Hello Road ... Jet Blue definitely provides the best leg room of any domestic airline without the need to upgrade. With that said, I'm not sure how big of a man you are but I am 5'10" and roughly 215 pounds and have never, ever needed to upgrade for more leg room. I believe Jet Blue has maintained 36 inches of legroom on their flights, whereas American, United, and even Delta have reduced their numbers to as little as 32 or 33 inches. Doesn't sound like much, but it is. I would suggest giving it a try without paying for the upgrade, but this is your call.
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