We purchased tickets to Cancun 4 months prior to trip because we wanted a DIRECT flight. Two months prior to trip USA 3000 contacted us and said the flight home changed and would depart ~6 hours earlier. They said we could accept the change or they would issue us a refund. We accepted the change. We had to arrange for our 10y.o. to travel and stay with family during our trip to Cancun. I made travel arrangements that worked around the USA 3000 flight, I had to rearrange the 10y.o.'s flight because of the change to the USA return schedule. 2 weeks prior to our flight to Cancun, USA 3000 called again, and again the flight home was changed. there was now a 5 hour overlay in Philidelphia (no longer a direct flight) and we would be home late in the evening. I contacted them and they said we could either accept the change or pay a $150 per ticket cancellation fee. I explained the situtation, how this was their second schedule change, and that we had to be at home to meet our 10 y.o.'s flight. I asked for a refund, they said they did not have a refund policy in place at this time and that my only option was to cancel and pay the cancellation fee, and I would not get any credit for the tickets purchase price (over $1400 for 2 tickets). I spoke with 2 people at USA 3000 and they told me the same thing. I will never fly with them again, and I highly suggest you understand their policies prior to purchasing your tickets. We used the Credit Card company to force a refund.