Break-Even Load Factors

[WhiskeyNovember]

Hello,

What are some typical load factors required for an average airline to break even (ie: not make or lose any money) on the flight?

I'm sure there are hundreds of variables involved, not the least of which is aircraft type. I'd be interested in hearing what a break-even load factor would be for, say, a 737 and 757.

In addition, what commercial jet aircraft types are known for having the lowest break-even load factors?

Thanks in advance for any answers to some admittedly vague questions.


-WN