Not really sure but maybe they should check with the airline on the web page....when my husband and I went to America in July we flew via Paris on Air France...this is what they let us take on board as hand or carry on:
1 standard baggage item that respects the following maximum dimensions:
55 cm (l) x 35 cm (w) x 25 cm (h) – including pockets, wheels, and handles
Please note: (1 suit bag is considered a standard bag)
1 accessory (handbag, notebook computer, camera, etc.)
Maximum total weight (standard baggage + accessory): 12 kg/26.5 lb
This was leaving from Heathrow to Paris to Salt Lake City then the opposite coming back...
I think it really depends on the airlines in the end....sorry was not to much help for you