United Airlines announced the next step in its commitment to making more customers more comfortable by adding more than 1,600 United Polaris® business class and United First seats to nearly 250 international and domestic aircraft. Additionally, United will revolutionize the regional flying experience by introducing the two-cabin, 50-seat Bombardier CRJ 550 aircraft to its fleet, offering customers on key regional routes more legroom, storage and amenities than any other 50-seat regional aircraft operating today.