Both. US Customs, Immigration and Agriculture pre-clear passengers in Bermuda before boarding flights to the US, so they are treated like domestic passengers when arriving in the US. They must go through normal border controls before boarding the flight, however.
Freight shipped on the same flight will, as far as I am aware, be treated as international freight, having not been pre-cleared in Bermuda.
Passengers flying to Bermuda from the US must clear HM Customs and Bermuda Immigration on arrival.
International.
It is 775 miles from Boston to Bermuda. The average flight time between these two locations is 2 hours and 3 minutes.
If the flight is taken from inside Italy, it would be domestic. If taken from outside the country, it would be international.
LAX to HNL is considered a domestic flight.
The flight distance from Boston, Massachusetts to Bermuda is: 773 miles / 1,244 km
The flight distance from Boston (Logan International Airport) to Vancouver International Airport is about 2,513 miles / 4,045 km
The flight distance from Milwaukee, WI to Boston Logan International Airport is 860 miles.
Quantas does 1400 domestic flights per day and 1605 international.:)
One can book a domestic flight from Detroit to Boston from many places. These many places include the website of popular travel companies such as Delta Air, Continental, or Southwest Airlines.
international airport
The flight time from Logan International Airport to Cancún International Airport is: 3 hours, 28 minutes
"Domestic" means within one country's borders. A flight outside of "domestic" air space becomes an "international" flight. Such flights have many attendant requirements that "domestic" flights lack.