Thread: How good is ZED Light when it comes to swapping airlines?

Originally Posted by qxramper

So lets say i have a ZL on DL from NRT-SEA. I could use This same ticket on UA NRT-SEA Because our agreements with them are also ZL?

That's an easy one: since both accept ZL, and the route is the same, that's a definite YES.

Even if the route would not be exactly the same, but within the same milage zone, the answer should be YES.

My question is what UA would do if they'd only have a ZM agreement in place with your airline, whereas DL has the ZL and you try to board the UA plane with your ZL ticket, originally intended for use on DL. I've heart from people that they got on the plane of a ZM carrier with a ZL ticket without problems, but then others have told me this is not possible, so I'd like to know what are the rules on this, and how 'flexible' they are in real world...