OAG top airport megahubs, 2026
(Based on connectivity: how many 1-stop connections can be made within 6 hours at that airport)
1 IST 2 LHR 3 AMS 4 KUL 5 ORD
6 ICN 7 FRA 8 HND 9 CDG 10 ATL
11 SIN 12 BKK 13 BOG 14 PVG 15 DFW
16 JFK 17 MIA 18 MAD 19 CAN 20 HKG

*Airside*/within-terminal people movers like at DEN that are necessary to reach some subset of gates are much more common (despite @alonlevy.bsky.social's claim upthread). ATL, CDG, DXB, HKG, IAD, ICN, LAS, LHR, MAD, MUC, PEK, PVG, SEA, STN, ZRH...

(Full list of airports where I have used the rail link: AMS ATH ATL BCN BER BKK BRU BUR BWI CAG CDG CLE CPH CTS DCA DEN DUS EWR FRA GMP GRZ GVA HKG ICN JFK KIX LCY LEJ LGW LHR LIS MAD MAN MIA MSP MUC MXP NRT OAK OSL PDX PEK PHL PHX PVG SEA SFO SIN STN SYD TLV VIE YVR)

#ICAO: #78044E Owner: #AIR CHINA CARGO Flt: #CAO8403 #B-6115 #A332 #PVG-MAD-CDG Time: 2026-01-31 05:50:09 CET Min Alt: 10000 ft Min Dist: 8.71 nm (164° SSE) #Squawk: 1000 #dev #adsb #planefence by kx1t -•sdr-e•airplanes•flightaware

#ICAO: #780092 Owner: #AIR CHINA CARGO Flt: #CAO8403 #B-6090 #A332 #PVG-MAD-CDG Time: 2026-01-24 13:30:03 CET Min Alt: 9875 ft Min Dist: 8.5 nm (158° SSE) #Squawk: 3524 #dev #adsb #planefence by kx1t -•sdr-e•airplanes•flightaware