Etretat Cliffs are part of the beautiful Alabaster White Chalk Mountain Coast, known for their three natural arches towering over the Atlantic Ocean. Saint-Gatien Airport in Deauville (DOL) is the nearest airport with nonstop flights from a few European cities (Heraklion, Palma, Palermo and Olbia) and Paris (CDG) is the closest nonstop international airport for visitors from the US. Since the place is packed with tourists, I recommend avoiding the summer time, weekends and holidays.
Award Booking Flights to Paris
The Flying Blue Program (Air France & KLM) is one of the easiest to book nonstop flights from several US cities to CDG airport in Paris (look to pay no more than 55K miles for one-way business class).
Paris Airport to Etretat Cliffs
I highly recommend renting a car and driving 2-3 hours from CDG airport to Etretat cliffs. One can break the journey to explore the architecture of Rouen city along the way to the cliffs. I recommend staying at least 2 nights in Etretat and hope to find a clear sunny day to enjoy the beauty of the cliffs.
Etretat Accommodations
There are several reasonably priced accommodations close to Etretat Cliffs and you should look for free parking when choosing a place (see image below from Booking.com).
Etretat Hikes
There are a few easy-to-moderate hikes (https://www.alltrails.com/france/seine-maritime–2/etretat) when visiting the Etretat Cliffs.
Etretat Scenery
Conclusion
Etretat Cliffs is a natural wonder in France that must be visited by all the travelers in this region. I recommend staying at least 1-2 nights in the area to enjoy the cliff hikes and avoiding a day trip from Paris.