TAP Air Portugal is extending its free Stopover Program to five days in Lisbon and Porto this fall.

The longer version of the program, which was launched last summer with a three-day stopover option, is available starting in September. Also starting next month, stopover passengers will be able to travel from one destination and return from another.

For example, a passenger who flies to Barcelona and returns from Seville will qualify for a stopover in Lisbon or Porto on the outbound or return travel. Stopover visits are now also available on one-way travel to Europe or Africa; previously round-trip travel was necessary to qualify for the program.

In February, TAP added several Portugal areas as destinations which qualify for the stopover, including the Algarve, Madeira and the Azores. Travelers can now visit Lisbon or Porto for up to five days en route to Faro, Ponta Delgada, Terceira, Funchal and Porto Santo for no extra airfare.