This hasn't worked for me in a few months, either via SMS or email. I get confirmations but nothing else.

Even before it stopped working, when flights were on time it would say "departing on time at" then provide no flight time.

I wish that:

• this feature worked
• there was a setting on one's ac.com profile to enable notification automatically on all flights
• failing that, one could register for all flight segments when booking on ac.com