Cheap flights from Ireland to Porto from €23

The cheapest month to fly to Porto from Ireland is in March. Flight prices, which tend to average around €42, are often lower during this time because this is during the off-season. If you are unable to visit Porto during the month of March, then departing from Ireland during the month November is also very affordable. Most momondo users find prices during this month for around €57.

The cheapest day to depart from Ireland to Porto is on a Tuesday when prices can be found for as low as €182. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Ireland to Porto for around €239.

Our data shows that the cheapest Ireland to Porto flights are usually those with departure times in the morning. Our users have found flights to Porto in the morning for as low as €149. Flights to Porto are more costly in the afternoon, with an average ticket price of €203. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Shannon to Porto for the best Ireland - Porto flight prices

You are more likely to see cheaper flights to Porto from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around €192 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Ireland for as low as €141 on momondo.

There is only 1 cabin class available to choose from on Ireland to Porto flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Historically, on average around 30% of flights between Ireland and Porto have experienced a delay on any given week. The average delay length over the past 12 months has been 117 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Friday has historically seen more delays on average compared to the rest of the week.

According to our data, Ryanair have had the fewest delays on this route over the last 12 months, with about 30% of their flights experiencing any sort of delay.

As of July 2026, 4 flights take off from Ireland and land in Porto each week. The most common flight departure day for this route is Wed, with 50% of weekly flights taking off on this day.

On average, it takes 2h 15m to fly from Ireland to Porto if you fly out of Shannon (the most popular airport in Ireland) and into Porto (the most popular airport in Porto). If you’re flying out of Dublin and into Porto, then the flight time is around 2h 25m.