The airline will start flying the Chittagong-Kolkata route from April 13, with the Chittagong-Dhaka-Bangkok route starting May 3.
The one-way fare for Chittagong-Kolkata is Tk6,399 and a return ticket will cost Tk12,199, according to a press release.
The Dhaka-Bangkok fare is Tk15,599 and a round trip will be charged Tk21,500. The Chittagong-Bangkok fare is Tk16,999 while a round-trip will cost Tk26,599.
All fares are inclusive of all taxes and surcharges.
US-Bangla Airlines will fly to Kolkata every Thursday and Sunday.
The Bangkok flights will operate on Mondays, Wednesdays, Fridays and Saturdays.