I have insisted on arranging my own flights / hotels after once being booked on a London to Chicago flight that went LHR-LAX-ORD....because the person that booked it noticed it was £50 cheaper with 1-stop. She had no idea of the distances involved in the US and thought that LAX to ORD was similar time to catching an LHR to MAN shuttle
She needs to come on here to learn about proper route planning.
That way she'd have booked you on OSL-HEL-LHR-JFK-LAX-PHL-ORD.and saved £75