Of course! When configuring the trip in the "Customize" section, it is possible to modify or delete any flights included in the itinerary.
By clicking on "Manage" and "Change", next to each flight, you will be able to view the flights available for the selected date starting from the three best options: "best", "cheapest", "fastest". Use the filters to choose the solution that best suits your needs.
If you want to delete the flight connection, click on the "Manage","Remove" icon next to each flight.