Apparently they are good for anywhere Kingfisher flies. Am I reading that right? I see nothing that says they are restricted to domestic segments. The T&Cs even mention 2-piece concept on flights to/from the US (which they don't fly to )
Might be worth trying - these look like they are fully refundable with only a 1000 INR penalty. And they're also transferable.
Largely identical to the one-pass program that 9W has, except for (a) refund, though I've known of cases where Jet allows refunds and (b) transferability - cannot on 9W, unless it is a corporate pass.
Yes, they are good for any route, but only a single segment, so I wouldn't necessarily but this, unless I know I have mid-range distances (typically nothing short of a BOM-DEL distance, maybe even more), AND, the flight cost is lower than Rs 15k, Rs 7.2k or Rs 3.5k respectively, per segment. Also, how desperate is your need to fly KF? For most sectors, those fare numbers (unless you're focussed on KF First) are quite high, compared to other LCCs. You might even get KF online bookings for lower, in real time.