Per Wikipedia at http://en.wikipedia.org/wiki/US_Airways_fleet, there are 104 A321s in the US fleet and 6 A321s remaining on order. However, per the orders and deliveries spreadsheet at http://www.airbus.com/company/market/orders-deliveries, US ordered 121 A321s, of which 100 have been delivered and operating and 21 remain on order (as of 7/31/2014). I tend to think airbus.com is accurate, yet I imagine the folks who update the Wikipedia page got their data from somewhere. Anyone know which is correct (or are both wrong)?