# The Boeing 757 has been United Airlines' transatlantic workhorse for more than three decades.

*business · news · 2026-04-11 · Simple Flying*

## Key points

- United Airlines will replace its aging Boeing 757 transatlantic fleet with the Airbus A321XLR.
- The A321XLR offers 30% lower fuel burn per seat compared to the 757, improving efficiency.
- United's A321XLRs will feature a new three-class cabin, including lie-flat Polaris suites.
- Certification delays have pushed United's first A321XLR delivery from 2024 to early 2026.
- The A321XLR enables United to serve smaller European cities previously unreachable by narrowbodies.

**Companies:** United Airlines, Airbus, Boeing
**Countries:** United States, United Kingdom, Ireland, Portugal, Germany, Iceland, Spain

[Read the full story on Simple Flying](https://simpleflying.com/which-aircraft-replace-united-airlines-iconic-boeing-757s/)

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