Looks like United is getting in on the 250th anniversary action with a new "Stars and Stripes" livery. They just painted it on a 787-10 and a 737-800 down in Amarillo.
The design has these wavy vertical red and white stripes plus 50 white stars covering the back third of the fuselage up toward the tail. Both planes are also carrying a commemorative plaque for United's active-duty service members and veterans.
Image below is owned by United Airlines.
Canon R6 Mark iii