Kowa ya san abin da ke haifar da mummunan jirgin sama. Jinkirta (ko soke) jirage, rashin sabis na abokin ciniki, jirage marasa dadi… abubuwan da aka saba. Don ƙwarewar tafiye-tafiye na ƙarshe, tafiye-tafiyen iska na iya zama mai canza wasa wajen tantance ingancin tafiyarku gaba ɗaya. Bangarorin kamar ta'aziyya, abubuwan more rayuwa, aminci, da kiyaye lokaci suna taka muhimmiyar rawa yayin zabar ingantaccen jirgin sama don tafiya mai zuwa. Abubuwan da za a yi la'akari da su don mafi kyawun kamfanonin jiragen sama, sun haɗa da:
- Rikodin aminci.
- Ayyukan kan lokaci.
- Ta'aziyya da abubuwan more rayuwa (kamar ta'aziyyar wurin zama, nishaɗin jirgin sama, da abinci).
- Sabis (ciki har da sabis na abokin ciniki da halin ma'aikata).
- Shirye-shiryen wasiƙa akai-akai da ladan aminci.
- Hanyoyin sadarwa da sadaukarwar hanya.
- Farashin farashi.
- Ayyukan muhalli da dorewa.
- Fasahar jirgin sama da haɗin kai.
- Kyaututtuka da karramawa a masana'antar.
Anan akwai manyan kamfanonin jiragen sama 20 mafi kyau a duniya.
- Singapore Airlines
- Qatar Airways
- ANA All Nippon Airways
- Emirates
- Japan Airlines
- Turkish Airlines
- Air France
- Kuwait Pacific
- Eva Air
- Korean Air
- Hainan Airlines
- Swiss Int'l Air Lines
- Etihad Airways
- Iberia
- Fiji Airways
- Vistara
- Kamfanin Qantas
- British Airways
- Air New Zealand
- Delta Air Lines