Originally Posted by
CPRich
I'm unclear on the logic here. What is "3 months validity"? Do you mean returning within 3 months from departure date - beyond that the fare increases?
Airlines have different rules but currently the cheap fares on MH must be purchased at least 5 days in advance, have availability in O or Q class, be for a minimum stay of one Sunday, and a maximum stay of 3 months. Also the outbound date must not be in peak season (around Easter, Christmas & July/August). If you don't comply with all of these, the fares go way up.
Because 572+100 is cheaper than 728, and a fare increase for the return would affect both the change of the return fare and the future purchase of the one-way flight back, no?
The £572 fare useless because I'm definitely staying over 3 months. So I'm looking at £808 + £100 change fee.
It's possible for the return fare to change but the one-way flight not to, because there are other airlines - if currently it's £300 on MH, and £400 on SQ, but when I want to fly MH has gone to £500, then I would just book SQ.