I couldn't pay on IndiGo website with USA based CC either. It was something about the country selection toggle being broken on the web site. Managed to book and pay via the App (Android version). It was really painful process and kinda shocked how one of the biggest Indian airlines that is expanding internationally has this issue for years and doesn't fix its software.


Sat in row 3 and leg room felt cramped like in the back on WN / Southwest new less leg room in the back configuration. Next flight paid extra for row 1 bulk head.