First post here, so sorry if it is not the right spot or sort of topic... I have been at least silver elite every year since 2001, have 35,000 + EQM this year, so I fly a bit, but not as much or often as many of you. I have noticed a change, it seems, on some flights out of IAH as they go north. It seems speed and altitude are kept low for quite some time (10 minutes or so, according to Flight Tracker). First time I thought it could be weather related (flight to OMA in Sept), but it happened again Sunday on a trip to LAS with a clear sky. Must be some sort of control or noise thing??? Anyone else notice or know why?

Again, apologies if this is too far off topic for the forum.