Airport dwell time: the metric that determines non-aeronautical revenue

Dwell time is the total time a passenger spends inside the terminal - from arrival at the airport to boarding the aircraft. For airport managers, this time has two very different dimensions.

Processing time covers mandatory activities: check-in, security screening, immigration, customs. The passenger has no choice but to be there.

Free time is what remains once all formalities are complete - the discretionary window before the flight. This is the commercially productive time.

What research reveals is counterintuitive: active processing time represents only about 4% of total terminal time. Roughly 25% is time spent waiting in queues. The remaining 71% - nearly three quarters - is discretionary.

This means more than two thirds of the time passengers spend in your airport is theoretically available for commercial engagement. The question is: how much of it is actually being captured?

The most robust quantitative evidence on the dwell time-revenue relationship comes from a 2024 study published in the Journal of Air Transport Management. Researchers analyzed panel data from 89 US airports over multiple years to establish the causal elasticities.

The findings establish a clear, statistically significant relationship across revenue categories. The key number: a 10% increase in dwell time produces a 5% increase in total non-aeronautical revenues.

The relationship is not uniform across categories. Food and beverage responds more strongly than retail - because eating and drinking require time and cannot be compressed into a rushed transaction the way a quick purchase can.

Importantly, terminal design mediates the effect. Linear and finger-pier airport layouts show significant dwell time elasticity. Concourse-type airports show no statistically significant effect - meaning that in those cases, simply extending dwell time is not enough; the commercial strategy needs to be fundamentally different.

If free dwell time drives commercial spending, queue time does exactly the opposite. Research on airport passenger experience shows that every 10 extra minutes a passenger spends in a processing line - security, immigration, or check-in - reduces their subsequent commercial spending by 30%.

This is not a marginal effect. If the average security wait time increases from 5 to 15 minutes, that is an estimated 30% reduction in spending among passengers caught in that demand peak.

The impact operates through two separate channels.

The commercially richest segment of dwell time is the period between clearing security and boarding. Call it the golden window.

In this period, passengers have completed all mandatory formalities. Security anxiety begins to dissipate. The time remaining before the flight creates a voluntary activity window. Exposure to commercial zones is at its maximum.

Airport design has exploited this for decades: layouts route all passengers through commercial areas, seating is integrated near retail, flight information screens are placed in trading zones to relax passengers (informed passengers are relaxed passengers; relaxed passengers spend more).

What threatens this window is friction at upstream processing points. Every minute added to security or immigration directly reduces the golden window - and with it, the commercial revenue opportunity.

Asia Pacific is the most developed travel retail market in the world - representing 43% of global non-aeronautical revenue. What is happening there should be a warning for every airport operator.

According to a 2024 report by Kearney for the Tax Free World Association (TFWA), average dwell time in Asia Pacific fell from 125 minutes in 2018 to 104 minutes in 2024 - a 16% decline. But free airside time - the commercially productive window - fell even faster: from 60 minutes to 44 minutes, a 26% decline in six years.

The result: despite a 12.5% increase in passenger volumes in 2024, Asia Pacific travel retail revenues contracted by 2%. Spend per passenger fell from $24.30 to $15.50.

More passengers are not translating into more revenue. The operational friction that is compressing the free time window is eroding the commercial opportunity faster than passenger growth can compensate.

The core principle is simple: you cannot manage what you cannot measure. Airports that know in real time how long their passengers are waiting at each friction point - and how long they are spending in commercial zones versus processing areas - have a direct lever on their non-aeronautical revenues.

PAX flow analytics applied to existing security cameras delivers a continuous, anonymous, real-time picture of passenger movement and time allocation throughout the terminal.