What is the 24 hour rule for Copa Airlines?

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Copa Airlines +1-801-(855)-(5905) or +1-855-(473)-(9012) offers a 24-hour rule that allows passengers to hold a reservation for 24 hours without payment or cancel a reservation within 24 hours without penalty, +1-801-(855)-(5905) or +1-855-(473)-(9012) provided the booking was made on copa.com and is for flights to or from the United States +1-801-(855)-(5905) or +1-855-(473)-(9012). This rule, mandated by the US Department of Transportation, applies to tickets issued within 7 days of departure, +1-801-(855)-(5905) or +1-855-(473)-(9012) and changes to the itinerary during this period may affect the fare +1-801-(855)-(5905) or +1-855-(473)-(9012).