11![United Airlines logo]()
$624
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:10 pm -
2 stops17h 25m
Mon 10/59:15 pm -
2 stops27h 55m
Deal found 9/9![Aer Lingus logo]()
$805
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:15 am -
2 stops21h 05m
Mon 10/59:15 pm -
1 stop22h 20m
Deal found 9/9![British Airways logo]()
$814
This American Airlines deal was found by Cheapflights users on 9/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/282:19 pm -
2 stops17h 51m
Mon 10/59:15 pm -
1 stop22h 20m
Deal found 9/9![American Airlines logo]()
$836
This Expedia deal was found by Cheapflights users on 9/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/61:30 pm -
1 stop18h 40m
Thu 10/159:15 pm -
1 stop22h 20m
Deal found 9/10![British Airways logo]()
$824
This Ovago deal was found by Cheapflights users on 9/8. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2211:55 pm -
1 stop21h 30m
Thu 10/297:50 am -
1 stop17h 00m
Deal found 9/8![Multiple Airlines logo]()
$792
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:40 pm -
1 stop18h 50m
Thu 10/296:00 am -
1 stop19h 05m
Deal found 9/9![Multiple Airlines logo]()
$812
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 September 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $624 (United Airlines) |
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 7,457,451 searches. Data last updated September 11, 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
Cheapest round-trip
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Sat 9/26
11:14 pm-10:15 am
2 stops27h 01m
Shannon
Tue 10/6
12:30 pm-9:55 pm
1 stop17h 25m
$624
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Mon 9/28
7:10 pm-8:35 pm
2 stops17h 25m
Shannon
Mon 10/5
9:15 pm-5:10 pm
2 stops27h 55m
$805
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Tue 11/10
10:43 am-11:30 am
2 stops16h 47m
Shannon
Wed 11/18
7:50 am-8:20 pm
2 stops20h 30m
$807
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Mon 12/14
6:14 am-4:45 pm
2 stops26h 31m
Shannon
Mon 12/21
8:05 pm-11:58 pm
2 stops35h 53m
$846
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Sun 1/24
10:31 am-4:45 pm
2 stops22h 14m
Shannon
Sun 2/7
7:50 am-4:50 pm
1 stop17h 00m
$865
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Wed 10/7
11:14 pm-10:15 am
2 stops27h 01m
Shannon
Wed 10/14
12:30 pm-9:55 pm
1 stop17h 25m
$868
Quickest round-trip
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Sun 1/24
6:45 pm-7:25 pm
1 stop16h 40m
Shannon
Sun 2/7
2:00 pm-9:56 pm
1 stop15h 56m
$876
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Mon 9/28
5:05 pm-10:15 am
2 stops33h 10m
Shannon
Mon 10/5
12:30 pm-2:17 pm
3 stops33h 47m
$889
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
SEA-SNN
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 September 11, 2026.
Read through reviews of airlines operating flights from Seattle to Shannon, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.4
Boarding
7.7
Crew
8.1
Food
6.7
Entertainment
7.1
Comfort
7.3
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Overall
7.4
Boarding
7.7
Crew
8.1
Food
6.7
Entertainment
7.1
Comfort
7.3
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
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.
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Complete your trip
Complete your trip to Shannon by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Shannon by cabin class
Find flights from Seattle to Shannon, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Shannon flights
Browse other Seattle and Shannon flight options. Last updated on September 11, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on September 11, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Shannon
Explore flights to Shannon departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 11, 2026.
Top airline flying from Seattle to Shannon
Discover the top airline 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 7,457,451 searches. Data last updated September 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$592 | Average$1,100 | FlexibilityNo cancel fee | On-time69% |