— and now there are even more benefits

Costco's travel service is fast becoming one of its biggest assets.
The retail giant has been offering members deals on hotels, flights, cruises, and rental cars since 2000.

While it might not sound like the most glamorous way to book a trip, its customers can't get enough of it — including Business Insider's Kate Taylor, who booked a seven-day trip to Puerto Rico for just over $800, including flights, transportation, and a hotel stay.

On Wednesday, during Costco's most recent earnings call, CFO Richard Galanti explained that the quarter's improvements were partly due to its travel business, which has high margins because of the few administrative costs associated with it.

"It's not the value of that plane ticket and hotel — it's the broker commission," he said.

And it's designed to be a good value for the customer.