Park or Ride is a free online trip calculator that helps travelers compare the estimated cost of driving and parking at an airport versus taking a rideshare service such as Uber or Lyft. The tool covers over 1,500 airports across North America, Europe, Japan, Australia, and other regions. Its primary function is to provide a side by side cost comparison for a specific trip, allowing users to see the estimated expenses for each transportation option in seconds. The tool calculates estimates based on publicly posted airport parking rates and typical rideshare pricing. Users input their trip details, including the airport, travel dates, and parking duration, to generate a comparison. The results display the estimated cost of driving and parking alongside the estimated cost of using a rideshare service. The website also includes information on other ways to reach the airport, though the core feature remains the cost comparison between driving and ridesharing. Typical use cases include planning for business trips, vacations, or any travel where a user is deciding between self parking and using a ride hailing service. The workflow involves visiting the website, entering the relevant trip information, and reviewing the generated estimates. The tool is designed to be used before booking travel to inform the decision making process. All figures provided by Park or Ride are approximations and are not guaranteed pricing. Actual costs can vary due to traffic, surge pricing, peak travel periods, promotions, taxes, fees, lot availability, and rate changes. The website advises users to confirm prices directly with the airport, parking operator, or rideshare app before traveling. Park or Ride is not affiliated with any airport, parking operator, Uber, or Lyft. The tool is accessible via a web browser and requires no download or account creation.