開放天空是一項民用航空政策,旨在減低政府對航空政策的干預,消除國內國與國間飛航的經營限制、或者降低航空公司的成立門檻,來營造自由的航空營商環境。美國在1979年實施開放天空政策後,航空公司紛紛成立,旅客有更多的選擇。此後美國向各國積極推行開放天空。

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