Charlie slept in a bunch of different hotels/sublets when we were getting our apartment treated for bed bugs (8 months) and then mold (13 months). He slept like a champ.
Then we took our first flight to la when he was 12 months. The flights weren't as bad as I expected, but his sleep was off before we even left for the trip due to a recent respiratory virus. His sleep was not great in LA because of the time change, and he started waking up in the middle of the night which he hadn't done since sleep training. it took awhile to get back on track once we got home because he got sick again.
How old was your LO when they first slept away from home or took a flight? How did they do?