... but even if it was are there any caveats or things that you need to watch out for?
Mmm. Its an excellent question. I've never done this before. Its amazing the new thought patterns that start to emerge once you'd frequented these forums for a while.
So, in recent times, been trying hard to think outside the square and find the best way to several south pacific and south east Asian destinations:
The examples below seem common, and the more I search about the more I realise I need to start to think about how I can feel comfortable in booking two one-way tickets rather than one return:
coughet,
PER-HKT, MH, J, $2752 one way
yet
HKT-PER, MH, J, $1490, one way.
TOTAL as two one way tickets = $4242
The return price PER-HKT-PER MH, J is $4330
$88 difference.
Return price HKT-PER-HKT, MH, J, $2764
$1566 difference.
====
Fiji,
PER-NAN, QF / FJ, J, $1532 one way
but
NAN-PER, QF / FJ, J, $890 one way
TOTAL as two one way tickets = $2422
The return price PER-NAN-PER QF/ FJ, J is $2842
$420 difference
Return price NAN-PER-NAN, QF / FJ, J, $1739
$1103 difference.
PER-NAN-PER QF/FJ return in Y class is $1211
The thought seriously occurs that getting out of Australia on the cheapest tickets possible and then booking a separate ticket from that stepping stone (be it SIN or KUL or whatever) on to your final destination is the way to go. Likewise, one way flights back home in J for only a little bit more than the Australian price of the equivalent Y ticket - almost always on the same plane/flight number (what the??!!)
So, per the OP, for those that do this all the time, what are the caveats? I presume for the most part you just turn up at the airport for your return one way journey, pick up your prebooked ticket and life is easy ... or am I kidding myself?