We looked through thousands of Travel 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 

Amadeus APIs allow you to test, explore, build and deliver apps to the market quickly.

Self-Service APIs

**Test, explore, build and deliver apps to the market quickly**

- Varied catalog of REST/JSON APIs
- Instant access to test environment
- Quick access to production
- Self-service documentation
- Pay for what you use
- Supported by Amadeus for Developers experts and the community

Amadeus 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

The Content API provide dynamic access to Tripadvisor content.

The Partner API provides provide dynamic access to Tripadvisor content. Partners can integrate the content into their websites and applications by calling the API, parsing the response, and displaying the data from the response on their site or in their app.

Approved users of the Tripadvisor Content API can access the following business details for accommodations, restaurants, and attractions:

- Location ID, name, address, latitude & longitude
- Read reviews link, write-a-review link
- Overall rating, ranking, subratings, awards, the number of reviews the rating is based on, rating bubbles image
- Price level symbol, accommodation category/subcategory, attraction type, restaurant cuisine(s)
 

Tripadvisor Content API 

BlaBlaCar search API allows to search for carpool trips, just as the BlaBlaCar’s website does. 

### Easily search for trips!
The BlaBlaCar API provides functions for searching and retrieving carpool data. With the API, developers can implement a trip search that displays trips, distance, duration, recommended price, savings, and links. BlaBlaCar API returns JSON data and accepts Key as the authentication method. 

#### Get an API key
In order to access to BlaBlaCar's search API, you first need to ask for an API key [here](https://support.blablacar.com/hc/en-gb/requests/new?ticket_form_id=360000312100).

#### Keep posted
From time to time, we will send planned maintenances, status and important evolutions on this [awesome mailing list](http://eepurl.com/cHubeL). Feel free to register if you want to stay informed.

#### How NOT to use the API?
- As a realtime platform, seats availability may change very often and there might be new trips offered anytime. For this reason, you shouldn't cache the results you retrieve from the API, or for a very small time (10 min max). Also, caching may bypass the "locale" parameter which would result into not the best relevant experience for the user.
- Every query should be triggered by a real user input.
- There is no bulk query so you need to make 1 query for each user's request.

BlaBlaCar API

Design innovative solutions thanks to Navitia.io, a robust, easy-to-integrate RESTful API based on the largest open database.

#### Overview
Navitia (pronounce [navi-sia]) is the open API for building cool stuff with mobility data. Navitia.io is an open-source, open-service API suite based on open data, offering advanced features dedicated to mobility such as multimodal and intermodal route searches, traffic information, timetable display, powerful autocompletion and the isochrone feature.

It provides the following services:

- multi-modal journeys computation.
- line schedules.
- next departures.
- exploration of public transport data.
- search & autocomplete on places.
- and sexy things such as isochrones.

Have a look at these [examples](https://doc.navitia.io/#some-examples) to learn what services we provide and how to use them.

#### Approach
Navitia is an open-source web API, initially built to provide traveler information on urban transportation networks.
Its main purpose is to provide day-to-day informations to travelers.
Over time, Navitia has been able to do way more, sometimes for technical and debuging purpose or because other functional needs fit quite well in what Navitia can do or just because it was quite easy and super cool.

Technically, Navitia is a HATEOAS API that returns JSON formated results.

Nativia API

The GraphHopper Directions API Route Planning For Your Application.

Add routing to your software and focus on your business. Access the GraphHopper Directions API with a plan that suits you. Whether it’s a Basic package, a custom-tailored enterprise solution or a high volume requirement, each option includes credits you can spend for our services.

#### GraphHopper Directions API

With the GraphHopper Directions API you can integrate A-to-B route planning, turn-by-turn navigation, route optimization, isochrone calculations and other tools in your application.

The GraphHopper Directions API consists of the following RESTful web services:

- Routing API.
- Route Optimization API.
- Isochrone API.
- Map Matching API.
- Matrix API.
- Geocoding API.
- Cluster API.

GraphHopper API

### RoadGoat Cities API
Welcome to the RoadGoat Cities API, featuring the world's most comprehensive database about travel destinations - towns, cities, regions, states, countries, and continents.

#### Destinations
The Cities API provides clean, hierarchical context about destinations all over the world.

#### What's In A Destination?
A place is so much more than a name. RoadGoat brings a place to life by painting an informed, robust, and meaningful understanding of what a place is all about.

#### State-of-the-art Technologies
RoadGoat uses advanced machine learning algorithms and synthesizes all the available information to provide the richest and most accurate context about over 4.3+ million destinations - from Indonesian megacities to remote English villages.

The RoadGoat Cities API gives access to the same great content that powers RoadGoat, one of the most dynamic travel sites on the web.

#### From Developers to Developers
From providing basic needs such as a location's photos and coordinates to more abstract context such as "known for" tags, budget ratings, and safety ratings, the RoadGoat API has you covered.


The Top 15 Travel Apis for Developers