Except in the case of Basic Fare booking, all fares are cancelled by the passengers up to one hour prior to the scheduled departure of the booking associated with the fare rules, provided that the following Porter Airlines cancellation policy will apply –

As per Porter Airlines cancellation rules, passengers are not allowed to cancel the Basic fare at any time, except within 24 hours of the date of purchase
As per Porter Airlines ticket cancellation policy, the standard fares are non-refundable and is subject to a 100 USD cancellation fee per passenger per direction, except where the passenger request a cancellation at the airport on the date of the scheduled departure, in which case Porter Airlines cancellation fee would be 200 USD per passenger per direction applies.
As per Porter Airlines refund policy, Flexible fares shall be non-refundable and is subject to a 155 USD cancellation fee per passenger per direction, except where the passenger request a cancellation at the airport on the date of the scheduled departure, in which case Porter Airlines cancellation fee would be 255 USD per passenger per direction applies.
To cancel ticket with Porter Airlines, passengers would get in return the future travel credit which remains valid for one year from the date of issuance, where the credit value shall remain equal to the unused portion of the ticket
When redeeming the Porter Airlines cancellation credit towards the future booking, passengers may apply the credit towards the base fare, airline surcharges, Porter Airlines cancel flight fee and government taxes.
Porter Airlines flight cancellation fee is waived when any reservation is cancelled within 24 hours of purchase, provided that the scheduled departure date must be 7 days or more at the time of cancellation.
As per Porter Airlines cancellation policy, for passengers who fail to show up for the flights, and do not otherwise initiate a cancellation, the fare of the unused portion of the ticket remains non-refundable and non-creditable towards future flights under any circumstances.
As per Porter Airlines cancel flight policy, the airline reserve the waive the payment by a passenger of a cancellation fee
Porter Airlines ticket cancellation fee is payable by the passenger and is charged per one-way travel, per person.