While Singapore Airlines is famous for its luxurious suites and first-class cabins, I could only afford an economy ticket. But my experience was still far better than my recent trips on US airlines.

I flew business class with Qantas Airlines, American Airlines, and Singapore Airlines. Here's the best one and how the seats, food, service compare.

Airlines make the majority of their revenues from travelers, though they can also profit from affiliations with travel partners and credit card companies. Business travelers make up 12% of airline ...