Landing in SFO later this week with BA, and connecting on a TP run with AA for the next 24 hrs: SFO - LAX - MIA - CUN - MIA - LAS. Once in Las Vegas the next evening, staying there overnight.

But I have three questions for people who have done these mad things before:

1) Under the Advance Passenger Information part of the BA website, do I put my onward flight number to LAX, or do I put the name & address of the hotel in Las Vegas we'll be at the next day?

2) Also, last year when I was in the US, I completed the Electronic System for Travel Authorisation (ESTA) form online - giving me multiple entries into the US for the next 2 years. Do I now have to update that with my new destination, or can you leave it be? My colleague has been to the US multiple times since and never updated his - but is that right? I want a smooth journey!

3) And finally, what have people on TP runs told immigration in the past when they have questioned you weird scheduling. Especially arriving in the US, then going to Mexico for 3 hours, and back again, via multiple airports? I guess you have to be honest about it, and put up with them thinking you are a complete and utter tw*t?

Thanks !

747_not_777