Travel Service Airlines

February 2010. "Contacts （页面存档备份，存于互联网档案馆）." Travel Service Airlines. Retrieved on 14 November 2011. "Travel Service, a. s. K Letišti 1068/30 160 08 Prague

airline Travel Service. euroinvestor.dk. [26 November 2009]. （原始内容存档于2016-03-04）.  Chinese-backed firm Travel Service to take over Czech Airlines. Reuters

（原始内容存档于2012-12-06）.  Bhutan Airlines wants to bow out for a while.. Bhutan Travel Designers. 2012-05-27 [2013-10-05]. （原始内容存档于2013-10-11）.  Bhutan Airlines - Fly with

  S7 Airlines Adds Seasonal Moscow – Salzburg Service from late-Dec 2015. Routesonline. [2019-12-28]. （原始内容存档于2019-12-29） （英国英语）.  S7 Airlines kehrt

Australia Group of Airlines. Virgin Australia. [7 June 2015]. （原始内容存档于2015-07-16）.  Dunkley, Andrew. Jetgo announces Dubbo - Brisbane service. ABC. 5 June 2015