Flypolicy is all about airline flight booking services, and they offer all types of flight services. United Airlines is a major airline in the United States. After American Airlines and Delta Air Lines, it is the world's third-largest airline by revenue. When you travel frequently, The several airline services give the best deals and discounts on reservations. Airlines' policies fluctuate significantly from one another and from country to country. Flypolicy is a third-party company that provides information on various airline policies.