Originally Posted by ryanbriar

I can’t opine on the Canadian billing address aspect, but SDS (and SDC) is not available on itineraries with international flights (excluding JFK-LHR for SDC) so that is why you weren’t getting any options.

Tickets are changeable over the phone, but if you checked in, the agent would need to reverse that and deal with the rate desk. Perhaps they didn’t want to do that and made up the part about online only.

Frustrating, but it sounds like DL was the better option as it was one stop.