Offering Internet connectivity for laptops, PDAs, and smartphones on nine of the 11 leading American airlines, GoGo Inflight remains the leader in in-flight Wi-Fi. Its parent company, Aircell, received $35 million in additional funding in February to expand growth in the business and aviation market. As business travelers begin to book flights while taking into consideration which airlines offer Internet connectivity, the market share here should continue to grow.

COST: Offering multiple payment plans, from $4.95 depending on the length of the flight, to $34.95 per month.