I spent over $700 for a business-class upgrade on JetBlue. The lie-flat seats weren’t even the best …

• I took a 6 ½-hour JetBlue flight from Boston to Los Angeles for work.

• I knew I needed to sleep on the flight, so I upgraded to Mint, JetBlue’s business-class cabin.

• For an additional $700, I got great food, amenities, and a seat that converted into a lie-flat bed.

Earlier this year, I took a 6 ½-hour JetBlue flight from Boston to Los Angeles for work.

I initially purchased a standard “Blue” fare, but knew I needed to get some sleep on the flight. When I saw seats available in the Mint cabin…