How about JetStar?

Fare including 20 kg baggage...$54USD all-in.


Booking Summary
DEPARTURE
01/08/2010 $54USDPer Passenger

SGN - 8:55 AM
SIN - 11:55 AM
Departure Total$54.00
Adult $40.00
Taxes and surcharges $14.00
Airfare per paying Adult $54.00
1 x Adult Subtotal $54.00
ADD-ONS Total$0.00
EXTRAS Total$0.00
Travel Insurance $0.00
Carbon Offset $0.00
Comfort Pack $0.00
Entertain Me $0.00
Excess Baggage $0.00
Feed Me $0.00
Parking $0.00
Gold Coast Lounge $0.00
Extra Leg Room $0.00
Extra Leg Room $0.00
Facilitation Fee $0.00
CS $0.00
BO $0.00
Total PriceUSD$54