They've always made the flight. But they cost a lot. Up $80 depending on who you deal with at the counter and what side of the bed they woke up on.
Keep in mind in this day and age the airline inspectors are going to open it to check it, depending on the airport. So careful how you pack it. Don't lock it or they'll cut them -- which has happened to me. Hopefully you can watch.
Nowadays I ship them Fed-X ground which is by far the cheapest. Way less than UPS. Easy to find the stores since they hooked up with Kinkos. $26 bucks one way from TX to AZ over the holiday. All you need is an address, can send them to a private residence. Tougher on vacation. But your hotel might accept it, can also look for an area bike shop.
I've had trouble with the clasps on this box but Performance has always been helpful. Never any problems with the bikes (I have two cases). I've shipped and flown with these cases a couple times a year. Worst with shipping is being without a bike for 5 days before you leave. But that's just extra reason to have more bikes.
Afterall:
b = n + 1
Whereas b = ideal number of bikes
n = number of bikes owned