our trip lasted (for) 3 days

https://books.google.com/ngrams/graph?content=trip+lasted+*&year_start=1800&year_end=2022&corpus=en&smoothing=3

The correct translation depends on what this means because TRIP can be interpreted in two ways: (1) the journey to or from a place, in reference to which you’d say THE TRIP TOOK THREE DAYS or WE WERE ON THE ROAD or TRAIN or BUS/IN THE CAR FOR THREE DAYS; (2) the time spend in a destination: WE VACATIONED/STAYED/WENT THERE FOR THREE DAYS or OUR TRIP/VACATION WAS THREE DAYS LONG.

Which of these does the Russian express?

Most likely, 1

However it can be путешествие=vacation (coach trip from one hotel to another, cruise,...)

ULY, "the time spend" или "the time spent"?

*spent