Southwest has been mixing it up and posting their sales on Mondays recently. This latest incarnation of their Nationwide Sale is valid for travel in late summer and fall months, even though the website says September and October travel. These deals fall in line with Southwest's usually weekly offerings, but with over 1,100 routes marked down, there are deals to be had all over the U.S.

Like last weeks sale, seats are available on Monday through Thursday and Saturdays from August 21 through December 19, 2018. Travel to Nevada and Florida on Sunday through Wednesday; Travel from Nevada and Florida Tuesday through Friday. Flights are blacked out on August 31, September 3, November 20-21 & November 24-26, 2018. As always, pack all you want because Southwest still flys two checked bags for free.

All tickets must be booked by Friday, July 20, 2018, at 11:59 pm.

Please note, these fares are only available on Southwest.com. Other carriers regularly match these sale fares, so be sure to compare to find the best deal.

Sample nonstop sale fares include:

Long Beach to Las Vegas $94 roundtrip

Oakland to San Diego $124 roundtrip

Ontario to San Jose, CA $124 roundtrip

Atlanta to Nashville $130 roundtrip

Cincinnati to Baltimore $134 roundtrip

Portland to Los Angeles $138 roundtrip

Tulsa to Dallas-Love Field $148 roundtrip

Denver to Las Vegas $158 roundtrip

Chicago-Midway to Indianapolis $162 roundtrip

St. Louis to Des Moines $164 roundtrip

Los Angeles to Phoenix $166 roundtrip

Nashville to Boston $170 roundtrip

Washington DC-National to Ft. Lauderdale $174 roundtrip

Newark to Chicago-Midway $176 roundtrip

Raleigh to Orlando $182 roundtrip

Atlanta to Houston-Hobby $182 roundtrip

Hartford to Tampa $192 roundtrip

Baltimore to Minneapolis $198 roundtrip

Chicago-Midway to Pittsburgh $200 roundtrip

Phoenix to Boise $206 roundtrip