do Air Sunshine and USAir code share? We have had a very tight connection with Cape Air being a separate booking but that was because of the checked bags. It was going to the BVI, At the time I think we were on UsAirways, we had an hour and a half which we thought was fine, but Rex had to go outside of security to get the bags to recheck them on the Cape Air flight. Gathering the bags and re-doing security took easily an hour so making the 1/2 Cape Air check in was crazy, thankfully we stayed in the airport to let them know he was in the airport and on his way. As long as the flights are on time and you have carry on you would be fine. If you do have checked bags send someone ahead just in case.