a friend of mine wants to lock down two still relatively cheap ex-africa rtw tickets, and we want to book the 2nd start date as late as possible. as for today, we can book our first flight on the August 9th, 2017. we were wondering if we can push the first flight further down the road when other dates start getting available?
if so, would you be able to push a trip indefinitely? feels weird if you could, but on the other hand there is no downside to the airlines.