Originally Posted by
Mwenenzi
If the UA flight has closed its door without you, UA are likely to consider you a no show. Then it gets very hard to get any value back on the ticket, depending on the ticket t&c's. What will the cost be on new walk up ticket to your destination, with any airline.
That's obviously not true if the airline has a "flat-tire" rule; and it appears that UA does -- unless there has been a recent change.
https://pointmetotheplane.boardingar...hwest-flights/
To the OP: If an airline has a flat-tire rule, it does not matter what airline you are flying in on; in fact, you don't even have to be flying in at all.