The promotional campaign will be in effect between October 11 and December 13, 2022 with trips between Porto and Lisbon available for €5.50.

For trips from Lisbon to Aveiro or Faro, the price is €4.50, while from Lisbon to Covilhã or Coimbra it will cost €4.00, the carrier said in a statement.

The prices between Lisbon and Évora and Lisbon and Beja are €2.50 and €3.00, respectively.

"These tickets can be purchased at the Online Ticket Office, on the CP App and on other CP sales channels, at least 10 days in advance of the date of travel", states the company.

Tickets are valid for travel between October 20 and December 22, 2022.