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Run an Airline Fleet Planning: How Many Aircraft You Need

Fleet size should follow filled routes, not the other way round. Add an aircraft when every existing route is already covered and a new destination inside range is waiting; buying first usually produces two half-empty cabins instead of one full one.

The rule in one line

One aircraft per route you can keep filled. That is the whole fleet plan, and every other consideration is a refinement of it. A second aircraft adds seats; it does not add passengers.

The reviewed sessions show a single-aircraft airline at level 3 and a larger operation at level 15, which is consistent with fleet growth following route growth rather than leading it.

Fleet size against route coverage

TargetAircraft ownedRoutes you can coverSignal to grow
1 aircraftOne short-range typeOne sector, repeatableLoad factor above 75% twice in a row
2–3 aircraftSame type preferredTwo or three nearby sectorsCash per flight positive on every route
Mixed fleetTurboprop plus jetShort feeders and one longer sectorThe long sector beats a feeder on cash per hour

Why commonality matters here

Two aircraft of the same type can be compared directly: same seats, same range, same block time. That makes it obvious which route is underperforming. A mixed fleet removes that control, because a difference in result could come from the aircraft rather than the route.

Keep the fleet uniform until you have a route that genuinely cannot be served by the current type, such as a sector beyond 1,300 km for the ATR 42-600.

WORKFLOW

A simple growth test

1

Confirm the current routes fill

Every existing route should be at or above your target load factor.

2

Confirm every route is cash positive

A new aircraft cannot fix a route that loses money; it multiplies the loss.

3

Find a route with no aircraft

If a legal, unserved destination exists, a purchase has a purpose.

4

Keep a reserve after paying

Do not spend to zero; a fare experiment needs a buffer, not a loan.

QUICK ANSWERS

Fleet planning questions

Should I sell an aircraft I no longer need?

A sell or lease-back control was not observed in the reviewed sessions. Assume purchases are commitments and check your own client for a disposal option before buying a type you only need briefly.

Is a mixed fleet ever better?

Yes, once one route genuinely needs the range or seat count of a second type. The cost is losing the like-for-like comparison, so make the switch for a specific route rather than for variety.

How much reserve should I keep?

No official figure exists. A working rule is to keep enough cash to run your worst route twice at a loss, so a single bad experiment does not block the next repair.

Do more aircraft raise my level faster?

Level thresholds are not published. Fleet growth and level growth move together in the reviewed sessions, but no causal rule can be stated from two observations.

Sources and references

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