It may not feel like it in certain parts of the country, but today marks the first day of Spring. Since Spring is in the air, Southwest Airlines is hoping you will be too. With fares starting at $98 round-trip this sale is valid for nonstop flights during the Spring and Fall travel windows.

Fly from early April through June 13, 2018, or from August 21 through October 31, 2018. Unfortunately, No July travel dates at these prices. Seats are available on Tuesdays, Wednesdays, and Saturdays. Travel to Florida and Nevada is available on Sundays through Wednesdays. Travel from Nevada to Florida is valid only on Tuesdays through Fridays. Travel is blacked out May 24-25, May 28, August 31 and September 3, 2018, for the Memorial and Labor Day weekends.

Tickets must be booked by midnight on March 29, 2018.

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.

Nonstop Fares include:

Milwaukee to Cleveland $98 round-trip 

Portland, OR to San Francisco $108 round-trip

Cincinnati to Baltimore $112 round-trip

San Jose to Las Vegas $118 round-trip

Los Angeles to Oakland $118 round-trip

San Francisco to Santa Ana $118 round-trip

Ontario, CA to San Jose $118 round-trip

Seattle to Sacramento $138 round-trip

Grand Rapids to Chicago-Midway $144 round-trip

Washington DC-National to Columbus $148 round-trip

Austin to New Orleans $156 round-trip

Minneapolis to Baltimore $186 round-trip

New York-LGA to Tampa $192 round-trip

San Juan to Ft. Lauderdale $196 round-trip

Dallas-Love Field to Los Angeles $206 round-trip

Chicago-Midway to Houston-Hobby $208 round-trip

Phoenix to Seattle $218 round-trip

St. Louis to Las Vegas $230 round-trip

Newark to Austin $238 round-trip

Kansas City to New York-LGA $246 round-trip