hub airport
An airport that serves as a central connecting point for flights, often used by airlines to concentrate operations. Compare with ハブ空港, which is a more common synonym.
See also: ハブ空港 (ハブくうこう)
Narita Airport is one of Japan's major hub airports.
その航空会社は関西国際空港を拠点空港として利用している。
That airline uses Kansai International Airport as its hub airport.