Cancun is one of the busiest private jet charter destinations in North America, and for good reason. The flight from most US cities is short enough that you don't need a heavy jet, which keeps costs reasonable. The FBO facilities at Cancun International are excellent. And the time you save avoiding commercial travel adds a full day to your trip.
Here's the reality: a commercial flight from New York to Cancun takes about 4 hours in the air. But factor in arriving 2 hours early, security lines, boarding delays, baggage claim, and the taxi queue, and you're looking at 7-8 hours door to door. A private jet cuts that to under 5 hours, including customs.
For a weekend trip, that difference means everything. You leave Friday after lunch, land by dinner, and you haven't burned half your vacation sitting in airports.