Ngurah Rai Airport publishes parking charges by vehicle type:
Bikes
Motorcycle parking costs IDR 5,000 for the first 12 hours, then IDR 3,000 for each additional hour. The lost-ticket fee is IDR 50,000. Keep in mind that in this case, you will likely need the original STNK from the bike. This is the long and narrow document containing the bike's key parameters and serial numbers. It's also advisable not to leave a good helmet in the parking lot.
For covered two-story bike parking locations on Google Maps: one, two, three, four. They are located close to each other.

There is also an open-air parking lot that you can use conveniently if you are arriving at the airport for a short period.

After parking your bike, you will need to walk to the interior terminal building at the airport following this route:

There are several open areas exposed to the elements, so if it's raining, keep that in mind.
You'll need an umbrella or raincoat. Bikes can be left in the parking lot for an extended period, but not longer than two weeks. After two weeks, they are taken to storage. There's nothing to worry about; upon arrival, you'll need to find the responsible person and retrieve the bike from storage, which may take more time depending on the circumstances. The storage is located on the airport premises.
Cars
For four-wheeled vehicles, the first hour costs IDR 12,000, and each additional hour costs IDR 6,000. The lost-ticket fee is IDR 100,000.

The route to it will be easily calculated. From the car park, you almost immediately find yourself under a covered walkway, so if it's not pouring rain, you can do without an umbrella; otherwise, you might get slightly wet.
Premium Parking for Cars is listed separately from standard parking. Check Ngurah Rai Airport’s current tariff page for its price and location.

Buses, trucks, and other vehicles with more than six wheels cost IDR 16,000 for the first hour, then IDR 6,000 for each additional hour. The lost-ticket fee is IDR 100,000.
ATTENTION!!!
Ask the driver for the parking ticket or receipt if an airport parking charge is added to your fare. Compare the amount with the airport’s posted tariffs. A lost-ticket penalty is separate from the normal parking charge.
This is written in detail in the topic about the Airport in Bali. Travellers also discuss how to book an airport transfer and what pickup time to set.
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