Cheap flights from Portugal to Ireland from €19

The month of May 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 €76. 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 Saturday because tickets tend to average around €254. These prices are subject to change though, so be sure to set up a Price Alert for flights to Ireland.

In the morning is the cheapest time of day to fly from Portugal to Ireland when you can find flight prices for as low as €135. Flying to Ireland in the morning 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 evening when prices are around €228.

Fly from Lisbon Humberto Delgado to Dublin 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 €130 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 €96 on momondo.

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 110 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 May 2026, there are 14 flights per day flying from Portugal to Ireland. The most common time of day flights depart is 21:00, with 41% of flights taking off at midday.

As of May 2026, there are 102 flights per week flying from Portugal to Ireland. The most common day of the week flights depart is Fri, with 24% of flights taking off on this day.