Gatwick Airport has been ranked second in the worst 10 airports in the world, according to the AirHelp index.
Stansted, Manchester and Edinburgh also made the bottom 10.
The ranking looks at punctuality, quality and service at 76 airports worldwide.
Meanwhile, Heathrow Airport was the top ranked UK airport at number 20, between San Francisco and Vancouver.
The rankings also looked at airlines, with British Airways ranking seventh worldwide out of 87, followed by Virgin Atlantic.
Flybe, with its second biggest base in Southampton, came in 22nd.
Ryanair and Monarch featured in the bottom five.
The airlines are measured by their on-time performance, quality of service and how well they process compensation claims.
The top 10 airports in the world and their score in the AirHelp index:
- Singapore Changi - 9.07
- Munich, Germany - 8.66
- Hong Kong - 8.42
- Copenhagen Kastrup, Denmark - 8.04
- Helsinki-Vantaa, Finland - 8.03
- Cincinnati-Northern Kentucky, USA - 7.94
- Barcelona El Prat, Spain - 7.90
- Madrid Adolfo Suarez-Barajas, Spain - 7.81
- Auckland, New Zealand - 7.80
- Frankfurt, Germany - 7.76
The worst 10 airports in the world and their score in the AirHelp index:
- Kuwait - 5.02
- London Gatwick - 5.38
- Manchester - 5.43
- Newark Liberty, New Jersey, USA - 5.92
- Stansted - 6.07
- Edinburgh - 6.10
- Mumbai, India - 6.21
- Dubai, UAE - 6.24
- Bangkok Suvarnabhumi, Thailand - 6.30
- Delhi, India - 6.31