When someone wins a trip in a sweepstakes or contest, they usually expect that the prize will be for two people so they can bring a travel companion along on their journey. If your promotion requires winners to fly solo, you need to make that very clear in the rules and any accompanying advertisements or other promotions. It needs to be very conspicuous that the trip is only for the winner.
Assuming your prize does include a travel companion, you need to be aware of several issues. First, the minimum required age for the companion is important. If the person accompanying ...