It's the middle of summer, so it'd be a real jerk move to tell you that summer is going to end.
Summer is going to end. But you can alleviate the pain of knowing that by planning and a fall or winter getaway. There are good deals to be had on flights from a handful of US cities to Cancun or Puerto Vallarta in Mexico with dates ranging from September through January of 2018. The deals are found across a number of airlines, including JetBlue, American Airlines, and Aeromexico, as highlighted by Thrifty Traveler.
The prices start as low as $194 flying out of Fort Lauderdale. You can also fly out of Houston for $220, Los Angeles for $238, Jacksonville for $262, Boston for $273, Chicago for $279, Washington D.C. for $279, New York for $280, and Las Vegas for $288.