Originally Posted by dsgtc0408

Hi, thought I'd revisit this as it seems you didn't get a response.

Interlining is a two part thing. One aspect is the ability to issue a ticket that combines flights between airlines. Another is the ability for two different carriers to hand off luggage between each other per a particular traveler's itinerary. Although alliances are helpful in ensuring such cooperation (and more), in truth almost (key word is almost) all major airlines have interline cooperation agreements with each other. I think (although I may be wrong so please correct me) that IATA member airlines in principle will interline with each other although there may be reasons why this cooperation might be limited.

The point I am trying to make is that interlining ideally goes across alliance boundaries. Of course, the smart thing to do is to ask the airline or your travel agent whether interlining exists between two airlines or not, then decide accordingly.

Originally Posted by dsgtc0408

True in principle but with all due respect the OP is traveling for nearly three weeks. That's a long time have to be away from home and potentially washing out clothing by hand in hotel washbasins because he is traveling with carry on bags only. Additionally the OP is spending a lot of time in BOM; if he's visiting family, he might be playing Santa Claus and needing to carry a sleigh's worth of gifts that could only go as checked baggage.