There's no in-flight service but these pooches don't mind - just the fact they're still alive is a miracle. Each year thousands of homeless pooches facing euthanasia - some hours away from death - get loaded on planes and flown to new homes in places where shelters are experiencing shortages. Groups such as California-based Wings of Rescue or South Carolina-based Pilots N Paws recruit pilots to volunteer their planes, fuel and time. The two non-profits say their concept has been a roaring success with the numbers increasing year-on-year. It's estimated that more than 4 million U.S. pets are euthanized every year. Scroll down for video . Pilot pooch, do you read me? Each year thousands of homeless dogs facing euthanasia - some hours from death - get loaded on planes and flown to new homes in places where shelters are experiencing shortages . Both pilot groups encourage spaying and neutering as a solution but know that airlifts will increase every year as they become more visible and the number of needy dogs grows. States such as California, Georgia and South Carolina typically have too many dogs in shelters, while places such as Washington, Oregon, New York, New Jersey and Florida need more pets to satisfy demand. To solve the location conundrum, pilots fire up their engines. In Coeur d'Alene, Idaho, retirees want smaller dogs, which are easier to take care of but a tough find in the area with the high demand. So, the Kootenai Humane Society orders a planeload of dogs under 16 pounds every month, or more than 1,000 animals in the last 16 months, executive director Debbie Jeffrey said. Window seat: Groups such as California-based Wings of Rescue or South Carolina-based Pilots N Paws, recruit pilots to volunteer their planes, fuel and time . In safe hands: In this December 2014 photo provided courtesy of ShelterMe, pilot Jim Nista delivers Finn, a rescued dog, in Everett, Washington . Saved from peril: It's estimated that more than 4 million U.S. pets are euthanized every year . 'It's just been a real success. As fast as they come in, they are adopted,' she said. The successes increase as more pilots sign up to help. 'We have seen the number of animals rescued go up every year since we started in 2008,' said Kate Quinn, executive director of Pilots N Paws. The group's 5,000-plus pilots have flown more than 15,000 dogs to new homes each of the past two years, relocating more than 75,000 animals over the last seven years, she said. And the numbers keep rising. Growing trend: Wings of Rescue and Pilots N Paws encourage spaying and neutering as a solution but know that airlifts will increase every year as they become more visible and the number of needy dogs grows . Snuggled up: It's reported that most pooches sleep in the air and don't get sick . 'Pilots love a reason to fly. They love making these flights,' Quinn said, adding that all dogs have to be spayed or neutered, microchipped and vaccinated before they take off. Yehuda Netanel, founder and president of Wings of Rescue, says business has doubled each of the past four-and-a-half years. He started as the lone pilot who rescued 300 dogs, and now the group expects to fly 7,000 pets in 2015, he said. The pilot of 27 years will charter planes to move dogs if there aren't enough private planes, meaning flights cost about $80 per dog. Netanel and his 28 pilots are preparing to take flight this weekend with 250 dogs from San Bernardino, 150 from Bakersfield and smaller numbers from other locations. Packing them in: Kootenai Humane Society orders a planeload of dogs under 16 pounds every month, or more than 1,000 animals in the last 16 months . Puppy-dog eyes: 'We have seen the number of animals rescued go up every year since we started in 2008,' said Kate Quinn, executive director of Pilots N Paws . Pilots Kale and Anj Garcia of Seattle will be in San Bernardino to bring as many as 50 dogs back to Washington state in their seven-passenger Cessna 414. The couple have flown 16 missions for Wings of Rescue. Most dogs sleep during the flight, and only a few have had air sickness, said Anj Garcia, who will take each one out of its crate and cuddle it during the journey. The flights allowed Cathy Parker of Coeur d'Alene to find her dogs: Bella, a poodle-Chihuahua mix, and Sidney, a poodle-Pomeranian mix, who Wings of Rescue delivered from different shelters about nine months apart. 'They've been a real good match for each other and me,' she said. Pet taxi: In this Nov. 22, 2014 photo, Steven Latham, founder of Shelter Me, helps pilot Yehuda Netanel, founder of Wings of Rescue, load a shelter pup onto a private plane at the Van Nuys airport in Los Angeles . Paws for celebration: In the last two years, Wings of Rescue have flown more than 15,000 dogs annually to new homes and have relocated more than 75,000 in seven years .
Groups such as California-based Wings of Rescue or South Carolina-based Pilots N Paws, recruit pilots to volunteer their planes, fuel and time . The two non-profits say their concept has been a roaring success with the numbers increasing year-on-year . All dogs have to be spayed or neutered, microchipped and vaccinated before they take off . It's reported that most pooches sleep in the air and don't get sick .