June is the cheapest month to fly this route, with average fares around $141 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $233 | $126 | Peak | |
| June 2026 | $141 | $89 | Best | |
| July 2026 | $179 | $92 | ||
| August 2026 | $198 | $189 |
Departing on Tuesday offers the lowest average fares at $149. Friday departures are the most expensive at $209, a difference of $60.
The best time to fly is June. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from London to Lisbon is June, with average round-trip fares around $141. The lowest fare found in June is $89.
Tuesday departures are the cheapest, averaging $149 round trip. The most expensive day is Friday at $209.
Based on current pricing trends, booking for June travel offers the best value. Avoid May if possible, as fares average $233 compared to $141 in the cheapest month. August is a solid middle-ground option at $198.
Flying in June instead of May can save you approximately $92 per round trip. The cheapest month averages $141 while the most expensive averages $233.
Airlines, flight times, price calendar, and more for London to Lisbon
View LHR → LIS Details