When is “off-season”? In general, Hawaii's off-season is in late winter (January to early March), late spring (late April to early June), and fall (September to mid-December).
How far in advance should I book a flight to Hawaii?
between 21 and 121 daysOn average, the best time to buy your ticket to Hawaii is between 21 and 121 days before departure, with the period between 40 and 50 days often mentioned as a golden rule. The figures mentioned above are valid for domestic flights within the USA.