Airline named first in the cleanest and quietest flying into LHR. MUSCAT, Oman, 2019-Mar-21 — /Travel PR News/ — Oman Air, the national airline of the Sultanate of Oman, has been recognised as the cleanest and quietest carrier in contributing to the reduction of the noise footprint at UK’s Heathrow Airport, as per the Fly… Read the full press release