Cheap Flights from Seattle to Shannon

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Find the cheapest month or even day of the year to fly to Shannon

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Find the cheapest month to fly from Seattle to Shannon

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to Shannon flights are currently cheapest in September.

Seattle to Shannon: Alternative routes

Compare routes from Seattle to Shannon below. You may find an airport to fly into that's cheaper, faster, or easier than Shannon.

Seattle to Shannon: Flight information

The things to know before you go.
Cheapest flight foundR 5,443
Cheapest month to flySeptember

Finding cheap flights from Seattle to Shannon: Frequently asked questions

The best price we found for a return flight from Seattle to Shannon is R 10,861. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Seattle to Shannon. But we found flights with one stop from R 10,861.
As of August 2025, there are no flights flying from Seattle to Shannon.
The cheapest month to fly from Seattle to Shannon is usually September.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Shannon Airport on Thursday, 18 September 2025.
No airlines currently offer direct flights between Seattle and Shannon Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Shannon but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Shannon is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Shannon is United .

Flying from Seattle to Shannon Airport (SNN): What you need to know

  • Seattle has a couple of airports where you can set off on your adventure. Explore your options for reserving a flight from Seattle to Shannon Airport (SNN) taking off from Seattle-Tacoma International Airport (SEA) or Lake Union Sea Plane Base Airport (LKE).

  • The timezone in Shannon is UTC+0, which is seven hours ahead of Seattle. Shannon Airport is located in Shannon.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are tried-and-true travel tips. Be at the airport on time to catch your flight from Seattle to SNN.

  • Planning to travel during a peak period like school or public holidays? Expect longer queues at check-in and security. To play it safe, arrive up to four hours before international flights and two hours before domestic departures.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Stopovers are the ideal opportunity to break up your journey and perhaps even visit a new city. When searching for cheap flights from Seattle to SNN leaving from Seattle-Tacoma International Airport (SEA), deselect the 'Direct flights only' box to find all potential stops. Top options include:

    • O'Hare International Airport (ORD)

    • London Heathrow Airport (LHR)

    • John F. Kennedy International Airport (JFK)

  • The journey from central Seattle to SEA takes about 55 minutes by public transport. If you ride-share, drive or take a cab, you'll cover the 23 kilometres in 20 minutes or so, depending on traffic conditions.

  • Want a stress-free start to your travels? Stay near Seattle-Tacoma International Airport. Whether you've booked an early flight from Seattle to Shannon Airport or prefer not to rush, these hotels offer the perfect solution:

  • Seattle-Tacoma International Airport has an excellent on-time performance, reducing the likelihood of delays. Departures from SEA touch down on schedule 81.27% of the time.

Lake Union Sea Plane Base Airport (LKE)

  • LKE is about 3 kilometres from central Seattle. It'll take you 10 minutes or so to get to the airport if you're driving from the city centre. Public transport takes roughly 25 minutes.

  • Kick off your holiday early with an extra night away from home. Before your Seattle to SNN flight, stay in one of these hotels near Lake Union Sea Plane Base Airport:

About Shannon Airport (SNN)

Getting from Shannon Airport (SNN) to central Shannon

  • Shannon Airport is about 3 kilometres from central Shannon. The time it takes to get to the centre in a cab or car hire depends on the time of day. Do a little research before you go.

  • Travelling by public transport will take you roughly 10 minutes.

How to find the cheapest flights from Seattle to Shannon Airport (SNN)

  • The lowest price we've found for a one-way ticket from Seattle to Shannon Airport is R 5,443. For a return flight on this route, the best price is R 10,861. Depending on when you want to go and the availability, these fares may change.

  • Booking ahead of time is often the key to scoring a cheap flight from Seattle to SNN. Fares tend to rise as seats fill up, so the closer your departure date, the more expensive your ticket may be.

  • Cheap Seattle to Shannon Airport tickets are easier to find when your travel dates are flexible. Try using the 'Whole month' tool to compare fares across every month and then choose the cheapest day.

  • Never miss a deal on plane tickets from Seattle to SNN by setting up a Price Alert. We'll send you an email or push notification on the app when a new discounted fare appears.

  • Find a cheap flight from Seattle to Shannon Airport by using the search filters. Select your preferred times, airlines and number of stops, then sort the results by 'Cheapest' for the best deals.

The best time to fly from Seattle to Shannon Airport (SNN)

  • Think about the kind of experience you want when deciding your trip dates. April is the quietest month to go to Shannon. August is when most people book flights from Seattle to Shannon Airport (SNN), which may be perfect if you're chasing more excitement.

  • Before locking in your Seattle to SNN plane ticket, consider the kind of weather you prefer. July is the warmest month in Shannon, with temperatures ranging from 10ºC (50ºF) to 22ºC (72ºF).

  • Look for cheap tickets from Seattle to Shannon Airport in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between 0ºC (32ºF) and 9ºC (48ºF).

More about Shannon

  • Once you've booked your flight from Seattle to Shannon Airport, find a hotel that offers the right mix of comfort and location. Make one of these options your base for exploring Shannon:

  • There are so many things to see and do in this city, it can be difficult to know where to begin. View Point Bunratty Castle, Atlantic Air Adventures and Lough Gorteen are popular attractions which should feature on any well-planned Shannon itinerary.

Explore more of Ireland

  • Shannon has plenty to offer, but there are so many other corners of Ireland just waiting to be discovered. About 193 kilometres north-east of Shannon, a trip to Dublin will keep you on the go. Check out popular attractions like Trinity College Library, Guinness Storehouse and St. Patrick's Cathedral.

  • Tallaght is another standout destination in Ireland and is around 177 kilometres east of Shannon. No trip is complete without dropping by St. Mark's Parish, Church of the Incarnation, Fettercairn and Roadstone Retail Belgard.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.