Purchasing upgrade at the airport on ANA
Hello - I am currently flying on a codeshare ticket (UA) with the second leg of the flight on an ANA plane. To purchase this leg of travel as business class is $5K (just for this leg...). Does anyone know if ANA allows for purchase of business class upgrades the same day of the flight? They won't sell it to me now because I'm ticketed on a 'United' flight (plane is ANA). Thank you so much in advance for the assistance!