Where can I get information about the cost of air tickets?

Question

API

Interested in the API for automatic requests.
Only the cost is enough, the possibility of buying is optional. Air tickets - across Russia.
Can this information be obtained somewhere free of charge and without concluding contracts?

Answer 1

Offers from airlines are aggregated by special GDS organizations that sell access to them to agencies. Agencies, in turn, can sell access to sub-agents. Etc. In addition, some agencies enter into contracts directly with airlines.
In general, the price search operation is not free in most cases, and it is unlikely that you will get access to this data legally and free of charge.