Originally Posted by
zig666
So I ran into an issue with Air Vista. Purchasing the original ticket with a US Amex was no issue whatsoever. I'm now trying to pay for a instant business class upgrade but there Amex is not an available payment option and neither US nor EU credit cards are processed successfully.
Any suggestions?
The upgrades are run by plusgrade.com & not directly by Vistara, maybe if you try calling Vistara they can upgrade you directly using the original card.
FWIW I'm surprised the original purchase worked with a US issued amex, that's never worked for me purchasing directly on the vistara website.