July 03 (Sunday) DL 95 BCN-JFK was apparently aiming for BOS right out of the departure gate due to crew rest/duty issues, but ending up putting down in Bangor, Maine. The flight spent only an hour in BGR where apparently a fresh crew was flown up to meet the flight and continue onward to JFK. Apparently the crew was flown up to BGR on an otherwise empty B737.
I am not sure of the many details, but apparently this flight was dispatched from BCN with only 2 pilots instead of the usual 3, limiting the length of the flight to 8 hours according to duty/rest regs and rules.

Perhaps those with access to DL computers could shed more light on this interesting saga. Pulling up short on a trans-Atlantic flight because of crew rest rules (if that is in fact the case) would be a new one for me!