[brianpan]

The UX is giving me misery.

Most of the time the red fills in counter-clockwise. Until it is over 50%, then the red fills in clockwise.

Lots of the map circles actually represent MULTIPLE airports. But they still "represent" them with a three letter code. Sometimes by the largest airport (ORD, SFO), sometimes by a non-airport code (NYC), and sometimes by the second largest (DFW is larger that DAL).

Someone's pet project needs some more love.

EDIT: This version looks less like a pet project: https://www.flightaware.com/live/airport/delays

[jjmarr]

Just as a fun fact, there are IATA airport codes that designate cities instead of airport for purposes like this. NYC is one of them. So is YTO (Toronto) or CHI (Chicago, which should probably replace ORD).

[jen729w]

LON = London. Heathrow, Gatwick, Stansted, Luton, City, Southend.

[pasc1878]

and Biggin Hill(BQH) - Northolt does have some non RAF flights,

[sensanaty]

A lot of these are just airport code quirks, like LND being every airport in London. CGPGrey has a great video on the topic