As per
Lot Polish Airlines Cancellation Policy 24 hours. Any flight ticket through Lot Polish Airlines can be canceled within 24 hours of purchase and a full refund will be given if the flight is reassigned at least seven days later. This applies to all types of tickets, even those that are not refundable. Depending on the duration of your ticket, you may be charged a cancellation fee if you are considering your ticket more than 24 hours after booking or seven days before departure.
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