In the last year or so, the rules for xONEx's changed to include surface segments(/open jaws) in the 20 segment limit.
This has led to an issue regarding co-terminals where some
oneworld member airlines consider the use of co-terminals to be a surface segment while others do not.
e.g. I know one airline considers the following route to be 6 segments, while another believes it to be 4 only:
- ORD-LHR,LGW-DBV-LGW,xLHR-SIN
Note, that while the first airline believes it to be six, they consider no UK APD is payable for
DBV-LGA,xLHR-SIN.
Can you please shed some light on which interpretation is the correct one?