If you're planning a road trip to Iceland between June and August, we recommend booking as early as possible.
The destination is very much in demand during this short period, which is often the most optimal for an unforgettable trip in the best possible conditions.
In fact, half the tourists who travel during this season have booked more than six months in advance.
It's true that it's always possible to make last-minute bookings, but you should be aware that the choice of accommodation will be less attractive and plane tickets more expensive than if you book early.
Outside this season, it's not as important to book so early. There is more availability, except during special events. But you should be aware that, due to Iceland's harsh climate, some hotels are closed for very long periods of the year, limiting your accommodation options.
However, you'll always save more by booking as early as possible, especially on air travel and car rental.