This is not what the manufacturers are saying, but we will see.

Don't forget, the majority of these are not growth, but to replace an outdated fleet. United keeps forgetting to mention that.

71 - Airbus 320s that will be ~26 years old in in 2023
32 - 767-300s that will be ~28 years old in 2023
21 - 757-200s that will be ~27 years old in 2023

United has one of the most outdated fleets in the industry. It will take a decade, and billions of dollars to replace all of this, especially with the delivery delays and supply chain shortages that will delay manufacturing for the next 3-5 years.

Once all 83 of the 757/767 are gone by 2024, wide body flying at UAL will be much different than it is today.