Google Flights Search API

Flight options from Google Flights for a route and date, as a signed-out visitor sees them. Search by airport codes (several per side allowed), with a return date for round trips, adults and children, cabin class (economy, premium economy, business, first), a stop limit and currency. Results come in Google's two groups, best flights and other flights. Each itinerary has its price, airlines, departure and arrival airports and times, total duration, number of stops, layovers (with length and airport changes), and carbon emissions against the typical amount for the route. Each segment has its flight number, codeshare numbers, aircraft, legroom and duration. The response also includes Google's price insights (lowest price, whether prices are low, typical or high, the typical price range and about 60 days of price history), the overall price range, and the airports searched. Prices are totals for all passengers. For round trips you get the outbound options with their round-trip prices; return flights, booking options and fare details (bags, fare class) are not included. Blocked or failed requests and searches Google rejects are free.