I bought a round-trip flight with KLM from Amsterdam to Toronto and already used the first part of the ticket to arrive to the destination. The ticket is not refundable. Now my plans have changed and I don't want to fly back.
I remember when I was buying the ticket, a one-way flight was twice as expensive. So I'm fine with not getting any refund back for the second half.
What would be the best thing to do?
If I cancel the ticket (there is a cancellation fee), will they charge me extra for the price difference of one-way ticket plus cancellation fee?
If I don't show up, are they going to charge extra for the price difference? In this case, is it better not to check-in?