RJ have a higher CASM in general in comparison to mainline a/c due to amount of seats which costs can be spread across. The kicker is can the airline a achieve RASM that equal to/greater than the CASM for a particular flight. RASM =/> CASM means the flight will break even or make a profit.

There many more variables with running RJ vs mainline on particular routes. But it is IMHO that it would be cheaper for mainline to absorb all regional flying to achieve synergy from top down.


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