Im trying to book a flight from BOM-MAD return for 12-Jan onward and 07-Mar return, the cheapest options were with 9W,AF. I got a routing via CDG, India - France operated by 9W and CDG-MAD operated by AF. The baggage allowance is 1 bag and Id like to purchase another bag. I called AF they told me to call 9W. I called 9W they told me I can only do this at the airport abd they cant tell me the charges in advance. Any ideas on whay the cost could be? Thanks in advance!