Phoenix Sky Harbor International Airport is getting nonstop service to LaGuardia Airport in New York, courtesy of Southwest Airlines (NYSE: LUV). It will be the only nonstop service to LaGuardia offered at Sky Harbor. Flights begin April 14, 2018, and will only be available on Saturdays. Other airlines offer LaGuardia flights to and from Sky Harbor but have a stop. Fares are currently as low as $280 on the new route and are effective until June 1.