Does Google Flights have an API?
Google Flights had an API, but it is was deprecated on April 10th, 2018.
How do you get access to the Google Flights API?
Unfortunately, it's been discontinued. But there is a great alternative called the Skyscanner Flight Search API.
What data is available with the Skyscanner flight search API?
The main function of the Sky Scanner API is searching for flights. This can be done in two ways: cached search and live search.
Will Hipmunk be releasing an API for your flight search?
The Hipmunk API is available to consume on RapidAPI.