How Long Does The Flu Last 2024 In Us. Flu season in the united states typically stretches from october to february, though activity can last as late as may, according to the cdc. Symptoms usually appear from one to four days.

Current seasonal flu activity in the united states, information for health providers, in season estimates, and flusight forecasting. After you’ve been exposed to the flu, the time it takes you to get infected (incubation period) is usually one to four days (an average of two days).