I didn't realize you could do airfare + car ONLY. For all my previous "packages" I did airfare + hotel since I
did want to stay in the hotel in ZRH. I only go to LAS or ZRH, since ZRH has not yet (re)opened to US tourists, I'm doing LAS not as good as ZRH would be with an exception fare for earning MQDs--no matter what you do JFK to LAS will always be 2248 miles.
You have to look for Advanced Search Options. Link below takes you to the booking to the booking page and at the top there are 3 tabs. Default is flight and hotel, other two options are flight/car and hotel/car.
Looking to book Flights and Car? Traveling with children need more than one hotel room? Advanced Search Options