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$470+ Cheap flights from Shannon (SNN) to Seattle (SEA)

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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
SNN — SEA
Mar 12 — Mar 191
Thu 3/12
Thu 3/19
1 adult, Economy
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Cheap flight deals from Shannon to Seattle

Cheapest flights from Shannon to Seattle
Explore the most affordable flight options available from Shannon to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 10, 2026.

This Air Canada deal was found by Cheapflights users on 2/6. 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.
Fri 11/67:50 am
SNN
-
SEA
2 stops38h 41m
Air Canada
Tue 11/103:05 pm
SEA
-
SNN
2 stops36h 25m
Air Canada
Deal found 2/6$968
This British Airways deal was found by Cheapflights users on 2/6. 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.
Fri 11/68:05 pm
SNN
-
SEA
1 stop23h 25m
British Airways
Tue 11/105:45 pm
SEA
-
SNN
2 stops17h 40m
British Airways
Deal found 2/6$970
This British Airways deal was found by Cheapflights users on 2/8. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/198:05 pm
SNN
-
SEA
2 stops34h 59m
British Airways
Tue 2/247:15 am
SEA
-
SNN
2 stops28h 10m
British Airways
Deal found 2/8$977
This TravelUp deal was found by Cheapflights users on 2/8. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/192:45 pm
SNN
-
SEA
1 stop15h 15m
Multiple Airlines
Tue 2/241:37 pm
SEA
-
SNN
2 stops19h 08m
Multiple Airlines
Deal found 2/8$1,010
This Gotogate deal was found by Cheapflights users on 2/8. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/198:05 pm
SNN
-
SEA
1 stop23h 25m
Aer Lingus
Tue 2/246:50 pm
SEA
-
SNN
1 stop32h 40m
Aer Lingus
Deal found 2/8$1,069
This Air Canada deal was found by Cheapflights users on 2/8. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/197:50 am
SNN
-
SEA
3 stops33h 25m
Air Canada
Tue 2/245:45 am
SEA
-
SNN
2 stops27h 00m
Air Canada
Deal found 2/8$2,188

Find flight deals from Shannon to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Shannon (SNN) to Seattle (SEA). 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 February 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars
Provider with most accurate pricing for Shannon-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Shannon-Seattle/Tacoma Intl flights.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Shannon to Seattle 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 February 10, 2026.
Use the filters below to find and compare flights from Shannon to Seattle that are best for you.

Fly from

Shannon

Fly to

Seattle

Route

Depart

Return

Price

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Tue 2/24

5:30 pm-6:20 pm

2 stops32h 50m

$470

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Wed 2/25

7:50 am-6:20 pm

2 stops18h 30m

$508

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Sat 7/4

5:25 pm-5:10 pm

2 stops31h 45m

$587

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Tue 7/14

7:30 am-5:10 pm

2 stops17h 40m

$630

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Tue 7/14

1:35 pm-8:43 pm

3 stops39h 08m

$647

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Sat 7/4

6:10 am-4:00 pm

3 stops41h 50m

$723

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Tue 2/24

7:50 am-4:55 pm

1 stop17h 05m

$1,044

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Wed 2/25

7:50 am-4:55 pm

1 stop17h 05m

$1,044

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/7

  • Most accurate provider: When it comes to deals on Shannon, Clare-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Shannon, Clare-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Shannon, Clare-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Shannon, Clare-Seattle 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 Shannon, Clare-Seattle 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 Shannon to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Shannon 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.

Related info for your journey

Find useful and relevant information for your journey from Shannon to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Shannon to Seattle that include hotel bookings?

    Yes. In addition to deals on Shannon to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Shannon to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Shannon to Seattle.

  • Can I find deals for business class flights from Shannon to Seattle?

    Yes. Cheapflights offers flight deals from Shannon to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Edmonds
Lacey
Kent
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

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