Cheap flights from Portugal to Ireland from €20

The month of February is another great option to travel to Ireland, with average flight prices from Portugal averaging around €31.

The cheapest day to depart on your flight to Ireland is on a Monday when prices can be found for as low as €80. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around €166. These prices are subject to change though, so be sure to set up a Price Alert for flights to Ireland.

In the evening is the cheapest time of day to fly from Portugal to Ireland when you can find flight prices for as low as €132. Flying to Ireland in the evening is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Ireland is in the afternoon when prices are around €219.

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

You are more likely to see cheaper flights to Ireland from Portugal when booking weeks ahead of your departure date. In general, you can expect to find flights to Ireland for around €142 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ireland from Portugal for as low as €105 on momondo.

There is only 1 cabin class available to choose from on Portugal to Ireland 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 25% of flights between Portugal and Ireland have experienced a delay on any given week. The average delay length over the past 12 months has been 112 minutes.

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

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

According to our data, Aer Lingus have had the fewest delays on this route over the last 12 months, with about 16% of their flights experiencing any sort of delay.

As of July 2026, there are 9 flights per day flying from Portugal to Ireland. The most common time of day flights depart is 22:00, with 40% of flights taking off at midday.

As of July 2026, there are 64 flights per week flying from Portugal to Ireland. The most common day of the week flights depart is Tue, with 31% of flights taking off on this day.