I have a reservation (LHR to LAX), which is a Spanair ticket issued for travel on Air New Zealand.

I contacted Air New Zealand in Spain for reticketing and they told me Air New Zealand is not honoring Spanair tickets, because it's an expensive flight.

I have to say I have another reservation (Spanair ticket) for travel on Lufthansa in Business class from Bilbao to Miami that has been honored as originally ticketed, and other airlines like Continental, United and Singapore Airlines are honoring those tickets as well. I don't understand these differences between parters... I think we all must learn from this...