Not to fly with any Indian airline…
Just never fly with any Indian airline and especially with Indigo. And never make a connection in India. They for sure will find a way how to screw up your flight - like it happened to me. They didn't update me that PCR test is required for flights to India. And once I received my test result (and it's not trivial in Bangkok airport) their plane left without me. They suggested to buy a new ticket with discount - 200 usd instead of 300 usd. And a fast PCR test costed me 100 usd. Also I had an unforgottable experince of the connection in Mumbai - it just was a circus show. And the final thing which drives me crazy - on arrival in Mumbai nobody asked to see the test result. Nobody in India really cares that you made PCR test.