low season
US /ˈloʊ ˌsiː.zən/
UK /ˈloʊ ˌsiː.zən/

1.
bassa stagione, fuori stagione
the time of year when a particular tourist destination or activity is least popular and prices are lowest
:
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Traveling during the low season can save you a lot of money on flights and accommodation.
Viaggiare durante la bassa stagione può farti risparmiare molti soldi su voli e alloggi.
•
The hotel offers special discounts during the low season.
L'hotel offre sconti speciali durante la bassa stagione.