Yes. United Starlink Wi-Fi is free for MileagePlus members, and joining MileagePlus is free.
On board, connect to the Wi-Fi network and sign in with your MileagePlus number, or join on the spot. You don't need to buy anything or have status.
Fast enough to stream, with coverage over oceans.
618 of 1,675 United Airlines aircraft have Starlink today. Most of the rest have an older system, usually slower and often paid, and a few have no Wi-Fi. The fleet page shows every aircraft.
Check your flight:
Rollout progress is on the timeline.
Live TV on the seatback screen needs more than Starlink. See which planes have it.