Southwest Airlines is celebrating Valentine’s Day and the month of love with another nationwide sale featuring flights from as low as $39 one-way. Discounted fares are available on continental U.S. and interisland Hawaii travel from March 3 through May 20, 2020; travel to/from San Juan, Puerto Rico between April 14 and May 14, 2020; and International travel from April 14 through May 14, 2020. Bookings require a 21-day advance purchase. As has been the case in the past, you’ll find the cheapest fares on interisland Hawaii routes such as Honolulu to Kona, which starts at just $39 one-way and $78 roundtrip for nonstop travel. Nonetheless, routes within the continental U.S. start at just $54 one-way or $108 roundtrip (Atlanta-Nashville). Fly nonstop between Austin, Texas and Fort Lauderdale for under $90 one-way or Houston (Hobby) and Denver for less than $200 roundtrip. There are also a handful of international fares to save on this month, including nonstop from Fort Lauderdale to Grand Cayman, Cayman Islands for under $325 roundtrip. You may use your Facebook account to add a comment, subject to Facebook’s Terms of Service and Privacy Policy. Your Facebook infor...