^ Yup.
Also if you plan on changing any flights, or you need flexibility at all, then definitely rethink on STA, they are a fucking mess when it comes to changing anything, and they can rip you off good and proper, with quite high charges for each flight changed. Generally, they're quite good though, and they get stuff sorted all in one go, but if you're trying to save money or want flexibility then buying flights abroad, direct from airlines and online as you go is easier in some ways.
I'm sure there's been price increases, but if you're going anywhere in South East Asia, then buying flights in Bangkok, Singapore or where ever will generally work out cheaper than buying from the U.K, you save some on the tax at least I think....
Shit i'd like to go to South America some time (I have the voice of this Chilean dude stuck in my head going "mannnnn, the wine, the food, the WEEEEEEMEENNNNN" :D) but i'd want to feel pretty confident with speaking Spanish, before hand.