'Check into' OR 'check in to' OR 'check in at'

English as a Second Language English Vocabulary, Grammar and Idioms
1

Hi,

Please tell me what is the difference betwwen:

What do you usually do when you check into a hotel?

and:

What do you usually do when you check in to a hotel?

and:

What do you usually do when you check in at a hotel?

Thanks
Khanh

2

.
No difference in meaning, and all three forms get gazillions of hits by Ms Google.
.

3

Thank you, Mr. Micawber!

Subsequest to the discussion, could you please tell us which one of the following expressions is correct?

1- He checked out of the hotel yesterday.
2- He checked out the hotel yesterday.
3- He checked out from the hotel yesterday.

Tom