IndiGo starting July 2019 is adjusting service to Singapore, reflected in schedule listing as well as the airline’s website. Planned changes as follow.
Tiruchirapally – Singapore eff 01JUL19 Increase from 5 to 7 weekly
6E037 TRZ1840 – 0145+1SIN 320 D
6E035 SIN1400 – 1555TRZ 320 D
Vijayawada – Singapore Last flight scheduled on 27JUN19, currently served twice weekly