Temps d'escale d'1h30 à Boston et passage à l'immigration

What if my flight is operated by more than one airline?
On 1 April 2011, a new IATA (International Air Transport Association) resolution on baggage allowances took effect for journeys which include more than one carrier on the same ticket.
When your transportation includes more than one airline the baggage allowances are now determined according to which carrier is considered the "most significant carrier" as according to Resolution 302 from IATA. These rules are complex. However, if you are flying with Icelandair, your "most significant carrier" will generally be the airline which flies the longest leg of your trip, or else the airline which takes you on the first international leg of your journey. In some cases, this may mean that the baggage allowance of a carrier other than Icelandair will apply to the whole journey or to some part of it. These rules apply only to checked bags and excess charges on them, and do not apply to carry-on baggage. Customers are encouraged to familiarize themselves with the baggage allowances given in their tickets.Please contact your sales agent for information.

D'accord, merci bien !
Je vais essayer de contacter les compagnies alors. Et pas de soucis pour le vol retour pour l'instant, je n'ai qu'un aller simple puisque je pars pour un an :)