Spirit Airlines offers select 1-way fares with prices starting at $38.89. (Click on "Spirit Airlines" under "Booking Tips" to see these rates.) That's the lowest current rate we could find for select routes by $5. This price is valid on flights from Minneapolis, MN, (MSP) to Chicago, IL, (ORD) departing on April 16; prices vary depending on departure cities and dates chosen. A $9 Fare Club membership is not required for this fare. Blackout dates may apply. Book by March 6 for travel April 3 through May 22.