What makes an itinerary invalid is if it meets one of three conditions:
- A flight is longer than 7 days.
- It has overlapping flights in terms of its UTC times (i.e. two flights that are to be in the air at the same time.)
- Any flight arrival time is before its departure time.
- The departure airport of a flight does not match the previous arrival airport AND the passenger is departing from the same airport within 12 hours (this is a rare edge case).
- The flight number, departure and arrival information does not match a published schedule in our system.
This condition seems complicated, but its purpose is to identify when you're making the same point A to point B trip twice even if you are going via point C (e.g. PDX to LAS, then PDX to SEA and SEA to LAS) without invalidating co-terminal connections (it is perfectly valid to fly into LGA and out of JFK) or short business trips (e.g. SEA to PDX to LAX then LAX to PDX to SEA a few hours later.)
Please note: If only one leg of the trip is determined as invalid, it will not be monitored but other legs of the trip that are will be monitored and provided alerts for.