Yes, primary cardholders of the United℠ Explorer Card are entitled to Priority Boarding on United-operated flights. This benefit places the cardholder and their travel companions on the same reservation into Group 2 of the boarding process. This is a significant advantage in 2026, as it virtually guarantees that you will find available overhead bin space for your carry-on luggage before the general boarding groups (Groups 3 through 5) enter the plane. To ensure you receive this benefit, you must include your MileagePlus number on your reservation at the time of booking; the system will then automatically print "Group 2" on your mobile or paper boarding pass. It is important to note that this benefit does not apply to United flights operated by partner airlines like Lufthansa or Air Canada. Along with priority boarding, the Explorer card offers a first checked bag for free and two one-time United Club passes annually, making it one of the most popular mid-tier airline credit cards for travelers who want to avoid the "Basic Economy" boarding scramble and the stress of gate-checking their bags.