At 11 out of the 15 airports where NATS operates air traffic services there was a rise in scheduled air traffic. Stansted led this increase with a rise of 9.8%, Glasgow saw a rise of 9.2% and Cardiff a rise of 7.9%.
NATS-attributable delays totalled 12,487 minutes last month, making it the fourth lowest September total since records began in 1996.
The UK market grew by 2.3% last month, with the Non-transatlantic Overflights sector leading the way again with a 4.9% rise and Transatlantic Arrivals/Departures also growing by 4.3%.
Martin Rolfe, Managing Director Operations, NATS, said: “I am pleased to report that NATS has handled further traffic growth alongside low levels of delay. This is good for the economy, travelling public and for our airline and airport customers.”