We looked through thousands of Transportation APIs and put together a list of the most popular & cheapest ones available.

A subset of the capabilities of the Uber app are available through the Riders API.

The core capabilities of the Uber app are available through the API:

- Selecting a service (e.g., uberX, UberBlack, etc.)
- Specifying pickup and dropoff locations
- Viewing time and price estimates
- Requesting a ride

Uber Riders REST API 

Skyscanner Travel APIs connect you to all the data you need to build an innovative website or app.

 Flights API advantages

- Mobile first solutions to enable you to take advantage of the latest trends as they happen

- Support Network - Dedicated Account Manager, Engineering support team and a developer hub with all the resources needed to integrate

- Easy set up and flexible integration of travel search

- Inspirational search features - combine our Travel APIs with your existing travel offering to complement your product range

- Dedicated online portal to manage your revenue and commissions

- Global content and coverage supporting your expansion to over 30 markets and languages and over 1,000 travel partners

- Complete solution with data, content and legal requirements all taken care of so you can focus on growing your business

Skyscanner Travel API

Flight tracker & airport timetable data web service trusted by 5.000+ of the smartest companies

**Free, Real-time Flight Status & Global Aviation Data API**
_Flight tracker & airport timetable data web service trusted by 5.000+ of the smartest companies_


- **Extensive Flight Data**
Tap into an extensive set of aviation data, including real-time flight status, historical flights, schedules, airline routes, airports, aircrafts, and more.
- **Worldwide Coverage**
Powered by a strong backbone of aviation data sources, our API delivers accurate details about any global flight at any stage, even down to the minute.
- **Powerful Infrastructure**
Our API is built on top of scalable cloud infrastructure, capable of handling any volume — from thousands of requests per month to millions per minute.
- **Easy on Your Budget**
Sign up for the Free Plan to get 500 free API requests per month, or choose a premium data subscription starting at just $49.99 monthly, cancel anytime.4

**Features at a glance**
_Whether it's building booking platforms, visualizing and monitoring global flights or creating popular flight tracking applications — our flight data API is used by thousands every day._

- Live Flight Tracking
- Historical Flight Data
- Airline Routes Lookup
- Airport Lookup
- Airline Lookup
- Airplane Lookup
- City Lookup
- Country Lookup
- Aviation Tax Lookup

 aviationstack API

Smartcar is the only car API built for developers, by developers.

Smartcar is the car API for mobility applications. We allow car sharing, auto insurance, fleet management, and EV charging applications to retrieve the location, odometer reading, EV battery level, and other information from vehicles across brands in a single integration.

Smartcar makes it easy to read vehicle data and send commands to vehicles of any brand using HTTP requests. The Smartcar API is organized around REST. We use built-in HTTP features like HTTP verbs and HTTP authentication so you can use any HTTP client. All responses are returned in standard JSON and are documented in our API reference.

All requests made to our API require an access token. Our API uses the OAuth2 authorization framework and provides a granular permissioning system that authorizes API endpoints based on user preferences. This allows applications to easily authorize and interact with vehicles through the Smartcar API.

The Top 20 Transportation Apis for Developers