Via Singapore

Fully advisory-clean DEL–NRT routing via Singapore. The DEL–SIN leg routes south over the Indian subcontinent, entirely avoiding Central Asian FIRs. The SIN–NRT leg tracks northeast through Southeast Asian FIRs and the South China Sea — also fully clean. Singapore Airlines operates both legs. Longest routing at ~10.2h total; preferred when both Central Asian advisories and northern South China Sea routing are elevated.

Limited alternative paths if the main corridor is disrupted

DEL–SIN–NRT is fully advisory-clean. Adds approximately 3 hours versus Central Asia direct. Singapore Airlines frequency on both legs is high; connection times at SIN are generally comfortable.