The Kotak IndiGo 6E Rewards Credit Card is a co-branded travel card built around India's largest domestic carrier. Its reward structure favors IndiGo flyers with 3% 6E Rewards on all bookings made through goindigo.in or the IndiGo app, while dining, entertainment, and grocery spend earns 2%. All other eligible purchases return 1%. The 6E Rewards you accumulate are valid for 24 months and can be redeemed directly for IndiGo flight base fares, keeping the redemption process simple and airline-focused.Welcome benefits deliver strong first-year value against the ₹700 joining fee. New cardholders receive a flight ticket voucher worth ₹1,500 and 6E Prime add-ons valued at ₹1,099, covering priority check-in, seat selection, and a complimentary meal on their next IndiGo flight. You can also earn a complimentary IndiGo air ticket by completing three transactions per month during the first three months after card issuance.Starting June 2025, several spending categories stopped earning rewards entirely. Utility bills, education payments, wallet loads, fuel, rent, government transactions, insurance premiums, and online gaming purchases no longer generate 6E Rewards. A 1% transaction fee also applies on rent and education payments, and on wallet and gaming spends above ₹10,000, utility bills above ₹50,000, and fuel above ₹35,000 per month. These restrictions narrow the card's effective earning potential considerably.Without airport lounge access and with no annual fee waiver at any spending level, this card works best for cardholders who book IndiGo flights at least a few times a year and can take full advantage of the welcome benefits. Casual spenders or those who fly other airlines will find better value elsewhere in the entry-level card segment.