The identical car from the identical company can differ substantially in price between an airport counter and a branch a few kilometres away. Several distinct mechanisms produce that gap.
Airport locations carry concession costs
Operating a desk at an airport requires a concession agreement, and the fee is typically calculated as a share of the revenue generated there.
Shuttle buses, parking structures and extended opening hours add further costs that a suburban branch with a small lot does not carry.
Those costs appear on the rental agreement as separately itemised facility and concession recovery charges rather than being folded into the daily rate.
Fleets drift out of balance geographically
Rental companies plan fleet distribution against expected demand, but customer behaviour moves cars in ways that do not cancel out.
A branch accumulating surplus vehicles discounts aggressively to move them, while a branch running short raises prices to ration what it has.
Because this is measured location by location, two branches in the same city can be pricing in opposite directions on the same morning.
One-way rentals carry a repositioning cost
A car dropped in a different city must either be rented back along the same route or physically returned, and returning it costs a driver and fuel.
One-way fees reflect the expected cost of that correction, which is why some routes are cheap in one direction and expensive in the other.
Popular seasonal migrations produce the clearest examples, with heavy discounting in the direction the company needs cars moved anyway.
Demand type differs by location
Airport renters are disproportionately business travellers and arriving visitors with little flexibility and no realistic alternative.
Downtown branches serve local customers replacing a car under repair, and those customers compare prices and can simply not rent.
Different willingness to pay in each population supports different pricing, and companies segment accordingly rather than setting one city rate.
Where the saving is real and where it is not
A cheaper downtown rate is only a saving after the transfer to reach it, and a taxi with luggage can consume most of the difference on a short rental.
On longer rentals the fixed transfer cost is spread across more days, so the same decision that fails on two days succeeds on ten.
Return timing is the other trap, since a suburban branch with limited hours can force an extra day or an awkward early return that undoes the benefit.