Air travel is easier and more accessible than ever - but passenger complaints are also on the rise.
According to AQR's annual quality report for the aviation industry, airline passenger complaints jumped by 37 per cent since 2014.
Despite this, the report also shows that airlines had made considerable progress each year when it came to punctuality, baggage handling, involuntary denied boardings and other metrics.
The report looks at parameters like oversold flights, delays, lost luggage, refund policies and customer service for 13 major US airlines.
This year showed minor improvements, with the overall AQR score rising from -1.24 to -1.21.