In-flight Wifi for 43% off
You will find GoGo WiFi on select flights by Air Canada, AirTran, Alaska, American, Continental, Delta, United, US Airways, and Virgin America. Soon, Frontier will join the fray. I've used GoGo in-flight WiFi and found the connection to be quite fast. It cut out one or twice but came back very quickly and was not a big deal.
GoGo WiFi starts at $5-$13 per flight, depending on the length of the flight. If you were to purchase two WiFi passes of $13 each on a cross-country trip, it would make better financial sense to buy a 30-day pass for $20.