United Airlines has lowered the cost of roundtrip flights to Hawaii, according to rates available on Travelzoo.

Customers can now purchase roundtrip flights to Hawaii through United Airlines leaving from select U.S. cities for as low as $489.  In order to obtain the special rate customers must purchase the roundtrip ticket and not a one-way fare.

Flights under this special are valid on certain days from now until June 9, 2011 and then again from August 15 through December 14, 2011. Customers may be required to purchase their tickets in advance. There may also be specific travel requirements depending on which route is selected by the customer.

The cost of the flight does not cover the additional taxes and fees that accompany flights.