Originally Posted by
Knobbgb
The golden rule is - never book a return ticket with A3 (unless it's a same-day turnaround). It's never any cheaper and you lose some flexibility.
Since these must be in Flex, maybe you could change your outbound flight if you really want use a voucher for the return.
I actually checked, and booking the flights as 2 one-way flights would have cost about 20 Eur per leg more !
And changing the outbound flight would also be considerably more expensive (that's why I took the Swiss flight in the first place, as I normally try to avoid code shares)