'group trip' is a correct and usable phrase in written English.
You can use it when referencing an outing taken by multiple people. For example, "The class organized a group trip to the zoo last week."
Trekking lends itself well to a group trip.
Together they recently led a group trip to Israel on behalf of the JCC.
The entire flock partakes, and the group trip is a kind of congregational service.
The group trip costs from £1,040 adults and £970 children, including flights, departing 24 December.
This group trip combines the vast Namib desert with Botswana's Okavango Delta.
Intrepid Travel (0808 274 5111; intrepidtravel.com) has a new 12-day Wild Alaska group trip this year.
Many attendants do their own hair and makeup; others may opt for a group trip to the salon.
Ride Worldwide has an eight-day group trip that crosses plateaux, canters along valley floors and explores remote villages.
So I signed up for a group trip with Wilderness Journeys, and arrived in Chamonix last March feeling distinctly blasé.
Of course, you don't have to join a group trip to experience life on the (slow) rails.
Eight years ago, the Candy Bar, a lesbian bar in London, organised a group trip to the island.
