While a truly "free" upgrade is rare, the most reliable way to get an "unpaid" bump on Hawaiian Airlines is through Pualani Elite Status. Platinum and Gold members are eligible for complimentary upgrades to Extra Comfort or First Class on a space-available basis within certain windows (e.g., 72 hours for Platinum). Another strategy is the "Bid Up" program, where you can name your own price for an upgrade; while not free, a low-ball bid can sometimes be accepted on underbooked flights. If you are a United MileagePlus member in 2026, you may also have increased opportunities for upgrades on codeshare flights using miles or "PlusPoints." Lastly, it never hurts to check in as early as possible or politely inquire at the gate if there are operational needs (like an oversold economy cabin) that might necessitate moving a frequent flyer to the front of the plane.