This is a generalization of:
Suppose I'm flying with a certain airline from point A to point C via point B. The maximum luggage allowance on this flight is, say, 2 pieces (never mind the exact weight and dimension limits). At A, I check in 1 piece of such luggage. The plane takes off and puts me in B, where I disembark and go into the airport.
At this point, one of the following happens:
- I purchase a bunch of items in the duty free shops, including, say, a suitcase into which I put them.
- A mysterious stranger somehow hands me a suitcase.
- The airport has a luggage holding service past its security check and passport control area (I'm not sure there are such airports at all in the world), and I have deposited a piece of luggage there at an earlier time.
- A friend of mine on the other side of the security, passport and customs checks walks up to the airline's counter, with a duly signed and notarized letter from me asking that they carry a second piece of luggage.
Let's assume my new suitcase is under the weight & dimension limits, but is too large and/or heavy to be carried on board. Assume also that I don't cross into the sovereign territory, i.e. don't pass passports, security and customs control.
Will I be able to have the airline carry my second piece of luggage from B to C? Or rather, are there combinations of airline, airport and scenarios from the above list for which I'll be able to have my second piece of luggage carried to C?