Last-ditch efforts have been made to avert strike action on Tuesday (6 August) which would disrupt flights at London Heathrow.
Officials from Heathrow and the Unite union are holding talks after today's (Monday) strike at the UK's biggest airport was called off late on Sunday with airlines, such as British Airways, reinstating flights.
However, 16 flights were still cancelled today from select airlines - such as Lufthansa which grounded three services.
Heathrow had initially cancelled 177 flights when the two-day strike action was announced.
Some 2,500 workers had planned to strike on both days in a row over pay.
A Heathrow spokesman advised passengers to check with their airlines to see if there were any changes to cancelled fights.
He said: "We regret that passengers have been inconvenienced by this and urge them to contact their airline for up to date information on the status of their service."
In late July, British Airways (BA) lost its appeal to stop its pilots taking strike action after a High Court judge ruled that the ballot had been issued correctly and that the result could therefore stand.
British Airline Pilots’ Association (Balpa) revealed that 93% of its members coxed on 22 July to strike over pay.