British Airways is offering flexible re-booking options ahead of Storm Dennis hitting the UK this weekend.
Strong winds are expected across London on Saturday, potentially affecting flights.
Hundreds of flights were cancelled by airlines last weekend as Storm Ciara struck the UK, as high winds and flooding affected ferry, road and rail services.
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BA acted as an amber warning of rain for much of England and Wales was issued by the Met Office for 24 hours from 3pm on Saturday due to the imminent arrival of Storm Dennis.
A similar warning of “very heavy rain” applies to London and the south-east for most of Sunday, bringing disruption to travel.
Lesser yellow warnings of strong winds are in place for much of the UK for the weekend.
BA said: “We recognise the uncertainty that the expected bad weather may be causing customers, and have therefore introduced flexible re-booking options for customers booked on short-haul flights in or out of Heathrow, Gatwick or London City airports on Saturday.
“Safety is at the heart of everything we do, and our highly trained team is carefully monitoring the weather this weekend.
“If you are booked on a short-haul flight to/from Heathrow, Gatwick or London City airports on Saturday 15 February, and wish to change your plans, you can rebook to bring your flight forward to Friday 14 February, or delay your travel to another flight between Sunday 16 February and Wednesday 19 February, inclusive.”