More than 800 Delta aircraft, including all Delta Connection two-class regional jets, are equipped with in-flight Wi-Fi service offering more than 400, 000 customers per day access to the internet above 10, 000 feet.
Delta Airlines recently announced it was partnering with Amazon to provide passengers with free access to shop the online retail giant's website onboard all of Delta and Delta Connection flights with in-flight Wi-Fi service.
It is getting harder to find good excuses for being offline: this week the European Union allowed airlines to offer in-flight mobile-phone service, and several carriers have Wi-Fi.
Aircell says it has hosted more than two million in-flight Wi-Fi sessions since turning on the service in 2008, but has never released revenue figures or revealed subscriber numbers.