Layover Time Calculator

Assess whether a layover is long enough to make the connection.

About Layover Time Calculator

The usable layover is the scheduled gap less the expected arrival delay, and the required time includes boarding closing well before departure. Immigration on international connections is usually the largest single component. Self-connecting on separate tickets removes the airline’s obligation to rebook, which makes the buffer a financial exposure rather than an inconvenience.

Formula

Layover Time

Buffer = layover − arrival delay − transfer − immigration − boarding close

boarding close: Gates typically close 15 to 30 minutes before departure
effective layover: Scheduled layover reduced by the expected arrival delay

Worked example

With the default values below, Layover Time Calculator returns Buffer Remaining of 5. Change any input above and every figure here is recalculated in your browser.

Inputs used

Scheduled layoverminimum 0 min: 95 min
Terminal transfer timeminimum 0 min: 25 min
Immigration and security timeminimum 0 min: 30 min
Boarding closes before departureminimum 0 min: 20 min
Expected arrival delayminimum 0 min: 15 min

Results

Buffer Remaining: 5 min
Minutes Required: 75 min
Effective Layover After Delay: 80 min
Connection Risk: High — almost no margin for any further delay
Recommended Minimum Layover: 120 min

Step by step

1Values used
2Layover Time
3Buffer Remaining= 5 min
4Minutes Required= 75 min
5Effective Layover After Delay= 80 min
6Connection Risk= High — almost no margin for any further delay
7Recommended Minimum Layover= 120 min

Assumptions and limits

The result is derived only from the 5 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is Layover Time calculated?

Buffer = layover − arrival delay − transfer − immigration − boarding close The usable layover is the scheduled gap less the expected arrival delay, and the required time includes boarding closing well before departure. Immigration on international connections is usually the largest single component.

Why does Layover Time matter?

Self-connecting on separate tickets removes the airline’s obligation to rebook, which makes the buffer a financial exposure rather than an inconvenience.

What values do I need to enter?

This calculator takes 5 inputs: Scheduled layover, Terminal transfer time, Immigration and security time, Boarding closes before departure, Expected arrival delay. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.