Pago Pago International Airport lies in the tropics at 14.33° S, 170.71° W, on Pacific/Pago_Pago time (UTC-11). Tropical airports contend with heat and humidity, both of which thin the air and lengthen takeoff runs, and with convective storms that build fast in the afternoon.
Pago Pago International Airport has 2 runways. The longest, 05/23, measures 10,000 ft by 150 ft, which puts the field in the long-haul capable category: widebodies operate comfortably, though the very longest sectors may need a payload trade. The surface is asphalt. Both are lit for night operations.
Runway 05/23 is aligned roughly north-east/south-west, which is the clearest hint you get about the prevailing wind here: runways are built to face the wind that blows most often, because aircraft take off and land into it. With 2 runways across 2 different headings, crews can pick whichever best suits the wind.
The runways are not interchangeable. 08/26 is 3,800 ft against 05/23's 10,000 ft, a difference of 6,200 ft, so the shorter one generally takes regional traffic while the longer handles anything heavy.