Aer Lingus. The airline is the flag carrier of Ireland. C...

The National
  • Aer Lingus. The airline is the flag carrier of Ireland. Cathal McNaughton / Reuters
    Aer Lingus. The airline is the flag carrier of Ireland. Cathal McNaughton / Reuters
  • Jetstar Australia. David Gray / Reuters
    Jetstar Australia. David Gray / Reuters
  • A WestJet Airlines Boeing 737-700 taxis past low-lying fog at Vancouver International Airport. The airline is based in Canada. Darryl Dyck / AP
    A WestJet Airlines Boeing 737-700 taxis past low-lying fog at Vancouver International Airport. The airline is based in Canada. Darryl Dyck / AP
  • A Vueling aircraft takes off at Barcelona airport. The airline is based in Barcelona. Josep lago / AFP
    A Vueling aircraft takes off at Barcelona airport. The airline is based in Barcelona. Josep lago / AFP
  • Virgin America. LM Otero / AP
    Virgin America. LM Otero / AP
  • Thomas Cook. It is a British company. Alexander Hassenstein / Getty Images
    Thomas Cook. It is a British company. Alexander Hassenstein / Getty Images
  • JetBlue. The airline is based in the US. James Darcy / Airbus
    JetBlue. The airline is based in the US. James Darcy / Airbus
  • Frontier. The airline is based in the US. Rick Wilking / Reuters
    Frontier. The airline is based in the US. Rick Wilking / Reuters
  • Flybe. The airline is based in the UK. HK Express of Hong Kong also made the top 10 list. Paul McErlane / EPA
    Flybe. The airline is based in the UK. HK Express of Hong Kong also made the top 10 list. Paul McErlane / EPA