Yes, upgrading their economy class ticket to first class on Hawaiian Airlines is generally considered worth it for long-haul flights. especially those aircraft featuring lie-flat seats, which provide significant comfort for journeys of 6 hours or more. Travelers can upgrade their economy class ticket to Hawaiian Airlines First Class by using the online Instant Upgrade or Bid Upgrade program, redeeming points during booking or up to 4 hours before departure, or upgrading at the airport check-in counter last-minute for cash or miles. For further information, travelers can visit the official website and read the blog mentioned by Fares First Class.