Long time lurker, first time poster: trying to book flights for my London-based parents, whom I haven't seen in 2 years (!), from LHR-SFO, July 28-August 26. I see that Virgin keeps selling these flights and then canceling them. In the event they cancel, what are our options? Are we just SOL and have to buy new tickets on UA/BA at the last minute? Or will they fly my folks to, say LAX, and then on a DL flight from there to SFO? Hard to tell from the language about re-protection what happens with flat out cancellation of a schedule. Any help/advice gratefully received!
Re-protection normally means that VS would offer you an earlier / later direct flight on the same day (if available). Or, they could offer you direct flights on earlier / later dates to those originally booked. If any changes VS propose are not suitable, they are normally amenable to consider any reasonable re-route suggestion you make with regards to flying indirect - especially if Delta operate the route you need for the internal US flight.
In the case of a LHR-SFO flight, LHR-LAX-SFO would seem like a perfectly reasonable suggestion, as would connecting via JFK, BOS or ATL - all airports where Delta have a very significant presence.