Aberdeen Central MSP Kevin Stewart has written to SPFL boss Neil Doncaster to express his “dismay” over the fixture.
He has asked the body’s chief executive to “rethink” the scheduling and to “put fans first”.
In his letter, the Aberdeen Central MSP states: “I am very angry to hear that the Dons’ semi-final will be kicking-off at a time before the first train from Aberdeen will arrive in Glasgow.
“If there is a genuine desire to grow the game in this country, then we shouldn’t be making it difficult for supporters to attend matches.
“It’s a disgrace that Aberdeen fans are, once again, being treated with contempt.”
He added: “If you choose to persevere with your perverse timetabling then at the very least you must provide assurances that the SPFL will be engaging with public transport providers to help ensure Aberdeen is able to fill its half of Hampden on the day.”