Strike-hit British Airways (BA) has published its contingency plans for the strike by cabin crew members of union Unite, which started today.
The airline said it expects to fly more than 70% of customers who hold a booking between May 24 and May 28.
BA has secured seats with 30 other airlines, and leased eight aircraft complete with cabin crew.
All flights to Gatwick and London City will operate as normal.
At Heathrow, BA intends to operate around 60% of long haul flights and 50% of short haul flights.
To underline the message that BA will continue to fly despite the walkouts, some of its aircraft will have "Keep the flag flying" painted on their fuselages.
The message will be emblazoned on ten Boeing 777s at Heathrow and two Boeing 777s at Gatwick.