Yes. 2x 1 hour flights a day is ideal, max 3, only on the odd occasion.
First, check that the school you fly with in the USA is approved by EASA, or the training you do there won't count towards a Licence issued in the UK.
Will this be just a one-off 2 days, or a regular thing?
The reason I ask is that, although doing the first 5 hours in the USA, then the rest back home should work fine, alternating back and forth between two schools will not be practical.
Also, post 9/11, there are lots of Security, and Visa hoops before you will be allowed to train in the USA, and most of them will need to be jumped through before you travel there. Any US School training foreign nationals will be able to help and advise on this.
MJ