Spirit Airlines has a promo code valid for puchase through July 4th. Save up to 40% off the base fare for travel this summer and fall. Fares start at just $66 roundtrip.

Just enter promo code 40PCT when booking on Spirit.com to apply a 40% discount to the base fare for travel on Tuesdays and Wednesdays, from July 11 through August 29; and Mondays, Tuesdays, Wednesdays, Thursdays, and Saturdays, from September 4 through November 14. Avoid blackout dates on October 4, 6, and 8.

Although we've seen better prices in past promo code sales, this promo code does discount summer travel, which usually is not included in the better promo code sales. Lowest available fares are generally not available during peak summer months, but flights will still be discounted.

The discount will only apply to the base fare and not to taxes nor Spirit's booking fees so don't expect to see that large of a price drop on most routes. There is also a large list of excluded markets in this sale.

If you are unfamiliar with Spirit, please read our guide on How to Fly Spirit Airlines.

Promo code expires at 11:59pm ET, on July 4, 2018.

A sample of fares include:

Boston to Atlanta $66 roundtrip, nonstop

Oakland to Las Vegas $67 roundtrip, nonstop

Los Angeles to Las Vegas $69 roundtrip, nonstop

Columbus to Myrtle Beach $70 roundtrip, nonstop

Atlanta to Tampa $73 roundtrip, nonstop

Asheville to Orlando $114 roundtrip, nonstop

Greensboro to Fort Lauderdale $114 roundtrip, nonstop

Dallas to San Diego $123 roundtrip, nonstop

Minneapolis to Seattle $123 roundtrip, nonstop

Baltimore to Tampa $126 roundtrip, nonstop

Los Angeles to Minneapolis $126 roundtrip, nonstop

Newark to Los Angeles $127 roundtrip

Pittsburgh to Las Vegas $133 roundtrip, nonstop

Los Angeles to New York $135 roundtrip

Columbus to Las Vegas $139 roundtrip, nonstop

Houston to Los Angeles $139 roundtrip, nonstop

Chicago to San Diego $145 roundtrip, nonstop

Boston to Los Angeles $173 roundtrip

Phoenix to Atlanta $199 roundtrip

Denver to St. Thomas $230 roundtrip

Orlando to Panama $261 roundtrip, nonstop

Detroit to Bogota $321 roundtrip

There are many more routes available as well. Domestic routes will work in reverse. Lowest fares may not be available for the entire travel period. You'll have to decline any extras to get the lowest price.

Spirit's Bare Fares only include one small personal item (small backpack, large purse, briefcase, etc.) that will fit underneath your seat. Checked baggage starts at $30 each way. Larger carry-on bag fees start at $35 each way.

Above image via Spirit.

All products and services mentioned on Airfarewatchdog are independently selected by our team of expert travelers. If you buy something through our links, we may earn an affiliate commission.

More Stories You'll Love