You have the possibility at any time to modify your flight proposals: photos, aircraft, additional costs, duration, itinerary, etc. However, the changes do not apply to flights already booked by passengers. Indeed, the modifications will be taken into account for future reservations.
Here is the procedure for modifying a flight proposal:
Step 1 - Once connected to your pilot account, access the "Flights" area from the "Cockpit" tab:
Step 2 - Go to Quick Actions and click "Edit". Navigate between the tabs using the breadcrumbs and make the various changes you want before saving them: