Travel policies specify when cover starts and stops, and those definitions decide a surprising number of claims. The trip as the policy understands it is rarely identical to the trip as the traveller experiences it.
Cancellation cover starts before the journey does
Most policies operate two distinct periods: cancellation cover running from the date the policy is issued, and journey cover running from departure to return.
That split is why a claim for a trip abandoned weeks in advance is assessed against different terms from one arising at the destination.
Understanding which period a problem falls in usually explains why one situation is covered and a superficially similar one is not.
Departure is defined by a physical event
Wordings typically fix the start of journey cover at leaving home, at reaching a departure point or at passing through a border control, depending on the product.
An incident on the way to an airport therefore may or may not fall inside the period, and the answer sits entirely in that sentence of the definition.
The same applies at the other end, where cover often ends on returning home rather than on landing, which matters for travel from the airport.
Annual policies add a duration limit
Multi-trip policies cover an unlimited number of journeys within a year but usually cap the length of any single one, commonly at a set number of days.
A journey exceeding that limit is not partly covered; the whole trip can fall outside the policy once the maximum is passed.
Extensions are sometimes available in advance, but arranging them after departure is generally not possible.
Extensions for delay are conditional
Where a return is prevented by circumstances beyond the traveller's control, many policies extend the period automatically for a limited number of days.
That extension usually applies only to specified causes such as transport disruption or medical necessity, not to a decision to stay longer.
Notifying the insurer promptly is normally a condition of the extension operating, which is why contact details matter more than policy documents at that moment.
Residence and departure country conditions
Policies are written for residents of a particular country and generally require the journey to begin and end there, which affects one-way and open-ended travel.
Trips beginning abroad, or taken by someone who has relocated, may fall outside the eligibility conditions entirely regardless of the destination.
These definitions vary between insurers and jurisdictions and are revised over time, so the individual policy wording is the only reliable source.