A CL600 CAPT DESCRIBED A DEV FROM THE SWEED STAR AT CVG DUE TO A PREOCCUPATION WITH A TIGHT COMMUTE CONNECTION AFTER THE FLT.

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ON LAST DAY OF A 4-DAY TRIP; 7TH LEG OF THE DAY; WE DEVIATED FROM THE SWEED STAR TO CVG WITHOUT APPROVAL OR CLRNC. PREPARING TO TURN AROUND QUICKLY AT CAE; THE FO SET UP THE FMS -- A TASK I NORMALLY DO. HE WAS ANXIOUS TO GET BACK TO CVG ON TIME; AS HE HAD A TIGHT COMMUTE CONNECTION AT THE END OF THE TRIP. IN ANY EVENT; THERE WAS A BREAKDOWN OF THE PROC OF XCHKING AND VERIFYING THE PROPER RTE IN THE FMS; AND THEN FAILING TO RECOGNIZE ENRTE THAT IT WAS NOT CORRECT -- IN SPITE OF HAVING FLOWN AT NUMEROUS TIMES. WE WERE PROCEEDING FROM HMV VOR DIRECTLY TO 'SWEED' INTXN WHEN CTR ASKED IF WE WERE PROCEEDING DIRECT TO CHEDA FIX AND IF NOT; WHY? WE ADMITTED OUR MISTAKE AND GOT THE ACFT HEADED TOWARD CHEDA. ALTHOUGH I TRY TO PSYCH MYSELF UP TO BE DOUBLY ALERT FOR ERRORS AT THE END OF A LONG DAY; IT SEEMS THAT THIS IS EXACTLY WHERE I FIND MYSELF MAKING THEM. THIS ONE WAS A COMBINATION OF BEING IN A HURRY; FAILING TO XCHK EACH OTHER; HAVING ONE'S MIND ON SOMETHING COMING UP AFTER THE TRIP; AND GENERAL LACK OF MENTAL ALERTNESS BY BOTH CREW MEMBERS.