People travelling from Gatwick and Luton airport face disruption today as French transport workers go on strike.
Easyjet has cancelled 118 flights, with Ryanair, British Airways and Flybe also affected.
Passengers are being advised to check with their airline.
A woman has been arrested at Luton airport on suspicion of Syria-related terror offences.
The 25 year old woman from Haringey was arrested at around 11.30am as she left a flight that had returned to the UK from Istanbul.
She was arrested by detectives from the West Midlands counter-terrorism unit and is currently being held at a police station in the West Midlands on suspicion of preparing for acts of terrorism.
All flights in and out of Luton Airport have been cancelled this evening after a security alert. A spokesman for easyjet said:
Bomb disposal squad officers have carried out a controlled explosion at Luton airport.
Bedfordshire police have confirmed that the package was "not a home-made bomb."