A consumer watchdog has called Air New Zealand credit card surcharges draconian - but how much you pay depends on where you book your tickets.
The Herald on Sunday has been running a campaign against retailers charging excessive credit card fees.
Dozens of readers have written in, many complaining about Air New Zealand.
Air New Zealand charges $4 on all online domestic bookings, $6 on transtasman and Pacific bookings and $17.50 on most international flights - for each one way flight.
A passenger booking a flight to London and opting to stopover in Hong Kong could pay $17.50 twice.