United Airlines is gearing up to introduce its Airbus A321XLR fleet in summer 2026, following delays from its initially planned early-2026 roll-out. The airline has ordered 50 of these long-range narrow-body jets, a key component in replacing its aging Boeing 757-200s and expanding its transatlantic and Latin American route map.

United Airlines A321XLR Coming In 2026

According to recent disclosures, the A321XLR is expected to feature:

• 20 Polaris (business class) seats
• 12 Premium Plus (premium economy) seats
• 36 Economy Plus (extra legroom) seats
• 82 standard economy seats

That’s a 150-seat configuration, offering a three-class experience on a single-aisle aircraft.

Here’s the “Location of Passenger Accommodations” (LOPA), a fancy name for a seat map, shared by JonNYC:

We saw sketches of the new seat last year in a patent filing by United and the updated LOPA suggests United downsized the business class cabin from 28 seats to 20 seats (or possibly that United will have multiple configurations):

> Read More: United Airlines Tips Hand On New A321XLR Polaris Seat (Pictures)

Polaris Business Class: New Seat Onboard

United is introducing an all-new Polaris business-class seat tailored for narrow-body aircraft. Designed with a herringbone layout at a 49° aisle orientation, these seats offer:

• Just 28 inches of pitch, yet a generous 75–78 inch fully-flat bed (you sit angled, so practically there is a lot more legroom)
• A creative “space-sharing region” allowing shoulder-level space on one side and lower-arm space on the other (increases cabin density)
• Privacy doors, as inferred from patent filings (I covered this last year)
• Likely based on the Adient Altitude seat design, making it unique to United unless licensed

While this is a densified configuration comparable (or even denser) than JetBlue Mint, it may lack the spaciousness of reverse-herringbone designs. As I previously reported, the seat is a pragmatic attempt to balance capacity with comfort.

Routes & Strategy

The A321XLR’s range will enable operations on “long and thin” routes, like Newark to Bogota or smaller European cities like Edinburgh. The strategy helps United explore new markets cost-effectively while improving fuel efficiency. It also improves passenger comfort over the 30-year-old Boeing 757-200 aircraft in all cabins (the 757s do not have premium economy).

This move aligns with United’s broader “Next” fleet strategy, which aims to modernize and expand its narrowbody and widebody offerings, adding over 500 narrowbody aircraft over the next decade.

I also hope we will see this aricraft operate premium service routes between Newark and San Francisco (SFO) / Los Angeles (LAX)…and eventually New York (JFK) in 2027.

Key United A321XLR Facts

A statement from United executives during the Q2 2025 earnings call confirmed that the A321XLR delivery won’t happen “this year, nor at the top end of 2026,” pushing the expected entry to summer 2026.

CONCLUSION

For passengers, the A321XLR brings Polaris-level comfort to narrowbody service, an attractive combination for longhaul routes with lower demand and a big upgrade over the 757-200. It also marks a broader trend of utilizing “Goldilocks” narrowbody aircraft to target routes that might not be large enough for a widebody jet.