JetBlue

JetBlue is one of my favorite domestic airlines. Although most of its aircraft contain a coach-class-only configuration, it boasts more legroom (its Airbus 320 features a 34-inch seat pitch) than other American carriers. For those who want even more room to stretch their legs, it offers “Even More Space” seats. With friendly flight attendants, customer service is also a plus, especially when compared to the surly flight attendants on US Airways. The airline also provides passengers with generous amounts of snacks.

Delta

While I’ve generally found Delta to have pleasant flight attendants, the lack of space between rows makes for a claustrophobic journey.

US Airways

Although recently acquired by American Airlines, as of this writing, US Airways is still operating its own flights. The lack of legroom and customer service is made worse by the fact that the flight attendants perform a live, too-long “commercial” hocking the airline’s credit card, followed by a pass down the aisle waiving the card applications in the air. If your hope is for a pleasant flying experience, I would avoid choosing this airline.

Southwest

My favorite thing about Southwest is its effort to provide a positive customer experience. Flight attendants dress casually and seem to genuinely enjoy their jobs, as do the customer service agents. In contrast to most U.S. carriers, they allow two free checked bags. Tip: Southwest doesn’t have assigned seating and boards the plane by boarding group (A, B, and C, respectively), which is largely determined by what time you check in. To avoid being in the dreaded C boarding group (where you may get stuck with a middle seat), check in as soon as possible, 24-hours before the flight. If you really want to ensure that you check in early, you can pay $12 per flight segment for “Early Bird Check-In.”