A Delta flight from Maui to Seattle turned back to Honolulu after fumes filled the cabin shortly after takeoff, a scare that ended with only minor injuries.

• Fumes were detected on the Airbus A321neo soon after departure, forcing the pilots to divert to Honolulu.
• Fuel was seen leaking from the plane once it landed.
• Four people were treated for headaches and nausea and taken to the hospital in stable condition.
• The rest of the 189 passengers got off by stairs and were bused to the terminal.
• Delta apologized and rebooked everyone on a new flight the next morning.

Outlook: Delta will face questions about the cause of the fumes and fuel leak, but there is no sign of a wider safety problem for the airline.