From last one year I am in Singapore and frequently I travel to Hyderbad.
Only airlines which comes to my mind is Tiger.
It provides best economical rates compared to all others.
Best part is non stop and 4.5 hours like Singapore or Silkair.
Every Thursday Tiger comes up with some offers which we can subscripe for alerts and get the best deals.
On 23 Sep it is celebrating 12 years and offering 12 cents price for so many destinations.
Do watch that space.
Overall it’s most affordable airlines.??????