While there are more than just a few landmarks in Singapore, most momondo users find Sentosa Island, Chinatown, Universal Studios Singapore, and Marina Bay Sands to be the most interesting places to see in the country.
Flying into Singapore Airport is typically the best way to visit Sentosa Island, since it is the closest airport to the area.
The best prices found on momondo for flights to Singapore are:
$107 per person with Scoot
$111 per person with Malindo Air
$124 per person with Jetstar Asia