飞行的 WT6991 索非亚机场（索非亚） – 科隆机场（科隆）由Swiftair 3%次：期三, 期四, 期五。
航班時間是3小时 53分钟。
回程航班： FR4452, FR8646, WT6992,
所有航班索非亚 — 科隆
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