Originally Posted by
rabbitman
I am thinking of clause 3c5):
"3c5) While some changes to your transportation will not result in a change of fare, others, such as changing the place of departure (for example, because you have not used the first flight coupon in your ticket or you have reversed the direction of your travel) may result in a fare increase. Many fares are valid only for travel on the dates and for the flights shown on the ticket. You may not be able to change these at all or only if you pay us an extra fee to do so."
Not sure this impacts additional sectors. I would interpret this as referring just to changes to an existing ticketed set of flights. Eg if I go LIS-LHR-JFK-LHR-LIS it costs x, if I don't use the first coupon then the remaining routing will cost rather more than x. If I do LHR-CDG-LHR-CDG-LHR a few times, then (I guess) the fare will be different according to where I start, so if a change means I am starting in France instead of in the UK (e.g. changing an LHR-CDG-LHR for a CDG-LHR-CDG) it could cost less.