541 € Portland to Shannon Cheap Flights

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Flight deals from Portland to Shannon

Looking for a cheap last-minute deal or the best return flight from Portland to Shannon? Find the lowest prices on one-way and return tickets right here.

Shannon.541 € per passenger.Departing Tue, 30 Sep, returning Tue, 7 Oct.Return flight with United.Outbound indirect flight with United, departs from Portland on Tue, 30 Sep, arriving in Shannon.Inbound indirect flight with United, departs from Shannon on Tue, 7 Oct, arriving in Portland.Price includes taxes and charges.From 541 €, select.

Shannon.570 € per passenger.Departing Sun, 26 Oct, returning Sat, 15 Nov.Return flight with Aer Lingus.Outbound indirect flight with Aer Lingus, departs from Portland on Sun, 26 Oct, arriving in Shannon.Inbound indirect flight with Aer Lingus, departs from Shannon on Sat, 15 Nov, arriving in Portland.Price includes taxes and charges.From 570 €, select.

Shannon.614 € per passenger.Departing Fri, 29 Aug, returning Sat, 20 Sep.Return flight with United.Outbound indirect flight with United, departs from Portland on Fri, 29 Aug, arriving in Shannon.Inbound indirect flight with United, departs from Shannon on Sat, 20 Sep, arriving in Portland.Price includes taxes and charges.From 614 €, select.

Shannon.648 € per passenger.Departing Mon, 1 Sep, returning Mon, 8 Sep.Return flight with United.Outbound indirect flight with United, departs from Portland on Mon, 1 Sep, arriving in Shannon.Inbound indirect flight with United, departs from Shannon on Mon, 8 Sep, arriving in Portland.Price includes taxes and charges.From 648 €, select.

Shannon.657 € per passenger.Departing Fri, 3 Oct, returning Fri, 10 Oct.Return flight with United.Outbound indirect flight with United, departs from Portland on Fri, 3 Oct, arriving in Shannon.Inbound indirect flight with United, departs from Shannon on Fri, 10 Oct, arriving in Portland.Price includes taxes and charges.From 657 €, select.

Shannon.997 € per passenger.Departing Sun, 24 Aug, returning Sat, 30 Aug.Return flight with Air France.Outbound indirect flight with Air France, departs from Portland on Sun, 24 Aug, arriving in Shannon.Inbound indirect flight with Air France, departs from Shannon on Sat, 30 Aug, arriving in Portland.Price includes taxes and charges.From 997 €, select.

Shannon.1.136 € per passenger.Departing Wed, 17 Jun, returning Fri, 26 Jun.Return flight with Delta.Outbound indirect flight with Delta, departs from Portland on Wed, 17 Jun, arriving in Shannon.Inbound indirect flight with Delta, departs from Shannon on Fri, 26 Jun, arriving in Portland.Price includes taxes and charges.From 1.136 €, 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 September.

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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	541 €
Cheapest month to fly	September

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 541 €. 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 541 €.

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

As of August 2025, 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 September.

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 Tuesday, 30 September 2025.

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, United offers the cheapest flight tickets to Shannon.

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

The timezone in Shannon is UTC+0, which is seven hours ahead of Portland.
Leave enough time to make your PDX to SNN flight. A good rule of thumb is to arrive at least two hours before international departures and an hour ahead for domestic flights.
You'll likely experience longer lines during popular months like July. Arriving up to four hours in advance for international flights and two hours for a domestic departure is a smart move.
Consider adding a stopover when booking your ticket from Portland International Airport to Shannon Airport. Simply deselect 'Direct flights only' to break up your trip, or visit a new city along the way. Check out these options between PDX and SNN:
- O'Hare International Airport
- London Heathrow Airport
- John F. Kennedy International Airport

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

The cheapest price we've found for a one-way Portland International Airport to Shannon Airport flight is 252 €. A return plane ticket is currently 541 €. Depending on the availability when you book, these fares may change.
To score cheap tickets from PDX to SNN, book as early as you can. Airlines usually offer their most competitively priced fares when flights are first released.
Getting cheap flights from Portland International Airport to Shannon Airport is easy if you can be flexible with your trip dates. Use the 'Whole month' search function to see the lowest prices across every month and snap up a great deal.
You don't need to check back in every day to see if fares have dropped when you create a Price Alert. We'll send you an update the moment a special offer becomes available on cheap flights from PDX to SNN.
Choose your ideal departure and arrival times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to see the best deals on flights from Portland International Airport to Shannon Airport.

Handy information about Portland International Airport (PDX)

PDX is located at 7000 NE Airport Way.
Portland International Airport gets high marks for its on-time performance. 83.65% of flights that take off from PDX reach their destination on time.
To get to Portland International Airport from central Portland, it takes about 20 minutes by car. This depends on traffic though. It's approximately 19 kilometres from the airport to the city centre.
Expect a trip time of about 45 minutes when using public transport.
Get your break off to a relaxed start by staying near PDX. Whether you have an early flight from Portland International Airport to Shannon Airport or just don't like being rushed, these stays are perfect:

Arriving at Shannon Airport (SNN)

The last thing you need is a lengthy journey to your hotel if you're arriving on a late Portland International Airport to Shannon Airport flight. Book one of these accommodation options near SNN instead:
Grab a Shannon Airport rental car and discover Shannon and beyond with your own wheels. Easirent, Budget and Carhire are top providers to choose from here.
Booking your ride from Shannon Airport around four weeks ahead boosts your odds of scoring a great price.

Getting from Shannon Airport (SNN) to central Shannon

Shannon Airport is approximately 5 kilometres from the centre of Shannon. The drive time takes about 5 minutes.
It takes around 10 minutes if you're using public transport.

When to fly to Shannon Airport (SNN)

The quietest month for a flight from Portland International Airport to Shannon Airport is April, while August is the most popular. Choose the best time to go to Shannon based on whether you prefer a bustling atmosphere or a more laid-back vibe.
Lock in your flight from Portland International Airport to Shannon Airport for July if you'd like to visit Shannon during its warmest month. You can expect temperatures of between 10ºC (50ºF) and 22ºC (72ºF).
Look for cheap tickets from PDX to SNN in January if you'd rather travel during cooler conditions. Temperatures are at their lowest around then, ranging between 0ºC (32ºF) and 9ºC (48ºF) on average.

Explore more of Ireland

Shannon has loads to offer, but there are so many other parts of Ireland you'll want to see. Around 193 kilometres north-east of Shannon, a visit to Dublin will keep you busy. Don't miss top attractions like Guinness Storehouse, Trinity College Library and Dublin Castle.
Around 97 kilometres south of Shannon, Cork is another favourite stop in Ireland. Get a taste of what this destination has to offer at Blarney Castle, Fota Wildlife Park and Titanic Experience Cobh.