$316+ 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 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SNN
Oct 29 — Nov 51
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Cheapest
Best
Last-minute
One-way
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 29, 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 29, 2026.
This United Airlines deal was found by Cheapflights users on 9/29. 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 9/307:00 am -
1 stop19h 15m
Wed 10/712:30 pm -
1 stop17h 25m
Deal found 9/29![United Airlines logo]()
$906
This Kiwi.com deal was found by Cheapflights users on 9/25. 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.
Mon 12/282:30 pm -
2 stops34h 55m
Thu 1/76:00 am -
1 stop18h 40m
Deal found 9/25![Multiple Airlines logo]()
$909
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/286:55 pm -
1 stop30h 30m
Wed 1/610:15 am -
2 stops38h 45m
Deal found 9/28![Multiple Airlines logo]()
$914
This Kiwi.com deal was found by Cheapflights users on 9/25. 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.
Mon 12/286:55 pm -
1 stop30h 30m
Fri 1/810:25 am -
2 stops38h 35m
Deal found 9/25![Multiple Airlines logo]()
$927
This Cheapflightsfares deal was found by Cheapflights users on 9/25. 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 10/67:10 pm -
2 stops17h 25m
Tue 10/139:15 pm -
2 stops27h 55m
Deal found 9/25![Aer Lingus logo]()
$933
This Cheapflightsfares deal was found by Cheapflights users on 9/25. 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 10/1211:55 pm -
1 stop21h 30m
Mon 10/199:15 pm -
2 stops27h 55m
Deal found 9/25![Aer Lingus logo]()
$938
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/286:55 pm -
1 stop30h 30m
Tue 1/510:35 am -
2 stops34h 25m
Deal found 9/28![Multiple Airlines logo]()
$954
This Kiwi.com deal was found by Cheapflights users on 9/25. 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.
Mon 12/286:55 pm -
1 stop18h 05m
Sat 1/95:55 pm -
2 stops26h 05m
Deal found 9/25![Multiple Airlines logo]()
$955
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 29, 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 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/286:55 pm -
1 stop30h 30m
Wed 1/610:15 am -
2 stops38h 45m
Deal found 9/28![Multiple Airlines logo]()
$914
This United Airlines deal was found by Cheapflights users on 9/25. 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 10/127:00 am -
1 stop19h 15m
Mon 10/1912:30 pm -
1 stop17h 25m
Deal found 9/25![United Airlines logo]()
$966
This Cheapflightsfares deal was found by Cheapflights users on 9/26. 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 10/267:45 pm -
1 stop16h 40m
Mon 11/28:05 pm -
1 stop23h 20m
Deal found 9/26![British Airways logo]()
$979
This Mytrip deal was found by Cheapflights users on 9/27. 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 11/122:35 pm -
2 stops20h 50m
Thu 11/197:50 am -
2 stops17h 10m
Deal found 9/27![Multiple Airlines logo]()
$962
This British Airways deal was found by Cheapflights users on 9/25. 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 12/286:45 pm -
1 stop14h 00m
Fri 1/88:05 pm -
1 stop23h 20m
Deal found 9/25![British Airways logo]()
$1,011
This Expedia deal was found by Cheapflights users on 9/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/287:15 am -
2 stops20h 15m
Tue 1/58:05 pm -
2 stops31h 47m
Deal found 9/28![Multiple Airlines logo]()
$1,014
This British Airways deal was found by Cheapflights users on 9/25. 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 12/286:45 pm -
1 stop16h 40m
Sat 1/97:50 am -
1 stop17h 00m
Deal found 9/25![British Airways logo]()
$1,026
This Cheapflightsfares deal was found by Cheapflights users on 9/27. 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.
Thu 11/121:40 pm -
1 stop21h 45m
Thu 11/197:50 am -
1 stop17h 00m
Deal found 9/27![British Airways logo]()
$1,027
This British Airways deal was found by Cheapflights users on 9/25. 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 12/282:24 pm -
2 stops21h 01m
Thu 1/75:30 pm -
2 stops58h 43m
Deal found 9/25![British Airways logo]()
$1,040
Last-minute flights from Seattle to ShannonDiscover last-minute flight deals from Seattle to Shannon. Data last updated September 29, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Shannon. Data last updated September 29, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/29. 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 9/307:00 am -
1 stop19h 15m
Wed 10/712:30 pm -
1 stop17h 25m
Deal found 9/29![United Airlines logo]()
$906
This Cheapflightsfares deal was found by Cheapflights users on 9/25. 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 10/67:10 pm -
2 stops17h 25m
Tue 10/139:15 pm -
2 stops27h 55m
Deal found 9/25![Aer Lingus logo]()
$933
This Air Canada deal was found by Cheapflights users on 9/25. 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.
Tue 10/67:55 am -
2 stops24h 15m
Tue 10/137:30 am -
3 stops19h 02m
Deal found 9/25![Multiple Airlines logo]()
$1,136
This Cheapflightsfares deal was found by Cheapflights users on 9/25. 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 10/1211:55 pm -
1 stop21h 30m
Mon 10/199:15 pm -
2 stops27h 55m
Deal found 9/25![Aer Lingus logo]()
$938
This United Airlines deal was found by Cheapflights users on 9/25. 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 10/127:00 am -
1 stop19h 15m
Mon 10/1912:30 pm -
1 stop17h 25m
Deal found 9/25![United Airlines logo]()
$966
This Cheapflightsfares deal was found by Cheapflights users on 9/26. 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 10/267:45 pm -
1 stop16h 40m
Mon 11/28:05 pm -
1 stop23h 20m
Deal found 9/26![British Airways logo]()
$979
This Air Canada deal was found by Cheapflights users on 9/26. 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 10/268:40 am -
2 stops25h 05m
Mon 11/27:50 am -
3 stops22h 07m
Deal found 9/26![Air Canada logo]()
$1,051
This Mytrip deal was found by Cheapflights users on 9/26. 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.
Mon 10/263:35 pm -
3 stops23h 55m
Mon 11/25:45 am -
3 stops45h 09m
Deal found 9/26![Multiple Airlines logo]()
$1,094
One-way flights from Seattle to ShannonSearch for one-way flight options from Seattle to Shannon. Find affordable one-way fares based on user searches. Data last updated September 29, 2026.
Search for one-way flight options from Seattle to Shannon. Find affordable one-way fares based on user searches. Data last updated September 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/26. 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.
Mon 2/12:35 pm -
3 stops47h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![Multiple Airlines logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 9/26. 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.
Thu 2/42:35 pm -
3 stops33h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![Multiple Airlines logo]()
$369
This Kiwi.com deal was found by Cheapflights users on 9/29. 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 12/152:35 pm -
3 stops35h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![Multiple Airlines logo]()
$395
This Cheapflightsfares deal was found by Cheapflights users on 9/26. 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 2/16:45 pm -
1 stop16h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![British Airways logo]()
$434
This Kiwi.com deal was found by Cheapflights users on 9/25. 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.
Fri 1/12:35 pm -
2 stops36h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![Multiple Airlines logo]()
$475
This Cheapflightsfares deal was found by Cheapflights users on 9/29. 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 12/151:30 pm -
1 stop21h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![British Airways logo]()
$687
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 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $909 (Kiwi.com) |
One-way from | $316 (Kiwi.com) |
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 29, 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
Mon 2/1
2:35 pm-10:25 pm
3 stops47h 50m
Shannon
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$316
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Thu 2/4
2:35 pm-6:45 pm
2 stops20h 10m
Shannon
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$370
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Tue 12/15
2:35 pm-9:55 am
3 stops35h 20m
Shannon
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$395
Quickest round-trip
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Mon 2/1
6:45 pm-7:25 pm
1 stop16h 40m
Shannon
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$434
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Fri 1/1
2:35 pm-11:30 am
2 stops36h 55m
Shannon
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$475
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Tue 12/15
1:30 pm-7:25 pm
1 stop21h 55m
Shannon
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$687
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Mon 12/28
6:55 pm-9:25 am
1 stop30h 30m
Shannon
Wed 1/6
10:15 am-5:00 pm
2 stops38h 45m
$914
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Thu 11/12
2:35 pm-7:25 pm
2 stops20h 50m
Shannon
Thu 11/19
7:50 am-5:00 pm
2 stops17h 10m
$962
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Mon 10/12
7:00 am-10:15 am
1 stop19h 15m
Shannon
Mon 10/19
12:30 pm-9:55 pm
1 stop17h 25m
$966
SeattleShannon
SEA Seattle/Tacoma Intl - SNN Shannon
SEASNN
Seattle/Tacoma Intl
Mon 10/26
7:45 pm-7:25 pm
1 stop16h 40m
Shannon
Mon 11/2
8:05 pm-11:25 am
1 stop23h 20m
$979
Showing 1-10 of 15 resultsSorted 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 29, 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.
Comfort
7.3
Crew
8.1
Overall
7.4
Food
6.7
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
Comfort
7.3
Crew
8.1
Overall
7.4
Food
6.7
Entertainment
7.1
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentAsha,Sep 2026
LGA - IAH
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Seattle
Popular flights
Shannon flight routes
Alternative routes for Seattle to Shannon
See prices for flight routes from nearby airports that may be better suited for you.
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 29, 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 29, 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 29, 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 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$592 | Average$1,095 | FlexibilityNo cancel fee | On-time69% |