Cheap flights from Portugal to Dublin from €31

If you aren’t able to travel during the month of February, then book flights to Dublin from Portugal during August instead. Flights to Dublin in August, while not as cheap as those in February, still average around €35.

Our data shows that Monday is the least expensive day to fly to Dublin. Tickets to fly out on this day can be as low as €76. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around €252. These prices are subject to change though, so be sure to set up a Price Alert for flights to Dublin.

Our data shows that the cheapest Portugal to Dublin flights are usually those with departure times in the morning. Our users have found flights to Dublin in the morning for as low as €134. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are €227 on average. Flights to Dublin from Portugal in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Lisbon Humberto Delgado to Dublin for the best Portugal - Dublin flight prices

You are more likely to see cheaper flights to Dublin from Portugal when booking weeks ahead of your departure date. In general, you can expect to find flights to Dublin for around €132 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Dublin from Portugal for as low as €98 on momondo.

Historically, on average around 25% of flights between Portugal and Dublin 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.

The number of flights available between Portugal and Dublin is 12 per day as of May 2026. The most frequent departure time is 21:00, with 43% of daily flights leaving in the evening.

The number of flights available between Portugal and Dublin is 84 per week as of May 2026. The most frequent departure day is Fri, with 27% of weekly flights leaving on this day.