Top 20 Busiest Routes of IndiGo, No. 10 Will Surprise You! IndiGo Airlines' No. 1 busiest domestic route connects the financial capital, Mumbai (BOM), with the national capital, Delhi (DEL). 1. Mumbai (BOM) – Delhi (DEL) Passenger Volume: 5,904,651 Market Share: 43% IndiGo Passengers: 2,539,000 YoY Growth Rate: 2.3% 2. Bengaluru (BLR) – Delhi (DEL) Passenger Volume: 4,082,979 Market Share: 47% IndiGo Passengers: 1,919,000 YoY Growth Rate: 3.6% 3. Bengaluru (BLR) – Mumbai (BOM) Passenger Volume: 3,751,111 Market Share: 45% IndiGo Passengers: 1,688,000 YoY Growth Rate: 6.4% 4. Kolkata (CCU) – Delhi (DEL) Passenger Volume: 2,240,678 Market Share: 59% IndiGo Passengers: 1,322,000 YoY Growth Rate: 2.7% 5. Delhi (DEL) – Hyderabad (HYD) Passenger Volume: 2,564,000 Market Share: 50% IndiGo Passengers: 1,282,000 YoY Growth Rate: -3.7% 6. Mumbai (BOM) – Chennai (MAA) Passenger Volume: 1,992,063 Market Share: 63% IndiGo Passengers: 1,255,000 YoY Growth Rate: 14.7% 7. Mumbai (BOM) – Hyderabad (HYD) Passenger Volume: 2,083,051 Market Share: 59% IndiGo Passengers: 1,229,000 YoY Growth Rate: -1.5% 8. Delhi (DEL) – Chennai (MAA) Passenger Volume: 1,850,000 Market Share: 60% IndiGo Passengers: 1,110,000 YoY Growth Rate: 5.5% 9. Bengaluru (BLR) – Kolkata (CCU) Passenger Volume: 1,764,407 Market Share: 59% IndiGo Passengers: 1,041,000 YoY Growth Rate: -9.8% 10. Delhi (DEL) – Pune (PNQ) Passenger Volume: 2,416,667 Market Share: 42% IndiGo Passengers: 1,015,000 YoY Growth Rate: 4.3% 11. Hyderabad (HYD) – Chennai (MAA) Passenger Volume: 1,247,468 Market Share: 79% IndiGo Passengers: 986,000 YoY Growth Rate: -12.0% 12. Bengaluru (BLR) – Hyderabad (HYD) Passenger Volume: 1,696,429 Market Share: 56% IndiGo Passengers: 950,000 YoY Growth Rate: 1.7% 13. Mumbai (BOM) – Kolkata (CCU) Passenger Volume: 1,591,525 Market Share: 59% IndiGo Passengers: 939,000 YoY Growth Rate: 5.0% 14. Ahmedabad (AMD) – Mumbai (BOM) Passenger Volume: 1,701,887 Market Share: 53% IndiGo Passengers: 902,000 YoY Growth Rate: 6.8% 15. Bengaluru (BLR) – Pune (PNQ) Passenger Volume: 1,688,235 Market Share: 51% IndiGo Passengers: 861,000 YoY Growth Rate: 5.8% 16. Delhi (DEL) – Srinagar (SXR) Passenger Volume: 1,927,273 Market Share: 44% IndiGo Passengers: 848,000 YoY Growth Rate: 8.5% 17. Ahmedabad (AMD) – Delhi (DEL) Passenger Volume: 1,712,500 Market Share: 48% IndiGo Passengers: 822,000 YoY Growth Rate: -1.8% 18. Delhi (DEL) – Goa (GOI) Passenger Volume: 1,522,449 Market Share: 49% IndiGo Passengers: 746,000 YoY Growth Rate: 7.6% 19. Kolkata (CCU) – Hyderabad (HYD) Passenger Volume: 953,947 Market Share: 76% IndiGo Passengers: 725,000 YoY Growth Rate: -6.9% 20. Delhi (DEL) – Patna (PAT) Passenger Volume: 1,111,667 Market Share: 60% IndiGo Passengers: 667,000 YoY Growth Rate: 2.6%