I flew business class with Qantas, Singapore, and American Airlines. Here's how they compare — and which is my favorite.

Source: Business Insider

I've flown business class a few times, and I've learned not all upgraded flights are created equally. Jill SchildhouseI've flown business class with Qantas Airlines, American Airlines, and Singapore Airlines. My Singapore Airlines flight had the most mind-blowing food and the comfiest seat.