work in (someone's) favor

Translations
работать в (чью-то) пользу
The unexpected weather changes worked in our favor during the event.
Неожиданные изменения погоды сработали в нашу пользу во время мероприятия.
Definitions
To result in a way that is beneficial or advantageous to someone; to have an outcome that helps or supports someone's interests or goals.