First of all, I want to say hello and thanks to all the info here. I'm an occasional poster on BA flyer talk but don't think I've ever posted here on Iberia.

I have a flight from Madrid to Munich that is due to land at 2155 tonight. I would love to be able to get the 2230 from MAD to ALC but it was not available to purchase as a single ticket.

My question is this: If the plane lands on time, is there anything to stop me buying an avios flight as we're taxiing to the gate (if they are still available) and hopping on to the Alicante flight? Currently there is avios availability.

I mean, would there be any issue with conformance, or something similar? Or if I buy the ticket, check in and download the pass to my phone in time to get to the gate 20 minutes before the flight, would I be good to go.

I know there are a lot of ifs in there