The contest had a specific set of rules and a 4-month itinerary was permissible within these rules. The point wasn't to create an itinerary that would be advisable for a particular individual, it was to demonstrate that FlightFox is a good tool for finding rock bottom prices, so any set of fair rules would work.
If you were actually making an itinerary for someone, you'd probably have even more pressing questions than trip duration, such as "Where would you like to go?" Do you even want to go 6 continents? :)
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The contest had a specific set of rules and a 4-month itinerary was permissible within these rules. The point wasn't to create an itinerary that would be advisable for a particular individual, it was to demonstrate that FlightFox is a good tool for finding rock bottom prices, so any set of fair rules would work.
If you were actually making an itinerary for someone, you'd probably have even more pressing questions than trip duration, such as "Where would you like to go?" Do you even want to go 6 continents? :)