Hello All!
Trying to book my parents a trip to india for Jan - March 2016. Our routing/segents will be:
1) YOW-EWR (ua)
2)EWR-BOM (UA)
3)BOM-DEL (AI or Jet Airways)
4)DEL-YYZ (AC)
5)YYZ-YOW (AC)

my parents will be travelling with 2 pieces of luggage each which is ok for the outbound to india and inbound to canada flights. However, for the internal flight fro BOM-DEL the luggage allowance for economy is only 1 bag at 15kg for both carriers (AI and Jet). for both carriers, I see an option to pay for additional luggage per kg but cant find an option to buy an additional bag.

Can anyone advise what the best and most cost effective way is to book this ticket to allow for 2 pieces of luggage?
thanks