United Airlines is reportedly preparing to give its 21 Boeing 757-300s the full United Next cabin treatment — the last major narrowbody in the fleet still flying with an outdated interior. The plan surfaced via aviation analyst JonNYC on November 10, 2026, quoting what looks like United's own modification paperwork, though the airline hasn't formally announced anything or confirmed a timeline.

The changes are substantial for planes averaging around 24 years old. Every seat gets its own entertainment screen — a Panasonic AVOD system — plus in-seat power throughout the cabin, which is a real upgrade: power is currently limited to rows 1 through 23, and entertainment relies entirely on streaming to your own device. United actually ripped out seatback DIRECTV screens years ago as a cost-saving measure, so this effectively reverses that decision.

Storage gets a boost too. The current overhead bins are small enough that standard carry-ons often have to go in sideways. The new Boeing Space Bins should hold noticeably more luggage, easing the gate-check scramble that plagues these flights. Seats themselves will be refreshed along with new dividers, cabin headers, and updated branding — though the total seat count stays at 234, split between 24 first-class, 54 Economy Plus, and 156 economy seats.

Why the wait? The Space Bins were never certified for the 757-300, and with only United and Delta operating the type in the US, suppliers had little reason to fund the engineering work themselves. United had to lead it, which is why the 757-300 fell behind the Airbus and 737 fleets in the retrofit queue. United's broader United Next program, announced in June 2021, aimed for 99% completion by summer 2025 — but by March 2026 the airline reported just 70% of narrowbody work done.

The fleet's fate is an open question. Investing in cabin hardware usually signals an airline plans to keep an aircraft around, but the A321 and 737 MAX 10 are slated to replace the 757-300 eventually, so this may be a bridge while those deliveries catch up.

For travellers, this matters most on the routes these planes fly: San Francisco to Chicago, Los Angeles to Washington Dulles, and Los Angeles to Chicago — all long, high-demand domestic sectors where the product gap between aircraft types is most obvious. Once the work is done, booking a United narrowbody should mean a more predictable experience regardless of which plane shows up. Until then, expect the old cabin on some 757-300 flights.

Simple Flying