Buy one, get one free: Biman

Biman Bangladesh offers two tickets for the price of one for roundtrips from Bangladesh to Kolkata, New Delhi, Bangkok, Hong Kong, Singapore or Kuala Lumpur, as part of a promotion scheme for the Eid-ul-Fitr.
Travellers must book their tickets before August 4, and travel between August 5 and August 30 to take advantage of the offer, the airline said in a statement yesterday.
The offer is applicable to two passengers flying together and will not apply to a group of three.
For a group of four, two tickets must be purchased in each booking.