If all else fails....why not just buy them tickets? I know we have fares as low as $89 each way from PIT-SNA and we have an average of 4-5 flights per day...if you plan ahead you can get some great fares and they will be guaranteed a seat...nowadays nonreving is becoming harder and harder and it probably won't get any easier in the near future. We also don't charge any fees for changing their itinerary and we offer great senior fares (65+) if they are elegible...if there were my folks, I'd buy them a ticket!