you should consult the medical provider who examined you. the one who knows that type of ear infection you have (i am guessing a "middle" ear infection) the severity and the type of antibiotics you are taking. not all middle ear infections will be problematic after a few days but since i do not know the details of your case you need to get patient-specific advice from someone who has examined you. or have someone examine your ears just prior to your journey.
i was diagnosed with a ear infection on saturday and i was given course of antibiotics but i am due to go skiing on fri. i am due to go skiing this friday as a school trip but i am worried that the altitudes could be a problem with my ear. as i have had ear infections before and had to travel home from abroad i know how painful they are when flying but we are driving over to italy so i know that will not be a problem but i am worried about when i am skiing and as i am having very bad headaches along with the ear infections i am getting nervous about going. should i go skiing or should i cancel the trip?