Cheap Flights from Shannon to Porto

Compare Shannon to Porto flight deals

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

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Flight deals from Shannon to Porto

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

Find the cheapest month to fly from Shannon to Porto

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

Direct flights from Shannon to Porto

Shannon to Porto: Alternative routes

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

Shannon to Porto: Flight information

The things to know before you go.
Cheapest flight foundR 582
Cheapest month to flyAugust
Average flight time2 hrs, 15 mins
Most popular airlineRyanair
Average flights per week3

Finding cheap flights from Shannon to Porto: Frequently asked questions

The best price we found for a return flight from Shannon to Porto is R 1,205. 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.
2 hours and 15 minutes is the average flight time from Shannon to Porto.
Ryanair flies direct from Shannon to Porto.
As of July 2025, there are 3 flights per week flying from Shannon to Porto.
The cheapest month to fly from Shannon to Porto is usually August.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Shannon Airport to Porto Airport on Thursday, 21 August 2025.
Yes – the average flight time is 2 hours and 15 minutes.
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 Porto 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 Porto is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Ryanair offers the cheapest flight tickets to Porto.

Flying from Shannon Airport (SNN) to Porto Airport (OPO): what you need to know

  • Around 2 hours 15 minutes is how long you can expect to be in the air on a direct flight from Shannon Airport to Porto Airport.

  • Shannon and Porto are in the same timezone, UTC+0.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules worth sticking to. Get to the airport on time to catch your SNN to OPO flight.

  • During popular months such as August, it's a good idea to get to the airport earlier than usual. Arrive two hours before domestic departures and four hours ahead of international flights whenever you're flying during a peak period in general.

  • Flying into Porto (and then discovering more of Portugal!) is a cinch with Ryanair. This popular carrier offers direct flights from Shannon Airport to Porto Airport.

  • Ryanair is the most frequently booked airline on this route.

  • We make it a breeze to book a flight with a stopover. To see all your options for tickets from Shannon Airport to Porto Airport, uncheck 'Direct flights only.' Then, pick a flight offering a stop long enough to tour your chosen city. Worthwhile stopovers between SNN and OPO include:

    • Stansted Airport

    • London Gatwick Airport

    • Palma de Mallorca Airport

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

  • The cheapest price we've seen for a one-way Shannon Airport to Porto Airport flight is R 582. A round-trip fare right now is R 1,205. Depending on the availability and when you book, these fares could change.

  • Score cheap tickets from SNN to OPO by booking at least six months ahead. According to our research, that's the sweet spot for bagging a bargain.

  • May is the cheapest month for flights from Shannon Airport to Porto Airport. If you'd like to travel at a different time of year, the 'Whole month' tool will give you the lowest prices for each month.

  • Landing cheap flights from SNN to OPO is a cinch with Price Alerts. Simply set up one of these automatic alerts and we'll get in touch when fares go down.

  • Tailor your flights with filters. Choose your preferred arrival and departure times, total journey duration and airlines. You can also sort results by 'Fastest,' 'Best' or 'Cheapest' flights from Shannon Airport to Porto Airport.

Handy information about Shannon Airport (SNN)

  • Of the departures from Shannon Airport, 66.14% land on time at their destination.

  • Shannon Airport is about 5 kilometres from central Shannon. If you're ride-sharing, catching a cab or driving from the centre, it'll take 5 minutes or so to get there, depending on the traffic.

  • Catching public transport? You can expect a journey time of around 10 minutes.

  • Get your holiday off to a leisurely start by staying near SNN. Whether you have an early flight from Shannon Airport to Porto Airport or just don't want to be rushed, these hotels are ideal:

Arriving at Porto Airport (OPO)

Getting from Porto Airport (OPO) to central Porto

  • From Porto Airport, Porto is approximately 16 kilometres away. It takes around 20 minutes to drive to the centre.

  • It'll take around 50 minutes if you're travelling by public transport.

When to fly to Porto Airport (OPO)

  • August is the busiest month for flights from Shannon Airport to Porto Airport. To skip the crowds, visit Porto in January.

  • The warmest month in Porto is August, with the temperature ranging between 14ºC (57ºF) and 32ºC (90ºF). Lock in your flights from Shannon Airport to Porto Airport in this month if this is the type of weather you like.

  • Look for cheap tickets from SNN to OPO in January if you want to travel in cooler conditions. Temperatures are at their lowest around then, ranging between 3ºC (37ºF) and 14ºC (57ºF) on average.

Explore more of Portugal

  • You've done Porto, now it's time to discover other parts of Portugal. Travel about 274 kilometres south to Lisbon to tick off its must-visit sights. From Torre de Belem Garden to Estrela At Lisbon - Tram 28 and Archaeological museum of Sao Jorge Castle, you'll have a full itinerary ahead.

  • If you're ready to explore another well-known destination in Portugal, consider Amadora, about 274 kilometres south of Porto. Jardim Porta do Viveiro Alfragide, Jardim Caracol do Victor Alfragide and Jardim e estatua Eduardo Jorge are the start of reasons to visit.

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