According to 100.000 flights, Denver has to be closer north than London. And climate statistics support this.
No, the flights don't support that at all. Just the way you stuck it all together, completely ignoring errors.
The climate doesn't support it.
The simplest factor to use is sunlight hours.
The further north you are the more daylight hours you have during the northern summer and the less during the southern summer.
Far too many factors influence the temperature and the like, so unless the locations are basically the same, you wouldn't expect the same results.
Denver is in the middle of the US, far away from any ocean or large body of water.
London is right next to the English channel and quite close to Atlantic Ocean.
Istanbul divides the Black Sea from the Sea of Marmara, and is quite close to the Mediterranean sea.
That makes Denver quite incomparable in terms of temperature and precipitation.
But it is still perfectly fine to compare daylight hours.
It needs to be quite a significant mountain for that to effect it, and such a mountain would have the effect of increasing the time for both periods, which lets us confirm that isn't the case.
On the southern solstice, Denver received ~9 hours and 21 minutes of daylight, compared to London's ~7 hours and 50 minutes.
On the northern solstice, Denver received ~14 hours and 59 minutes of daylight, compared to London's ~16 hours and 38 minutes.
This conclusive proves beyond any sane doubt that London is much further north than Denver.
If your map says otherwise, it is wrong.
I have examined 100k flights by their flight times. I have examined about hundreds video about controversial flights.
So you don't demand videos for all flights, just the ones you don't like.
If you applied the same standards of evidence for all your flights, that would mean your map is actually just based upon about a hundred flights. But I suspect even that is an exaggeration.
And that still doesn't deal with the massive errors associated with such flights.