If you aren’t able to travel during the month of July, then book flights to Porto from India during October instead. Flights to Porto in October, while not as cheap as those in July, still average around ₹ 57,192.
The cheapest day to depart from India to Porto is on a Tuesday. Travellers who choose to depart for Porto on a Tuesday will often find tickets for as low as ₹ 48,071. Flights from India to Porto on a Saturday will generally be more expensive and average around ₹ 83,991. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.