Heathrow has updated its rankings of the noisiest and quietest airlines using the airport, with Scandinavian Airlines System and Lot Polish Airlines flying to to the top spots.
At the other end of the scale, Egyptair came bottom of the rankings, followed by Kuwait Airways and Turkish Airlines short-haul.
Heathrow said Lot Polish Airlines had turned out as one of the success stories at the airport, having overhauled its noise and emissions performance from lingering at the bottom of the rankings to coming up first.
The carrier now uses new Boeing 737 Max aircraft for its Heathrow services, with the engines quieter and more efficient than those it had been using previously.
The latest table ranks the performance of the 50 busiest airlines at Heathrow from January to March 2018 on seven noise and emission metrics.
The London airport announced last year that it would continue to publish an updated league table every quarter to assess the carriers on their performance and see which areas in particular needed improvement.
|Cleanest and quietest||Noisiest and dirtiest|
|1. Scandinavian Airlines System||1. Egyptair|
|2. Lot||2. Kuwait Airways|
|3. Aer Lingus||3. Turkish Airlines - short-haul|
|4. Etihad Airways||4. El Al|
|5. Flybe||5. Pakistan International Airlines|
|6. British Airways - short-haul||6. Turkish Airlines - long-haul|
|7. Finnair||7. Korean Air|
|8. Delta Air Lines||8. European Air Transport|
|9. United Airlines||9. China Southern Airlines|
|10. Iberia||10. Air China|
Matt Gorman, Heathrow’s director of sustainability said Lot Polish Airlines' progress reflected the results that can be achieved "by working productively with our airline partners to encourage them to use quieter technology and operating procedures for the benefit of our local neighbours".
We know there is always more we can do to reduce our noise impacts, and we have set some ambitious targets in our new noise action plan.
We encourage all of our local neighbours to give us their feedback on this plan, and help us shape the way we manage noise in the future.