Remember you are only allowed a "suitcase" - that being a SMALL suitcase and a "personal item", that being perhaps a laptop case when you carry luggage on any airplane. In packing remember to be considerate of the other passengers when it comes to overhead space and that the "personal item", i.e, the laptop case, goes under the seat in front of you.

That said, I used to do 3 weeks in 2 carry-on bags but there was no laptop involved back then.