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Cheap flights from Seattle to Shannon from $355

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Shannon departing on 8/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Shannon

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:00 am - 7:30 amSEA  Seattle/Tacoma Intl-SNN Shannon
16h 30m1 stop Chicago O'Hare Intl
United Airlines Logo
12:30 pm - 2:22 pmSNN  Shannon-SEA Seattle/Tacoma Intl
33h 52m3 stops Newark Houston George Bush Intcntl San Francisco
$821United Airlines
Sun, Sep 13 - Tue, Sep 29
United Airlines Logo
7:00 am - 7:30 amSEA  Seattle/Tacoma Intl-SNN Shannon
16h 30m1 stop Chicago O'Hare Intl
United Airlines Logo
12:30 pm - 10:54 amSNN  Shannon-SEA Seattle/Tacoma Intl
30h 24m1 stop Newark
$821United Airlines
Sun, Sep 13 - Tue, Sep 29
United Airlines Logo
7:00 am - 7:30 amSEA  Seattle/Tacoma Intl-SNN Shannon
16h 30m2 stops San Francisco Chicago O'Hare Intl
United Airlines Logo
12:30 pm - 2:22 pmSNN  Shannon-SEA Seattle/Tacoma Intl
33h 52m3 stops Newark Houston George Bush Intcntl San Francisco
$821United Airlines
Sun, Sep 13 - Tue, Sep 29
United Airlines Logo
6:15 pm - 7:30 amSEA  Seattle/Tacoma Intl-SNN Shannon
29h 15m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
12:30 pm - 9:55 pmSNN  Shannon-SEA Seattle/Tacoma Intl
17h 25m1 stop Newark
$821United Airlines
Sun, Sep 13 - Tue, Sep 29
United Airlines Logo
5:00 am - 7:30 amSEA  Seattle/Tacoma Intl-SNN Shannon
18h 30m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
12:30 pm - 9:15 pmSNN  Shannon-SEA Seattle/Tacoma Intl
16h 45m2 stops Newark Denver Intl
$822United Airlines
Sun, Sep 20 - Tue, Oct 6
United Airlines Logo
6:32 am - 10:15 amSEA  Seattle/Tacoma Intl-SNN Shannon
19h 43m2 stops Los Angeles Newark
United Airlines Logo
12:30 pm - 9:55 pmSNN  Shannon-SEA Seattle/Tacoma Intl
17h 25m1 stop Newark
$822United Airlines
Sun, Sep 20 - Tue, Oct 6
United Airlines Logo
10:42 am - 7:30 amSEA  Seattle/Tacoma Intl-SNN Shannon
12h 48m1 stop Chicago O'Hare Intl
United Airlines Logo
12:30 pm - 9:55 pmSNN  Shannon-SEA Seattle/Tacoma Intl
17h 25m1 stop Newark
$822United Airlines
Sun, Sep 20 - Tue, Oct 6
United Airlines Logo
1:00 pm - 10:15 amSEA  Seattle/Tacoma Intl-SNN Shannon
13h 15m1 stop Newark
United Airlines Logo
12:30 pm - 9:55 pmSNN  Shannon-SEA Seattle/Tacoma Intl
17h 25m1 stop Newark
$830United Airlines
Sun, Oct 4 - Tue, Oct 13
Multiple Airlines Logo
7:00 pm - 9:30 amSEA  Seattle/Tacoma Intl-SNN Shannon
30h 30m2 stops Reykjavik Keflavik Intl London Heathrow
Multiple Airlines Logo
6:05 am - 7:00 pmSNN  Shannon-SEA Seattle/Tacoma Intl
20h 55m1 stop London Stansted
$903Multiple Airlines
Thu, Oct 1 - Thu, Oct 15
Multiple Airlines Logo
10:50 am - 8:25 pmSEA  Seattle/Tacoma Intl-SNN Shannon
25h 35m3 stops Vancouver Intl Calgary London Heathrow
Multiple Airlines Logo
8:00 am - 8:40 pmSNN  Shannon-SEA Seattle/Tacoma Intl
20h 40m2 stops London Stansted Reykjavik Keflavik Intl
$920Multiple Airlines
Sun, Sep 20 - Tue, Oct 6

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British Airways flights from Seattle to Shannon, Clare

Our best British Airways deals on Seattle to Shannon, Clare flight tickets
British Airways
Dec 14
SEA4:45 pmSeattle/Tacoma Intl
18h 40m
2 stops
SNN7:25 pmShannon
Dec 21
SNN8:05 pmShannon
23h 20m
1 stop
SEA11:25 amSeattle/Tacoma Intl
$1,007
British Airways
Dec 14
SEA6:14 amSeattle/Tacoma Intl
21h 16m
2 stops
SNN11:30 amShannon
Dec 21
SNN8:05 pmShannon
23h 20m
1 stop
SEA11:25 amSeattle/Tacoma Intl
$1,008
British Airways
Jan 14
SEA1:40 pmSeattle/Tacoma Intl
13h 50m
1 stop
SNN11:30 amShannon
Jan 17
SNN7:50 amShannon
17h 00m
1 stop
SEA4:50 pmSeattle/Tacoma Intl
$1,045

United Airlines flights from Seattle to Shannon, Clare

Our best United Airlines deals on Seattle to Shannon, Clare flight tickets
United Airlines
Sep 13
SEA7:00 amSeattle/Tacoma Intl
16h 30m
2 stops
SNN7:30 amShannon
Sep 29
SNN12:30 pmShannon
33h 52m
3 stops
SEA2:22 pmSeattle/Tacoma Intl
$821
United Airlines
Sep 20
SEA5:00 amSeattle/Tacoma Intl
18h 30m
2 stops
SNN7:30 amShannon
Oct 6
SNN12:30 pmShannon
16h 45m
2 stops
SEA9:15 pmSeattle/Tacoma Intl
$822
United Airlines
Sep 13
SEA10:42 amSeattle/Tacoma Intl
12h 48m
1 stop
SNN7:30 amShannon
Sep 29
SNN12:30 pmShannon
17h 25m
1 stop
SEA9:55 pmSeattle/Tacoma Intl
$830

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Shannon, Clare 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, momondo users made 832,500 searches. Data last updated August 14, 2026.
Use the filters below to find and compare flights from Seattle to Shannon, Clare 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

Sun 9/13

7:00 am-7:30 am

1 stop16h 30m

Shannon

Tue 9/29

12:30 pm-2:22 pm

3 stops33h 52m

$821

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sun 9/13

7:00 am-7:30 am

1 stop16h 30m

Shannon

Tue 9/29

12:30 pm-10:54 am

1 stop30h 24m

$821

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sun 9/13

7:00 am-7:30 am

2 stops16h 30m

Shannon

Tue 9/29

12:30 pm-2:22 pm

3 stops33h 52m

$821

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sun 9/13

6:15 pm-7:30 am

2 stops29h 15m

Shannon

Tue 9/29

12:30 pm-9:55 pm

1 stop17h 25m

$821

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sun 9/20

5:00 am-7:30 am

2 stops18h 30m

Shannon

Tue 10/6

12:30 pm-9:15 pm

2 stops16h 45m

$822

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sun 9/20

6:32 am-10:15 am

2 stops19h 43m

Shannon

Tue 10/6

12:30 pm-9:55 pm

1 stop17h 25m

$822
Quickest round-trip

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sun 9/20

10:42 am-7:30 am

1 stop12h 48m

Shannon

Tue 10/6

12:30 pm-9:55 pm

1 stop17h 25m

$822

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sun 10/4

1:00 pm-10:15 am

1 stop13h 15m

Shannon

Tue 10/13

12:30 pm-9:55 pm

1 stop17h 25m

$830

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Thu 10/1

7:00 pm-9:30 am

2 stops30h 30m

Shannon

Thu 10/15

6:05 am-7:00 pm

1 stop20h 55m

$903

SeattleShannon

SEA Seattle/Tacoma Intl - SNN Shannon

SEASNN

Seattle/Tacoma Intl

Sun 9/20

10:50 am-8:25 pm

3 stops25h 35m

Shannon

Tue 10/6

8:00 am-8:40 pm

2 stops20h 40m

$920

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Shannon from

How to get the cheapest flight ticket from Seattle to Shannon, Clare

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Seattle/Tacoma Intl to Shannon?

United Airlines is the most popular carrier operating from Seattle/Tacoma Intl to Shannon

When to book flights from Seattle to Shannon, Clare

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Shannon, Clare according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Shannon, Clare (SEA to SNN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Shannon, Clare

Fastest flight time

13h 15m

Direct flights

None
The fastest flight from Seattle to Shannon, Clare takes 13h 15m
There are no direct flights from Seattle to Shannon, Clare. There are no popular flight routes from Seattle to Shannon, Clare.
Search flight deals

Frequently asked questions about flying from Seattle to Shannon, Clare

  • How far is Seattle/Tacoma Intl to Shannon by plane?

    The straight-line distance from Seattle/Tacoma Intl to Shannon is 4478.2 mi. By plane, this route typically takes 13h 15m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Shannon Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Shannon Airport are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Shannon Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Shannon Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Shannon Airport.

  • What documentation or ID do you need to fly to Shannon Airport?

    The travel and health documents you'll need for your trip to Shannon Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Shannon Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Shannon, Clare?

Best airlines flying from Seattle to Shannon, Clare

Compare and see reviews for airlines that fly from Seattle to Shannon, Clare with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $468Free CancellationRating
7.1
11,929 reviews
Search American Airlines flights
United AirlinesPriceFrom $592Free CancellationRating
7.4
10,108 reviews
Search United Airlines flights

Traveling to a place near Shannon?

Book flights to Shannon if you plan to visit one of these locations
Limerick
Ennis
Adare
Bunratty
Lahinch
Tipperary

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Shannon?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Shannon for you.

Can I find flights from Seattle to Shannon with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Shannon from Seattle with this policy.

How can momondo help me find flights from Seattle to Shannon?

Once you have performed a search for Seattle to Shannon flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Seattle to Shannon right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to Shannon flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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