Tip: Use Your Apple Watch as a Boarding Pass
Alex Lindsay has a tip for using the Apple Watch on United flights. If you want to check in for your flight using your watch, you'll need to send your boarding pass from the United app to the Wallet app. Then you can get your boarding pass on the Apple Watch and scan that as you board.
If you want to make it even easier to use your Apple Watch as your boarding pass, Alex recommends flipping the watch around and wearing it face-down. That way you don't even need to turn your wrist to scan the boarding pass on the watch face.