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Flight itinerary planning involves arranging cities in the desired sequence of a trip from origin to destination, following three basic rules: avoid crisscrossing, backtracking, and using fewer carriers. There are four types of flights: non-stop between two cities without stops, direct with a stop but no plane change, connecting with a plane change, and changing equipment/gauge with a plane change between the same aircraft type. Flight itineraries can be one-way, round-trip, open-jaw with different origin/destination points, or circle with multiple extended stopovers returning to the origin city.









