Paris Charles de Gaulle (CDG). After that you will need to either take the bullet train via SNCF TGV from the airport at the CDG train terminal to Aix en Provence TGV station (approximately 3hrs) or take a second flight into Marseille Provence Airport (approximately 1hr). Website to book train- https://www.sncf-connect.com
I highly suggest renting a car to be able to get around seamlessly and site see. There are several car rental companies available at the airport such as National, Avis, hertz, etc.
Under travel you will find three recommended hotels and airbnb recommended locations. Additionally, you will find an extensive list of hotels in the area that have been discounted for the wedding.
ETIAS for American Citizens Starting in "the first half of 2025," Americans will need one additional approval to enter countries in the European Union. To visit, you'll have to apply for approval under the European Travel Information and Authorization System (ETIAS). You will apply online, and the authorization, which will be linked to your passport, will account for short-term stays, including up to 90 days in a 180-day period. This had been planned to be in effect in 2024, but in 2023, the European Union indicated it won't happen till 2025. ETIAS is expected to be operational in spring 2025.
Passports are required to enter Europe. The expiration date of your passport MUST be more than 6 months away from the wedding date - August 16, 2025. For example, if your passport expires between July and December 2024, you cannot fly. Passport renewal can take up to 9 months, so please plan accordingly! There are options for expedited passport renewals, but be advised you will have to pay more money.