Upgrade XiamenAir flight ticket to business class #cheapflights #cheapflightbooking #airlines #airlineservice #flightattendantchallenge #flightbooking The traveller will be given the option to upgrade to business class if available. The passenger can request an upgrade, however, there will be some fees involved. The traveller must take the actions listed in this blog, which will immediately and clearly inform him of the business class upgrade. Also, you can call XiamenAir customer service at +1 560 498 9674 or +1 801 630 8358 at any time. Resource URL - https://budgetflightsfare.com/blog/upgrade-xiamenair-flight-ticket-to-business-class/