Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chennai to Spokane as you normally would.
Related info for your journey
Useful info, stats and facts about Chennai to Spokane flights.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Chennai Airport to Spokane Airport flight would often be abbreviated as a MAA to GEG flight.