An American Airlines flight traveling from New York to New Delhi was diverted to Rome Sunday due to a bomb threat, according to a source familiar with the situation.

An American Airlines flight from New York to New Delhi was diverted to Rome on Sunday due to a security concern later determined to be "non-credible," the airline said, adding the flight landed safely in Rome and will depart for Delhi on Monday.

What differentiates service on one domestic airline from that of its rivals? In recent years, the industry has seen some outliers shift their practices, as Southwest Airlines recently did by ending its policy of open seating.

American Airlines flight passes for Wi-Fi can often cost more than $20, but some fliers will soon get it for free.