Originally Posted by david_oz

any recent data points on how good the algorithm is in detecting these duplicates?

I have AAA-BBB booked. Flight departs AAA on Nov 30 at 8pm, arriving in BBB around 1am. If I booked AAA-CCC departing Dec 1 at 6am, is this likely to be detected as an impossible booking? The reason for the duplicate is I have a work trip to CCC, but I don't want to lose the reservation to BBB because the work trip has some risk of cancellation and I need a way back home after thanksgiving when flight prices will be significantly higher than what I already paid