Originally Posted by Viajero
I wasn't aware of the "whichever comes first" part of the rule. I thought that I could take *any* flight within the 24 hr window. Are you saying that if there are, say two flights available, both within the 24 hr period, I *have* to take the first one?. That kind of kills an itin I was planning.

For paid tickets you can take any flight within 24 hours, your choice, and it is still not a stopover. For award tickets the rules vary by type of award and airline, but usually it must be the first available flight to remain a transit and not become a stopover (this is a recent change in rule for some awards).