United Airlines to begin 787 Dreamliner flights to Denver on May 21

DENVER - United Airlines will start flying the 787 Dreamliner between Houston and Denver on May 21, according to USA Today.

In April, Federal regulators told U.S. airlines they could fly Boeing's 787 Dreamliners as soon as they replace its problematic lithium ion batteries with a revamped battery system.

United is the only U.S. airline that currently has 787s in their fleet. They have six. The FAA estimated the repair costs for those planes at $2.8 million.

The plane is important to Denver's economy, because United plans to use the 787 for a non-stop flight from Denver International Airport to Tokyo.

The flight was initially scheduled to begin in March. The start date has been delayed to June 10.

The 787's were grounded in mid-January, following a battery fire on a 787 parked at Boston's Logan International Airport, and a smoking battery that led to an emergency landing by another 787 in Japan.