You don't need to. You address it to the corporate HQ and let the mail room deal with the proper routing within the organization.

For example, Southwest.

https://www.southwest.com/html/contact-us/index.html?clk=GFO...

    Write us
    Have extra stamps? Send us a letter.
    P.O. Box 36647-1CR
    Dallas, Texas 75235

And so:

    Manager - XYZ airport customer support
    c/o Southwest Airlines
    P.O. Box ...

This is a real benefit of public corporations: anyone with significant ownership is public. The names of the owners and executives are trivial to find.