Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Halifax to Lihue as you normally would.
Within the past month, 20 users have taken a look at flights from Halifax Intl to Lihue.
This is defined as Halifax Intl Airport (YHZ) and Lihue Airport (LIH). Codes like Lihue Airport are often used to just call airports uniquely.