Free Wi-Fi, but Speed Costs

As airlines try to persuade passengers to pay for Internet access at cruising altitudes, more airports and hotels are offering it free on the ground.

Half of the busiest airports in the United States now have free Wi-Fi, including Denver, Las Vegas, San Francisco, Phoenix and Houston. Dallas/Fort Worth plans to join that list in September, teaming with AT&T in a service that will give travelers 40 minutes of free Wi-Fi in exchange for viewing a 30-second advertisement. That type of sponsored access is one way airports are balancing consumer pressure for free access to Facebook, Twitter and e-mail accounts with the cost of providing a bigger pipe for growing data needs. As devices demanding Wi-Fi proliferate, airports and hotels are also turning to tiered pricing models: offering limited Internet access free and a faster premium service to customers willing to pay.