MONTREAL--(BUSINESS WIRE)--JustFly, a leading North American online travel agency, today announced a new partnership with Frontier Airlines that gives travelers more affordable flight options and a smoother booking experience. The collaboration connects JustFly directly to Frontier's fares and ancillary products, allowing customers to easily browse, compare, and book ultra-low-cost flights in real time. This partnership marks a key milestone in JustFly's mission to make travel simpler and more. ...