1Q 2019 CASK was EURc6.46
https://investors.finnair.com/~/medi...-report-en.pdf
CPH-HEL is 891km
HEL-HKG is 7,821km
--> so that gives EUR1,126 as the cost of producing an average seat CPH-HKG return
Missing pieces:
- Cost of J product vs. average CASK
- Stage length adjustment