Introduction - If you have any usage issues, please Google them yourself
Find the shortest flight time between any two airports.
Only direct flights or one transit are allowed, and the routes of any two airports (flight ID sequence table) are obtained.
Given the take-off time or landing time or aircraft type requirements, find multiple alternative routes (flight ID sequence table) for any two airports.
Given the take-off time or landing time or aircraft type requirements, find the lowest route between any two airports (ticket price).