Cheapest return flights from London to Porto Alegre in September from $1138
AirHint found the following cheapest return flights from London (LHR) to Porto Alegre (POA) in September 2025 (see full year).
Return flights
| 11 Sep - 26 Sep | Vueling Airlines | ||
| 11 Sep - 22 Sep | Virgin Atlantic | ||
| 08 Sep - 22 Sep | Virgin Atlantic | ||
| 10 Sep - 22 Sep | Virgin Atlantic | ||
| 17 Sep - 24 Sep | Virgin Atlantic |
Also check the deals for one-way flights from London to Porto Alegre in September.
The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
