How do I upgrade from economy to Business Class on Hawaiian Airlines?

To upgrade from Economy to Business Class on a Hawaiian Airlines flight, you can check for upgrade options during booking or manage your booking online. Look for email offers to bid or pay for an upgrade. 

Steps to upgrade a Hawaiian Airlines seat to Business Class:

1. Visit the official Hawaiian Airlines website and log in to your account or proceed as a guest.
2. Manage Your Booking: Go to "Manage Flights" or "My Trips."
3. Find and Select Upgrade: Look for an option to upgrade your flight to Business Class.
4. Confirm and Pay: Follow the prompts to complete your upgrade and payment if required.
5. Receive Confirmation: Check your email or notification for the updated booking.
6. Check-In: Ensure your boarding pass reflects your upgrade.

You can also ask about upgrades at the airport check-in counter or gate. For more information about Hawaiian Airlines Business Class, you can read the blog by Airlines Group Travel at the given link.