Whether Delta Comfort Plus is worth it for a flight to Hawaii depends largely on your height and how much you value early boarding. Comfort Plus offers 3 to 4 inches of extra legroom and dedicated overhead bin space, which can be a lifesaver on 5-to-11-hour flights from the U.S. mainland. You also receive "premium" snacks and complimentary alcoholic beverages, which are otherwise paid in the Main Cabin on domestic routes (though some long-haul Hawaii flights from the East Coast might include them anyway). However, the seat width is identical to standard economy, and the recline is only slightly improved. If the upgrade cost is under $100–$150, many travelers find the reduced "knee-crush" and earlier exit from the plane worth the price. If the price gap is several hundred dollars, you might be better off paying for a "Preferred" exit row seat in the Main Cabin or saving the money for a nicer meal in Hawaii, as Comfort Plus is still fundamentally an economy experience and not a true "Premium Economy" or First Class product.