Something is wrong with the economic system. I am using 4 747-400 on the LAX to O'hare airports and losing tons of money. I never had the problem in previous versions. I am also having the same problem with LAX to JFK.
https://imgur.com/YHzW8Xm
https://imgur.com/SeFgM6Y
https://imgur.com/YHzW8Xm
https://imgur.com/SeFgM6Y