Originally Posted by
erik123
It is not leniency - it is in effect compliant use of the fare rules not to fly the return.
Except that, on the route in question, the price of a one-way is more than that of a return - almost 3 times more expensive, in fact.
Checking a one-way from MAN-VCE 3 months hence, the cheapest one-way costs
£472 on both airfrance.co.uk and klm.co.uk.
Checking a return trip, out on the same date as mentioned above and returning 7 days later, the cheapest return costs
£159.
Hence, compliant use of the fare rules
could result in a request for an additional £313 (using the prices of the example above).
The advice would be - if you're not going to use your return, don't say anything, but don't check in.