Fly from Mumbai to Kolkata with GoAir - Fares From Rs.3499
https://in.musafir.com/Airlines/goair/promotion.aspx

Terms

• *The offer is valid only on select GoAir domestic flights and is governed by the airline terms and conditions.
• Flights effective from July 28, 2017.
• Seats are subject to availability.
• Blackout dates applicable.
• Offer only valid for direct individual travel purchases of domestic flights for adults and children purchased online on in.musafir.com.
• Offer not valid for pre-packaged trips, trips booked by travel agents or in conjunction with any other offer.
• Musafir.com India Private Limited reserves the right to withdraw this offer at its discretion and without prior notice.