SEA - SNN

$335 Find Cheap Flights from Seattle to Shannon - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$733
Typical prices: $751-$1,132
United Airlines
Wed 4/11Fri 4/20
SEA - SNN • 1 stop
Cheapest one-way
$335
Typical prices: $538-$679
Multiple Airlines
Sat 4/21
SEA - SNN • 3 stops
Nonstop flights
Not available
There are currently no direct flights between Seattle and Shannon. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
February
Cheapest • 48% price drop
August
Most popular
Good to know
+1
Good to know
+1
Top layover airports
London Heathrow (LHR)
Cheapest • Avg $659 (round-trip)
Chicago O'Hare Intl (ORD)
Shortest trip • 13h 59m (one-way)
Insights
Insights
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Shannon (SEA-SNN)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Shannon

Sun, Apr 11 - Tue, Apr 20
United Airlines Logo
6:50 am - 10:15 amSEA  Seattle/Tacoma Intl-SNN Shannon
19h 25m1 stop Newark
United Airlines Logo
12:30 pm - 9:05 pmSNN  Shannon-SEA Seattle/Tacoma Intl
16h 35m1 stop Newark
$733United Airlines
Mon, Apr 19 - Fri, Apr 23
United Airlines Logo
6:50 am - 10:15 amSEA  Seattle/Tacoma Intl-SNN Shannon
19h 25m1 stop Newark
United Airlines Logo
12:30 pm - 9:05 pmSNN  Shannon-SEA Seattle/Tacoma Intl
16h 35m1 stop Newark
$733United Airlines
Mon, Apr 19 - Fri, Apr 23
United Airlines Logo
8:30 am - 10:15 amSEA  Seattle/Tacoma Intl-SNN Shannon
17h 45m2 stops Denver Intl Newark
United Airlines Logo
12:30 pm - 9:05 pmSNN  Shannon-SEA Seattle/Tacoma Intl
16h 35m1 stop Newark
$733United Airlines
Mon, Apr 5 - Wed, Apr 28
United Airlines Logo
6:50 am - 10:15 amSEA  Seattle/Tacoma Intl-SNN Shannon
19h 25m1 stop Newark
United Airlines Logo
12:30 pm - 9:05 pmSNN  Shannon-SEA Seattle/Tacoma Intl
16h 35m1 stop Newark
$733United Airlines
Mon, Apr 5 - Wed, Apr 28
United Airlines Logo
6:50 am - 10:15 amSEA  Seattle/Tacoma Intl-SNN Shannon
19h 25m1 stop Newark
United Airlines Logo
12:30 pm - 9:05 pmSNN  Shannon-SEA Seattle/Tacoma Intl
16h 35m1 stop Newark
$734United Airlines
Sun, Apr 11 - Tue, Apr 20
United Airlines Logo
6:50 am - 10:15 amSEA  Seattle/Tacoma Intl-SNN Shannon
19h 25m1 stop Newark
United Airlines Logo
12:30 pm - 9:05 pmSNN  Shannon-SEA Seattle/Tacoma Intl
16h 35m1 stop Newark
$734United Airlines
Mon, Apr 19 - Fri, Apr 23
United Airlines Logo
6:50 am - 10:15 amSEA  Seattle/Tacoma Intl-SNN Shannon
19h 25m1 stop Newark
United Airlines Logo
12:30 pm - 9:05 pmSNN  Shannon-SEA Seattle/Tacoma Intl
16h 35m1 stop Newark
$734United Airlines
Tue, Nov 17 - Tue, Nov 24
Multiple Airlines Logo
2:35 pm - 10:25 pmSEA  Seattle/Tacoma Intl-SNN Shannon
23h 50m2 stops Reykjavik Keflavik Intl London Heathrow
Multiple Airlines Logo
2:35 pm - 5:00 pmSNN  Shannon-SEA Seattle/Tacoma Intl
34h 25m1 stop London Stansted
$886Multiple Airlines
Tue, Nov 17 - Wed, Nov 25
Multiple Airlines Logo
2:35 pm - 10:25 pmSEA  Seattle/Tacoma Intl-SNN Shannon
23h 50m2 stops Reykjavik Keflavik Intl London Heathrow
Multiple Airlines Logo
6:55 pm - 5:00 pmSNN  Shannon-SEA Seattle/Tacoma Intl
30h 05m1 stop London Stansted
$886Multiple Airlines
Tue, Jan 12 - Thu, Jan 21
Multiple Airlines Logo
2:35 pm - 9:25 amSEA  Seattle/Tacoma Intl-SNN Shannon
34h 50m2 stops Reykjavik Keflavik Intl London Heathrow
Multiple Airlines Logo
6:00 am - 4:50 pmSNN  Shannon-SEA Seattle/Tacoma Intl
18h 50m1 stop London Stansted
$896Multiple Airlines
Booking Insights

Price, demand and travel trends for Seattle to Shannon flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Seattle to Shannon?

Round-trip flights from Seattle to Shannon typically range from $751 to $1,132. The lowest price found in the past 5 days was $733, on United Airlines.

What's the cheapest day of the week to fly from Seattle to Shannon?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Seattle to Shannon. It’s 48% cheaper than the average day, while Sunday is the most expensive, with prices 37% higher.

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Key details for Seattle to Shannon flights

Low season

November

Cheapest flight

$335
Beat the crowds with an average 92% drop in travelers.
The most popular month to fly with an average 70% increase in travelers.
One-way flight from Seattle to Shannon

When to book flights from Seattle to Shannon

Are your dates flexible? Find out the best times to travel from Seattle to Shannon based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Seattle to Shannon flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Seattle to Shannon?

    Three cabin classes are available on flights from Seattle to Shannon:

    • Economy Class
    • Business Class
    • First Class

  • How long is a flight from Seattle to Shannon?

    A nonstop flight from Seattle to Shannon takes 00m, covering 4,485 miles.

  • Do I need a passport to fly from Seattle to Shannon?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Seattle to Shannon flight?

    Round-trip flights from Seattle to Shannon range from $751 to $1,132, with an average of $901 over the past 12 months. Anything below $751 counts as a good deal.

  • Have flight prices from Seattle to Shannon changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $733 to $6,167. That means the highest observed fare was about 8x higher than the lowest one.

  • How are flight prices from Seattle to Shannon looking right now?

    One-way fares from Seattle to Shannon are currently lower than usual. Average one-way flight prices are about $394, which is 33% below the typical average for this route.

  • What car rental options are available at Shannon Airport (SNN)?

    Shannon Airport (SNN) hosts 5 major car rental companies, with daily rates averaging $33 for economy cars. Top options include:

    • Budget
    • Sixt
    • Europcar
    • Easirent
    • Thrifty

  • Which airports can I use when flying from Seattle to Shannon?

    Flights from Seattle to Shannon usually depart from Seattle/Tacoma Intl (SEA) and arrive at Shannon (SNN).

  • Which airports do connecting flights from Seattle to Shannon pass through?

    One-stop flights from Seattle to Shannon most commonly connect through:

    • London Heathrow (LHR) - 30% of one-stop connections
    • New York John F Kennedy Intl (JFK) - 23% of one-stop connections
    • Chicago O'Hare Intl (ORD) - 23% of one-stop connections
    • Newark (EWR) - 17% of one-stop connections

  • Can I save money by using flexible dates for flights from Seattle to Shannon?

    Yes. Flexible dates can save you up to 63% on flights from Seattle to Shannon. Wednesday is the cheapest departure day at $470 round-trip on average, while Sunday is the most expensive at $1,241, a difference of $771.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Seattle to Shannon?

    Flying via Chicago O'Hare Intl (ORD) gives the shortest average 1-stop total travel time at 13h 59m, compared with 15h 12m via Boston Logan Intl (BOS) and 15h 19m via Newark (EWR).

  • What is the time difference between Seattle and Shannon?

    Shannon is 7 hours ahead of Seattle (Irish Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

Your guide to booking Seattle to Shannon flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Sunday. On this route, Wednesday flights average $470, about $771 less than Sunday fares (62% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Seattle to Shannon trip for February. Fares historically average $469 round-trip in that month - typically $912 less than the most expensive month, which is October (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Shannon Airport.

    • Park Inn by Radisson Shannon Airport
    • Treacys Oakwood Hotel
    • Carrygerry Country House

More options for your flight from Seattle to Shannon

Complete your trip to Shannon with a hotel stay or car rental

Car rentals in Shannon
Hotels in Shannon