Over twelve months: where the drops came from, how often, and how far. Past deals are no longer bookable and so are not links — what they add here is the pattern.
Where the deals to San Diego came from
The bar says how often a drop has been proven from that airport over twelve months. The badge says how far the price fell.
PhoenixPHX · United States32−50 %1 bookable
San FranciscoSFO · United States32−50 %1 bookable
BostonBOS · United States20−50 %2 bookable
HoustonIAH · United States19−50 %seen Nov 6
Las VegasLAS · United States17−50 %seen Nov 7
EdmontonYEG · Canada16−40 %seen Nov 3
DallasDFW · United States14−50 %seen Nov 5
Thunder BayYQT · Canada13−50 %1 bookable
HalifaxYHZ · Canada11−40 %seen Nov 3
St. John'sYYT · Canada10−50 %seen Nov 7
SaskatoonYXE · Canada10−40 %seen Nov 6
KelownaYLW · Canada9−40 %seen Oct 29
DenverDEN · United States8−50 %seen Nov 3
SeattleSEA · United States8−40 %seen Nov 3
Quebec CityYQB · Canada7−50 %seen Nov 1
AtlantaATL · United States6−50 %seen Oct 31
When the deals show up
A bar’s height is the number of drops spotted that month, its colour the month’s best discount. The tallest is October.