The SIXT share Airport Guarantee holds a vehicle for you at the airport for up to 14 hours — even if you land late or demand has been high all day. You only pay if you actually start a trip.
How to book the Airport Guarantee
- Open the SIXT share section in the SIXT App.
- Select the airport location where you want to pick up your car.
- Tap "Book guarantee" — the price is shown before you confirm.
- Optionally choose your preferred transmission type (automatic or any).
- Confirm your booking. No pickup time needed — the guarantee is valid for 14 hours from the moment you book.
What happens after you book
We monitor vehicle availability at your airport continuously. If enough vehicles are on site when you arrive, you simply reserve a car of your choice and drive off. If availability drops below a set threshold, we automatically reserve a vehicle for you and send you a push notification — that car is then held for you until you arrive.
Choosing your vehicle
If no vehicle has been automatically reserved yet, you can select one at the airport location yourself at any time — your guarantee transfers to that reservation. Keep in mind: the usual conditions apply to a reservation you make yourself. The first 15 minutes are free; after that, regular reservation minutes are charged until you unlock the car. We recommend reserving only once you're at the location.
If a vehicle has already been automatically held for you, you'll see it in the SIXT App and can unlock it directly. Switching to a different vehicle is not possible at that point. Your selected transmission preference is taken into account when we choose the car.
Using another SIXT share vehicle while the guarantee is active
While your Airport Guarantee is active, you can't start another reservation — even at a different location. If you need a vehicle elsewhere in the meantime, end the guarantee in the SIXT App first, then rebook if enough vehicles are still available.
Cost
The guarantee fee is shown in the SIXT App before you confirm. It's only charged if you start a trip, and it's added to the cost of that trip. If you don't use a vehicle, you pay nothing. No additional reservation costs apply for the time a vehicle is automatically held for you, regardless of how long it takes you to arrive.
Canceling the guarantee
You can end the guarantee in the SIXT App at any time, free of charge. Please do so as soon as you know you no longer need the vehicle — this makes it available for other customers.
If the guarantee isn't available to you
The Airport Guarantee is only offered at selected airport locations and only when enough vehicles are currently on site. If availability is too low, the option won't appear.
If your reserved vehicle has a defect
End the reservation in the SIXT App and select another available vehicle. If you've been charged in error, contact our customer service team — we'll take care of the refund.
Adding extras
Before unlocking your car, you can customize your trip as usual and add protection packages or other options.
Still need help? Find our contact options below.