In this data analysis, we compare the economics of the A321neo and A321ceo based on US Department of Transportation Form 41 data.Our study shows, much like the A320neo, that the A321neo has a 16.0% improvement in seat-mile costs and a 10.7% improvement in aircraft mile costs over the A321ceo over the period 2022 through 1Q 2025 for all US reporting carriers.
A better comparison is to utilize airlines flying both types, to avoid differences in seating configurations and differences in utilization.However, this is complicated by multiple layouts, as the A321 family
is used in transcontinental and international services with different requirements.
Complicating Factors
Seating densities range from 228 to 230 seat configurations at Spirit and Frontier to a 102-seat configuration at American for NYC-LAX trans-con flights.Delta has 192 seats in its configuration, while American offers 102, 181, and 187-seat variants.As a result, seat-mile comparisons can be apples to oranges, even within the same carrier, due to the varying aircraft configurations as the fleet expands.
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