ISO 3166-1 Territory

ISO 3166-1 is a standard defining a code for the names of countries, dependent territories, and special areas of geographical interest. We will use this terminology throughout this document instead of countries and territories. At sherpa°, we default to ISO 3166-1 alpha-3 unless stated otherwise.


When the customer’s ticket between two locations includes one or more locations in between where travellers have to disembark the airplane and board another one. The customer will not be leaving the airport in this scenario.


A transit or connection only applies when the customer has purchased the entire trip as a single ticket. This means they would usually not be required to collect their baggage and have them rechecked. If the trip is international, they may be able to stay in the international section of the airport without crossing the border control or customs gates.

Self Transit or Virtual Interlining

A technology used by travel companies that combines flights from different carriers that don't traditionally work together to go from point A to B via C. Travellers might also create their custom trip by booking separate tickets simultaneously to reach their final destination. The customer may leave the airport in this scenario to fly out from another airport in the same city.


The key difference with a regular transit described above is that it can result in some unique scenarios on international transits where a traveller must collect their baggage, pass through customs or border control, and re-check their baggage before carrying on to their next flight.

Multi-Connection trip

If a trip between an origin and destination has at least one connection or transit, excluding self transit or virtual interlining.

Multi-Segment trip

A trip that has multiple flights, and the traveller is able to leave the airport at each transit point, even if they stay inside the airport. All trips with self-transit or virtual interlining are multi-connection trips.

Domestic Flight

A flight between two points where the origin and destination and transit points are located in the same ISO 3166-1 Territory. For example, Toronto to Vancouver, New York to Los Angeles, Edmonton to Calgary, etc.


Sherpaº currently only supports domestic requirements for the United States, Canada, and Australia. Domestic requirements will only be shown on flights that take place wholly within these ISO 3166-1 Territory.

International Flight

A flight between two points where the origin and destination [or transit points] are located in a different ISO 3166-1 Territory. For example, London to Paris (the U.K. and France), New York to Tokyo (USA and Japan), etc.

All international travel requirements that apply will be shown on these trips.

International Transit

This is an international flight between two points where passengers are not formally entering the destination ISO 3166-1 Territory, but only transiting through on their way to a final destination.

For example, if one is flying from Toronto to Dubai with a layover in London, Toronto to London would be considered an international transit. International transit requirements will apply from Toronto to London and international flight requirements will apply from London to Dubai.

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