It is Indigo’s 11th Birthday this year, so they are offering fares from INR 1111 onwards, with another 11% discount if you pay via Mobikwik, coming to a total of INR 990.

Here is the detail of the promotion, along with the T&C in detail. You need to book by August 6, 2017 (book at least 15 days ahead of travel date), and you can travel between August 15, 2017 through March 24, 2018. For instance, the Srinagar – Chandigarh flights come at INR 1111, and the Mumbai – Delhi flights are coming in at INR 2011.

• This offer is valid only on select non-stop flights from Agartala, Ahmedabad, Amritsar, Bagdogra, Bangkok, Bengaluru, Bhubaneswar, Chandigarh, Chennai, Coimbatore, Dehradun, Delhi, Dibrugarh, Dimapur, Doha, Dubai, Goa, Guwahati, Hyderabad, Imphal, Indore, Jaipur, Jammu, Kochi, Kolkata, Kozhikode, Lucknow, Madurai, Mangalore, Mumbai, Muscat, Nagpur, Patna, Port Blair, Pune, Raipur, Ranchi, Sharjah, Singapore, Srinagar, Thiruvananthapuram, Udaipur, Vadodara, Varanasi and Visakhapatnam.
• This offer is applicable on bookings made 15 days prior to travel.
• The offer is applicable on all our booking channels.

The promotional rates are across the board, so you can book with the airline directly, or use some of the other OTAs as well. For instance, Akbar Travels India and Yatra, MakeMyTrip, Expedia India & Cleartrip. On these portals you may also find good pricing on other airlines as well, such as GoAir and SpiceJet.