Originally Posted by alect
I looked into this last year as part of a RTW. The requirement to use coupons in the order they appear is in the standard IATA ticket rules (on paper tickets anyway) and not part of the fare rules necessarily.
On the other hand, enforcement of this rule can be varying - I got away with it on my ticket at that time as the BA agent at LAX just tore them out as I wanted to travel them.
I know an agent that does this rather slyly. He added transits so that each half of my journey would fill one ticket.
Karachi - Montreal Return Fare:
Ticket 1 Karachi - Dubai - London - toronto - Montreal
Ticket 2 Montreal - Toronto - London - Dubai - Karachi
since the tickets were separate and it was full fare business class i had no problems using the YUL-KHI part first.
However the ticket I am looking at now is only 4 segments total.
Cheers