Which flight search engine is best?

This is very subjective by each user, but Skyscanner seems to be the preferred flight search API by RapidAPI users (versus Hipmunk).

Is it safe to book through Skyscanner?

Yes, Skyscanner is a trusted travel website and metasearch engine that launched in 2002.

How do you find the cheapest flights on Google Flights?

Google Flights API (QPX Express) is no longer available . You can search for the cheapest flights on APIs such as Skyscanner, Hipmunk, and other flight search APIs .

Kayak Expedia Booking.com Momondo

Skyscanner vs Hipmunk: API Comparison (2019)

A side-by-side comparison of Skyscanner and Hipmunk API on RapidAPI.

Learn which travel API is best for you to enrich your website, software, or mobile application with flight, hotel, and car rental data to help find your users find the best possible deal.

Feature	Skyscanner	Hipmunk	Comments
Official API?	Yes	No	The Skyscanner API is officially listed by Skyscanner, while the Hipmunk API on RapidAPI is an unofficial API.
API Name	Skyscanner Flight Search	Hipmunk
Search Flights	Yes	Yes	Both Skyscanner and Hipmunk API can poll sessions and search flights.
Cars	Yes (Separate API: Skyscanner Car Hire Live Prices)	Yes	Skyscanner has a Car Search API functionality, but Hipmunk does not.
Location Search	Yes	Yes	Both Skyscanner and Hipmunk can perform a location search.
Popularity Score	9.9/10	8.7/10	Skyscanner is a more popular API than Hipmunk on the RapidAPI platform.
Latency	270ms	3421ms	Skyscanner has a shorter latency versus Hipmunk
Success Rate	38%	97%	Hipmunk has a higher API success rate than Skyscanner.
Created by	Skyscanner	API Dojo	Browse other APIs built by Skyscanner and API Dojo.
Free	Yes	No, but freemium plan available	Only Skyscanner is completely free to use, while Hipmunk charges for high usage.
Pricing Type	Free	Freemium	Skyscanner offers a free API plan, while Hipmunk offers a freemium limited plan on RapidAPI.
Languages Available	Node.js, PHP, Python, Ruby, Objective-C, Java (Android), C# (.NET), cURL, RapidQL	Node.js, PHP, Python, Ruby, Objective-C, Java (Android), C# (.NET), cURL, RapidQL	Both Skyscanner and Hipmunk APIs are available in your favorite programming language.
Get Free API Key	Skyscanner Flight Search	Hipmunk	Get a free API key for either API on RapidAPI now!

Verdict

Both Skyscanner and Hipmunk are excellent travel and booking APIs to help search the cheapest flights and travel fares from ticketing agencies/travel agents, but one may be better than the other. While both APIs offer similar flight searching functionalities, developers tend to prefer Skyscanner over Hipmunk due to its latency and free plans (see popularity, latency scores above).