Domestic airfares for autumn travel are 25% lower than this spring, according to a study.

 According to Travel App Hopper's most recent quarterly study, domestic airfares booked now for fall travel are 25% less than they were in the spring.

According to the app's Late Summer (Q3) Travel Index, the average domestic airfare could drop as low as $286 roundtrip for August bookings.

This is a 25% decrease from May, when average fares exceeded $400, and a 3% decrease from August of last year.

As travel demand slows in the autumn, airfares typically fall by 10% to 15%.

However, this year's drop is steeper than usual due to unusually high spring and summer fares.

If booked by the end of September, the average airfare for the rest of the year will remain at or below $300.

As per Hopper, travellers departing from the most important U.S. air hubs should find good deals this month.