United Airlines and JetBlue have activated a key feature of their Blue Sky collaboration, allowing members of their respective loyalty programs, MileagePlus and TrueBlue, to earn and redeem points or miles across both airlines' networks. This integration provides TrueBlue members access to United's extensive global network, while MileagePlus members can now use their miles for flights on JetBlue, known for its leisure destinations. The airlines have positioned this as the first major customer benefit to roll out from their partnership, aiming to offer greater flexibility and more rewarding travel experiences. When searching for award flights on either airline's website or app, customers will now see options available on both carriers. This move is designed to increase customer loyalty and attract more travelers by expanding the utility of their earned miles. Further benefits of the collaboration are expected to be introduced in phases. The airlines have indicated that the ability to book revenue tickets (using cash) for itineraries on either airline is planned for the first quarter of 2026. No immediate market reaction or analysis on UAL's stock price related to this specific announcement was available.