Booked a RT to Europe pre-deval for 100K. Called yesterday to change route, including destination. The system automatically repriced, the agent told me it would be an additional 40K. I made my case being that I had booked pre deval I should be entitled to a change without requiring additional mileage. I didnt have high hopes as I had already hucad about 5 times. Additionally this agent didnt seem to be the brightest. When I asked for a supervisor to override the reprice, she responded " I am a supervisor".
So I pleaded and begged, lo and behold she says I will allow it. She proceeded to make the change without charging any additional miles, or collecting the $100 change fee or the $51.60 in additional taxes.
My e-ticket receipt shows 140000 miles redeemed.