In general, August is the cheapest month to fly from Ireland to Porto. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around 92€. If you are unable to visit Porto during the month of August, then departing from Ireland during the month October is also very affordable. Most momondo users find prices during this month for around 92€.
Most flyers found that booking tickets 59 days in advance of their planned departure date is the best time to get cheap flights to Porto. During this timeframe, flight prices are around 120€. Keep in mind that you might be able to find cheaper flights to Porto at any time. In fact, our users found flights for as low as 53€ in the past 72 hours.
The cheapest day to depart on your flight to Porto is on a Tuesday when prices can be found for as low as 82€. This is often the case because there is less demand to fly during this day of the week. On the other hand, Friday is the most expensive day to depart from Ireland because it is more convenient for both business and leisure travellers. As a result, prices tend to be around 151€.
The cheapest time of day to fly to Porto is in the evening when flights can be purchased for as low as 107€. In contrast, the most expensive time of day to depart to Porto is at midday when prices are around 125€.