Passengers on a Jetstar plane from Bangkok to Melbourne are "desperate to get home" after their flight was cancelled two days in a row, leaving them "abandoned" in the Thai capital.

Two separate engineering problems on the plane caused the delays of more than 40 hours, which have left one passenger distraught after missing her Australian citizenship ceremony and another missing her chance to see the Australian Open.

Others are simply exhausted after spending hours waiting in the plane on two different occasions, then waiting hours to retrieve their luggage before heading back to their hotels.

Many passengers have barely slept with back and forward trips between the airport and hotels continuing until the early hours of the morning.