What are some common airport and country codes?

Top 30 Country Codes (by population) 

Top 30 Populous Country Codes - Salt Atlas

 

Top 30 Airport Codes (busiest airports)

Hartsfield-Jackson Atlanta International Atlanta, Georgia, USA ATL
Beijing Capital International Airport Beijing, China PEK
Los Angeles International Airport Los Angeles, California, USA LAX
Tokyo Haneda Airport Tokyo, Japan HND
Dubai International Airport Dubai, UAE DXB
O'Hare International Airport Chicago, Illinois, USA ORD
London Heathrow Airport London, UK LHR
Shanghai Pudong International Airport Pudong, Shanghai, China PVG
Charles de Gaulle Airport
Île-de-France, France
CDG
Dallas / Fort Worth International Airport Dallas-Fort Worth, Texas, USA DFW
Guangzhou Baiyun International Airport Guangdong, China CAN
Amsterdam Airport Schiphol North Holland, Netherlands AMS
Hong Kong International Airport Hong Kong, China HKG
Frankfurt Airport Frankfurt, Germany FRA
Denver International Airport Denver, Colorado, USA DEN
Seoul Incheon International Airport Incheon, South Korea ICN
Singapore Changi Airport Changi, Singapore SIN
Indira Gandhi International Airport Delhi, India DEL
Suvarnabhumi Airport Samut Prakan, Thailand BKK
Soekarno-Hatta International Airport Banten, Indonesia CGK
John F. Kennedy International Airport Queens, New York, USA JFK
Kuala Lumpur International Airport Selangor, Malaysia KUL
Madrid Barajas Airport Barajas, Madrid, Spain MAD
San Francisco International Airport San Mateo County, California, USA SFO
Chengdu Shuangliu International Airport Chengdu, Sichuan, China CTU
Shenzen Bao'an International Airport Shenzen, Guangdong, China SZX
Barcelona - El Prat Airport Barcelona, Spain BCN
Istanbul Airport Istanbul, Turkey IST
Seattle-Tacoma International Airport SeaTac, Washington, USA SEA
McCarran International Airport Las Vegas, Nevada, USA LAS
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