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 Philadelphie 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.
AtlantaATL · United States21−50 %1 bookable
ChicagoORD · United States13−50 %1 bookable
HoustonIAH · United States10−40 %seen Oct 5
MinneapolisMSP · United States7−50 %seen Oct 3
DallasDFW · United States7−40 %seen Oct 8
ReginaYQR · Canada5−20 %seen Oct 1
MiamiMIA · United States4−40 %seen Sep 30
DenverDEN · United States4−30 %seen Sep 28
PhoenixPHX · United States3−30 %seen Oct 7
Las VegasLAS · United States2−50 %seen Oct 1
OrlandoMCO · United States2−40 %seen Sep 26
Fort LauderdaleFLL · United States1−20 %seen Sep 26
LondonLHR · United Kingdom1−20 %seen Sep 19
LisbonLIS · Portugal1−20 %seen Sep 20
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 September.