I use a North Defender bag when travelling overseas. Its marked on the outside as 'North Golf', and in the US as with a number of other countries, golf equipment doesn't attract a oversize luggage fee, like board bags do. Eg I flew Syd->LA->Miami->Bahamas, so thats 6 legs (broken up) that could have been $75 per leg with American Airlines. Bag paid for itself.
Mine has worn slightly when i took it to the Maldives, as the dragged it on its side rather than the wheels. so not as hard wearing as i'd like for a airline travel bag.
Room for my 2 Vemons, 142tt and harness, impact vest, helmet etc. I wouldn't use the external bar section on the flight legs but it is good when comming off the beach as it has a mesh section to let it dry out.