Easyjet offer flights from Gatwick to Bordeaux regularly in the summer months. These are usually released in the September of the previous year (2025). The drive from Bordeaux to Monflanquin is about 1h45min.
Flying into Bergerac Airport is another option, as Bergerac is slightly closer (40min drive to Monflanquin). Flights operate from London Stansted airport. Check SkyScanner for more updates / flight schedules.
Driving from St Malo is what we will be doing, and can be made into an exciting road trip if you don't mind a longer drive (6h30m). DFDS sail from Jersey, with bookings likely opening in March 2026. However if you choose this option, don't wait this long to book your accommodation as places can get booked up quickly, especially in a small pretty town like Monflanquin!