August is the cheapest month to fly this route, with average fares around $791 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $967 | $867 | Peak | |
| June 2026 | $877 | $784 | ||
| July 2026 | $820 | $687 | ||
| August 2026 | $791 | $724 | Best |
Departing on Monday offers the lowest average fares at $825. Thursday departures are the most expensive at $911, a difference of $86.
The best time to fly is August. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from New York to Lisbon is August, with average round-trip fares around $791. The lowest fare found in August is $724.
Monday departures are the cheapest, averaging $825 round trip. The most expensive day is Thursday at $911.
Based on current pricing trends, booking for August travel offers the best value. Avoid May if possible, as fares average $967 compared to $791 in the cheapest month. June is a solid middle-ground option at $877.
Flying in August instead of May can save you approximately $176 per round trip. The cheapest month averages $791 while the most expensive averages $967.
Airlines, flight times, price calendar, and more for New York to Lisbon
View JFK → LIS Details