PHL/SJU. I think this is the first time I have booked this plane but a strange configuration. First class has 1 2 1 seats across and economy has 2 4 2 seats across. I couldn’t figure out how my seats were C and F and together until I pulled the diagram.
Check out Seat Guru (www.seatguru.com) for airlines seating configurations and tips on seats to avoid. I once had a seating issue on a long flight, so I always double check with this site before locking in on seats.