Many frequent flyers stand by the fact that if you keep yourself hydrated and get plenty of rest the effects of jet lag should go within a few days. However, there are some other ways to stop Jet Lags effects and there are remedies to stop you getting it all together.
El Calafate to Ushuaia jet lag information
Lets assume you left El Calafate at 9:00am. The flight takes approximately 1 hours 27 minutes so you would arrive in Ushuaia at 9:12am El Calafate time which is in fact 9:12am Ushuaia time.
Your body will be telling you that its 9:12am but actually its now 9:12am