In general when looking for the cheapest flight to Lisbon, try to book your flight during the month of January for the best deal.
In general, most flyers find the cheapest time to book a flight to Lisbon is about 60 days prior.
In general, booking your departure to Lisbon for a Tuesday represents the best deal on airfare. Try to avoid a Friday departure to stay away from the highest prices.
Our data shows that the cheapest Lisbon flights are usually those with afternoon departure times. midday flights are often costlier.