Hi Friends,
I am planning to buy a multi-city flight ticket for my wife from San Franciso to Chenna (First leg), and then Chennai to Toronto (2nd leg). But I do not know exactly when my would be able to take the second leg as she does not have the visa for Canada.
1. Is there any way I can buy a multi-city flight ticker with open ended 2nd leg dates?
2. How about buying multi-city ticket with a specified date for the second leg and change the date later.
3. Any travel insurance to cover the change of ticket date changes.

I am planning to buy it online (Priceline or Expedia).
Thanks in-advance.