Get round-trip flights on Southwest Airlines with rates from $98 on Airfarewatchdog. We found the lowest fares on flights from Boston to Baltimore and on flights from Atlanta to New Orleans. Flights between Newark and Chicago start at $158. You can enter your own travel dates and locations to find fare prices on Airfarewatchdog. Some flights require advance bookings or travel on specific days of the week. There's also a sale going on at Southwest Vacations, where you can save up to $75 on select beach vacation packages. Taxes, fees, and restrictions may apply.