Frontier Airlines will deny flights to passengers with high temperatures.The airline announced Thursday it will screen passengers with touchless thermometers prior to boarding.A person with a temperature of 100.4 degrees Fahrenheit or higher will be denied boarding, starting June 1.Those who fail the screening will have the chance to rest if there's time and given a second check. If that's unsuccessful, the company said it will work with a customer to rebook a flight. Video: Travelers take airlines' mask requirements in strideThe move comes as the airline, like others, is requiring fliers to wear face masks beginning Friday.