American Airlines is losing more luggage than any other US airline, according to data released by the US Department of Transportation.

Baggage handling is especially poor on AA flights which pass through Philadelphia International Airport, the Philadelphia Inquirer reports.

In June 2019, the airline lost bags at a rate of 11 per 1,000 passengers boarded, the worst rate among the ten largest US airlines.

Overall, American Airlines consistently ranks poorly in lost baggage reports released by the US Department of Transportation.

The problem is especially acute in Philadelphia, a major hub for American Airlines, which accounts for 70 per cent of traffic at the airport. At PHL, American mishandled 20 bags per 1,000 boarded in June, and 15 per 1,000 overall in 2019 so far.

That included an incident in August where the airline lost all of the bags on a flight from Atlanta to Philadelphia. The bags were eventually found and delivered to travellers the following day.

In June, American checked 10.6 million bags, but mishandled more than twice as many of Southwest Airlines, which checked 10.9 million bags the same month.,