Spirit Airlines via DealBase offers Spirit Airlines 1-Way Flights Nationwide with prices starting from $44.20. (On the DealBase landing page, click on "Spirit Airlines" in the top line to see this sale.) That's the lowest price we could find for select routes by at least $6. This price is valid on flights departing from Boston, MA, (BOS) with arrival in Baltimore, MD, (BWI) on November 29. Book this travel deal today for travel from November 14 through February 13, 2018.

All prices, dates, and booking details were valid at the time of publication.