More people are starting to use airlines again amid the loosening of restrictions across the globe, and the introduction of COVID-19 airline guidelines.

Packed-in passengers might not be the normal right now, according to major airlines, but as more people begin to fly again there are concerns about whether passengers can maintain social distancing while flying.

New U.S. Department of Transportation guidelines have been rolled out for airline companies, including a guideline that says changing or canceling a flight because of coronavirus does not entitle customers to a refund.

However, the guidelines do say customers can get their money back within a week if the airline cancels their flight.

In the U.S. more than half of all airliners are now parked, but more passengers are stepping on board a shrinking fleet.

The number of people passing through security has climbed to the highest level in six weeks.

Frontier Airlines CEO Barry Biffle says his company is already starting to see an increase in customers.

"We're already seeing visiting friends and relatives, kind of the back-bone of our business, we're starting to see that come back. But it's at a very small level," Biffle says.

 

United Airlines announced it will warn passengers if a flight is near capacity and let them rebook, even though United stresses that most flights are less than half-full.

All major airlines are now mandating that passengers wear masks, but are not guaranteeing that every middle seat will be empty.

Rep. Peter DeFazio, and Chairman House Transportation and Infrastructure Committee says the federal government needs to step in.

High-ranking house democrats say there is "inconsistency" and "uncertainty" in airline policies and they want federal agencies to act.