When flying out of O'Hare for the holidays, you will be greeted by an adorable puppy dog.

It's no surprise to anyone that flying for the holidays is extremely stressful.

Airports become more crowded due to the abundance of people going to see their families for Christmas. Airport security lines are long, magazines run out at the kiosks in the airport and lost luggage is sure to happen.

In order to help ease the stress of some flyers, United Airlines have brought in the professionals. United Airlines has brought cute, cuddly, four-legged friends known as comfort dogs.

Matt Cardy, Getty Images

Over 230 comfort dogs have been deployed to seven different airports across the country including O'Hare Airport in Chicago. The pups help reduce stress and anxiety for holiday travelers.

If you are traveling United Airlines from O'Hare, Cleveland, Denver, Houston, Los Angeles, Newark or Washington/Dulles airports between December 21-23, you can expect to see a few cute pups!