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 Hô Chi Minh-Ville 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.
EdmontonYEG · Canada12−30 %1 bookable
SaskatoonYXE · Canada12−30 %seen Nov 6
LondonLHR · United Kingdom8−30 %seen Nov 8
VictoriaYYJ · Canada6−30 %seen Nov 5
CalgaryYYC · Canada6−20 %1 bookable
San DiegoSAN · United States5−30 %seen Oct 31
OttawaYOW · Canada5−30 %seen Oct 30
ReginaYQR · Canada5−30 %1 bookable
WinnipegYWG · Canada5−30 %seen Oct 9
VancouverYVR · Canada5−20 %seen Oct 22
San FranciscoSFO · United States4−40 %seen Nov 3
HoustonIAH · United States4−30 %seen Oct 28
Quebec CityYQB · Canada2−40 %seen Oct 30
MontrealYUL · Canada2−30 %1 bookable
KelownaYLW · Canada2−20 %1 bookable
BostonBOS · United States1−40 %seen Sep 29
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.