551 € Cheap Flights from Portland to Shannon

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Travellers and cabin class, 1 Adult, Economy

Compare Portland to Shannon flight deals

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

Book the best Shannon fare with no extra fees

Flight deals Cheapest month Find the best route Route info FAQs Tips and advice

Flight deals from Portland to Shannon

Looking for a cheap last-minute deal or the best return flight from Portland Airport to Shannon Airport? If you want to travel next month, return fares start from 763 €. Find the lowest prices on one-way and return tickets right here.

Shannon.551 € per passenger.Departing Mon, 5 Oct, returning Mon, 12 Oct.Return flight with Icelandair and Ryanair.Outbound indirect flight with Icelandair, departs from Portland on Mon, 5 Oct, arriving in Shannon.Inbound indirect flight with Ryanair, departs from Shannon on Mon, 12 Oct, arriving in Portland.Price includes taxes and charges.From 551 €, select.

Shannon.657 € per passenger.Departing Tue, 11 May, returning Tue, 25 May.Return flight with United.Outbound indirect flight with United, departs from Portland on Tue, 11 May, arriving in Shannon.Inbound indirect flight with United, departs from Shannon on Tue, 25 May, arriving in Portland.Price includes taxes and charges.From 657 €, select.

Shannon.694 € per passenger.Departing Thu, 8 Apr, returning Thu, 15 Apr.Return flight with United.Outbound indirect flight with United, departs from Portland on Thu, 8 Apr, arriving in Shannon.Inbound indirect flight with United, departs from Shannon on Thu, 15 Apr, arriving in Portland.Price includes taxes and charges.From 694 €, select.

Shannon.763 € per passenger.Departing Wed, 23 Sep, returning Sun, 27 Sep.Return flight with Icelandair and Ryanair.Outbound indirect flight with Icelandair, departs from Portland on Wed, 23 Sep, arriving in Shannon.Inbound indirect flight with Ryanair, departs from Shannon on Sun, 27 Sep, arriving in Portland.Price includes taxes and charges.From 763 €, select.

Shannon.841 € per passenger.Departing Tue, 29 Jun, returning Wed, 7 Jul.Return flight with Air France.Outbound indirect flight with Air France, departs from Portland on Tue, 29 Jun, arriving in Shannon.Inbound indirect flight with Air France, departs from Shannon on Wed, 7 Jul, arriving in Portland.Price includes taxes and charges.From 841 €, select.

Shannon.855 € per passenger.Departing Sat, 20 Mar, returning Sun, 28 Mar.Return flight with Air Canada.Outbound indirect flight with Air Canada, departs from Portland on Sat, 20 Mar, arriving in Shannon.Inbound indirect flight with Air Canada, departs from Shannon on Sun, 28 Mar, arriving in Portland.Price includes taxes and charges.From 855 €, select.

Shannon.872 € per passenger.Departing Wed, 9 Dec, returning Wed, 6 Jan.Return flight with Alaska Airlines and Ryanair.Outbound indirect flight with Alaska Airlines, departs from Portland on Wed, 9 Dec, arriving in Shannon.Inbound indirect flight with Ryanair, departs from Shannon on Wed, 6 Jan, arriving in Portland.Price includes taxes and charges.From 872 €, select.

Shannon.1.065 € per passenger.Departing Sat, 27 Mar, returning Sat, 3 Apr.Return flight with Alaska Airlines and Ryanair.Outbound indirect flight with Alaska Airlines, departs from Portland on Sat, 27 Mar, arriving in Shannon.Inbound indirect flight with Ryanair, departs from Shannon on Sat, 3 Apr, arriving in Portland.Price includes taxes and charges.From 1.065 €, select.

Shannon.5.409 € per passenger.Departing Thu, 15 Jul, returning Fri, 16 Jul.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Portland on Thu, 15 Jul, arriving in Shannon.Inbound indirect flight with Lufthansa, departs from Shannon on Fri, 16 Jul, arriving in Portland.Price includes taxes and charges.From 5.409 €, select.

Find the cheapest month to fly from Portland to Shannon

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

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Portland to Shannon: Alternative routes

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

Portland to Shannon: Flight information

The things to know before you go.

Cheapest flight found	551 €
Cheapest month to fly	October

Finding cheap flights from Portland to Shannon: Frequently asked questions

How much are return flights from Portland to Shannon?

The best price we found for a return flight from Portland to Shannon is 551 €. 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.

Which airlines fly direct from Portland to Shannon?

Currently, there are no airlines that fly direct from Portland to Shannon. But we found flights with one or more stops from 551 €.

How many flights are there a week from Portland to Shannon?

As of August 2026, there are no flights flying from Portland to Shannon.

When is the cheapest time to fly from Portland to Shannon?

The cheapest month to fly from Portland to Shannon is usually October.

Which upcoming date is cheapest to fly from Portland Airport to Shannon Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Portland Airport to Shannon Airport on Monday, 5 October 2026.

Can I get a direct flight from Portland Airport to Shannon Airport?

No airlines currently offer direct flights between Portland Airport and Shannon Airport. Most routes have one or more stops.

How can I find the best flight deal to Shannon?

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.

When is the best time to book flights to Shannon?

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.

Which is the cheapest airline to fly from Portland Airport to Shannon with?

Currently, Icelandair offers the cheapest flight tickets to Shannon.

Flying from Portland Airport (PDX) to Shannon Airport (SNN): what you need to know

Shannon's timezone is UTC+0, making Shannon eight hours ahead of Portland.
To ensure you get on your PDX to SNN flight, leave plenty of time to check in and find your gate. Turning up two hours ahead of international departures and one hour before domestic flights is the general rule.
Travelling during a peak month such as July? Public holidays and other popular periods can lead to longer lines and delays at check-in and security. Play it safe and get there up to four hours before international flights and two hours before a domestic departure.
Consider adding a stopover when booking your ticket from Portland Airport to Shannon Airport. Just uncheck 'Direct flights only' to break up your trip, or maybe even explore a new city along the way. Here's where you can stop between PDX and SNN:
- Chicago O'Hare International Airport
- London Heathrow Airport
- New York John F. Kennedy Airport

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

The cheapest price we've found for a one-way Portland Airport to Shannon Airport flight is 238 €. A round-trip fare right now is 551 €. Depending on the availability and when you book, these fares can change.
Don't leave everything to the last moment. You're more likely to find cheap tickets from PDX to SNN if you book in advance. Airlines often offer some amazing early bird deals.
The 'Whole month' search tool shows you the cheapest flights from Portland Airport to Shannon Airport across each month. It's a good way to snap up a bargain if your plans aren't set in stone.
Snapping up cheap flights from PDX to SNN is a cinch with Price Alerts. Simply set up one of these automatic alerts and we'll notify you as soon as there's a better deal.
Tailor your trip with filters. Select your ideal arrival and departure times, total journey duration and airlines. You can also sort your results by 'Fastest,' 'Cheapest' or 'Best' flights from Portland Airport to Shannon Airport.

Handy information about Portland Airport (PDX)

You'll find PDX at 7000 NE Airport Way.
83% of flights departing from Portland Airport touch down at their destination on time. With its strong performance rating, you're unlikely to experience delays when taking off from PDX.
Portland Airport is about 19 kilometres from central Portland. If you're driving, ride-sharing or catching a taxi from the centre, it'll take 20 minutes or so to get there, depending on the traffic.
The journey when using public transport takes about 40 minutes.
Get your trip off to a leisurely start by staying near PDX. Whether you're boarding an early flight from Portland Airport to Shannon Airport or just don't like being rushed, these hotels are perfect:

Arriving at Shannon Airport (SNN)

The last thing you need is a lengthy trip to your hotel if you're getting in late on a Portland Airport to Shannon Airport flight. Stay at one of these accommodation options near SNN instead:
Travel at your own speed with a Shannon Airport rental car. Book your wheels from Easirent, Budget or Carhire and chase adventure across Shannon and beyond.
Booking your vehicle from Shannon Airport around four weeks in advance gives you the best shot at securing a great deal.

When to fly to Shannon Airport (SNN)

It's time to choose your trip dates for your flight from Portland Airport to Shannon Airport. June is the busiest month to visit Shannon. If you prefer a more relaxed vibe, go in February.
The warmest month in Shannon is July, with the temperature ranging between 9ºC (48ºF) and 22ºC (72ºF). Lock in your flights from Portland Airport to Shannon Airport in this month if this is the type of weather you enjoy.
Look for cheap tickets from PDX to SNN in January if you like cooler conditions. Temperatures are at their lowest then, ranging between 0ºC (32ºF) and 9ºC (48ºF) on average.

Explore more of Ireland

Dublin is just one of the many places in Ireland waiting to be discovered after you've experienced Shannon. Around 193 kilometres away to the north-east, popular attractions include Guinness Storehouse, Trinity College Library and St. Patrick's Cathedral.
Around 97 kilometres south of Shannon, Cork is another favourite stop in Ireland. Start your sightseeing at Blarney Castle & Gardens, Blarney Castle House(Teach Caisleán na Blarnan) and Blarney Stone.