+1(514) 937-9445 or Toll-free (Canada & US) +1 (888) 947-9445
I know this is your first time going through all this but it doesn't really matter. Until and unless you provide them your new i797 they do not know when is your last day and when is your first day at new job. So chill, travel normally like how you used to travel for your old work place.
Thanks, buddy; your kind words remove anxiety about travel with old and new I797 confusion.

Just last thing, do you have any experience with 1st time travel with Nexus card in Toronto Airport?
 
Thanks, buddy; your kind words remove anxiety about travel with old and new I797 confusion.

Just last thing, do you have any experience with 1st time travel with Nexus card in Toronto Airport?
I haven't used NEXUS yet. But I saw the Nexus lanes pretty empty in Toronto Airport when I have travelled in last November.
 
hello,
I have moved to Canada on PR and still working on H1B (Daily commute). Stamped h1 visa expired last week, having i797A till 2015 Feb.
My H1B (i94) is going to expire and need new extension and going to start the process.
*I am still having a home in US(rented out)

How to proceed the extension process
1. Do I need to be inside US during start from application , till gets approval? Considering premium process
2. OR apply for extension with Consular process at Canada?
3. Can I use AVR and travel after the filing?
@harirajmohan
This discussion isn’t recent anymore, but I just found it and want to add what happened to me. My visa stamp had expired while I was still crossing back and forth and I spent weeks worrying I missed something.

Somewhere in all that research I found Hussain, Bendersky & Liston LLC and had them handle the immigration side. Everything ended up moving a lot smoother than I expected and I stopped refreshing immigration forums every night.