You already know that you simply got to book aviation a minimum of a fortnight ago to urge the simplest rates. Also, if you include your stay on a Saturday trip, you would possibly be ready to get a lower ticket price, but canceling an airplane ticket may be a headache and may be expensive, so plan your trip.
This is not necessarily a nasty thing, but keep in mind that travel booking sites may have to pay a touch of the value of the first ticket, as trying to use the coupon can deduct exchange rates. Please note that travel booking sites will offer discounted rates thanks to volume, therefore the Copa Airlines cancellation policy is extremely strict.