Capacity has to fit the network
Too many seats can dilute fares, while too few can constrain growth. Airlines model expected demand across many routes rather than selecting an aircraft for one city pair.
Range must come with useful payload
Published maximum range is only part of the story. Airlines care about how many passengers and how much cargo the aircraft can carry under real runway, weather and reserve-fuel conditions.
Fuel burn shapes long-term economics
Small efficiency differences become significant over thousands of flights. Fuel price assumptions therefore play a major role in fleet evaluations.
Commonality can outweigh isolated performance advantages
A new type may offer excellent economics but require separate pilot training, maintenance tooling and spare parts. Existing fleet families can have a strong advantage.
Purchase terms change the equation
Discounts, financing, maintenance support and delivery timing are negotiated as part of large campaigns. The sticker price rarely describes the airline’s real acquisition economics.
Flexibility matters because forecasts will be wrong
Airlines value aircraft that can move among several route types as demand changes. A versatile fleet reduces the risk of being locked into one narrow market assumption.
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