Jetstar is the worst airline in the world for frequently having long delays and adding "sneaky" fares to online bookings, according to the results of a new global survey.
More than one in three Jetstar passengers (37.2 per cent) said they've experienced flight delays and the average wait was four hours after the scheduled departure time, according to Daily Mail.
Watchdog Choice and 10 other consumer groups surveyed about 11,000 people from Australia, Belgium, Brazil, Denmark, France, Italy, Portugal and Spain.
Tiger Airways was not included in the survey results because the budget carrier received less than 100 responses and the sample size was too small.
Jetstar received just one star (out of five) for overall satisfaction.
The airline's comfort rating was 4.51 and its website transparency score was 4.81. Jetstar's overall satisfaction rating was 6.01.
A Jetstar spokesperson questioned the accuracy of the survey results.
"There are a lot of holes in this latest Choice survey, including leaving out our main competitor Tiger because they didn't collect enough responses, so the veracity of the report is questionable," the spokesperson told Daily Mail Australia.
The spokesperson said the budget airline was committed to cutting flight delays but would not jeopardise passenger safety.
"Choice seem to enjoy criticising airlines without understanding the safety standards we operate to or recognising the role of low cost carriers in making travel more affordable for millions of Australians.
"We know how important it is to get customers to their destination on time, and we recognise there is room for improvement and our team is doing a lot of work behind the scenes.
"Weather is often the source of delays, particularly in the more tropical destinations we operate to, and we'll always put safety before schedule."
Choice head of media, Tom Godfrey, said Jetstar "needs to clean up its act".
"It's not surprising Jetstar rated so poorly given its track record of delays and cancellations and its policy of landing its customers with sneaky pre-ticked extras."
Jetstar has previously announced pre-selection on its website will be removed from July 1.
Qantas was the highest ranking Australian carrier, which came in 36th in the world, while Virgin Australia ranked 51st of 73 airlines.
The global survey found Emirates was the best airline in the world.
Emirates had a satisfaction rating of 8.29 out of 10. For Qantas that was 7.24, followed by 7.05 for Virgin Australia. Jetstar's satisfaction rating was 6.01.
Air New Zealand ranked 26 with a satisfaction rating of 7.63.
Criteria included punctuality, checking in, boarding, treatment by staff, comfort, meals, safety and value for money.
You can make a complaint about a delayed or cancelled flight at Choice.
Satisfaction score out of 10:
1. Emirates 8.29
2. Avianca 8.17
3. Qatar Airways 8.15
4. Luxair 8.1
5. Singapore Airlines 8.1
6. Azul Brazilian 8.08
7. Thai Airways International 8.02
8. Cathay Pacific 7.94
9. TAROM 7.79
10. Vietnam Airlines 7.79
26. Air New Zealand 7.63
36. Qantas 7.24
51. Virgin Australia 7.05
73. Jetstar 6.01
Source: Choice Australia