www.spirit.com Spirit had flights between Chicago to/from Boston, Dallas, Detroit, and New York LaGaurdia for $2 round-trip each way plus tax=$39. Valid dates are 08/23, 08/24, 08/30, 08/31, 09/13, 09/14. Just beware of their exhortation fees ranging from carry-on fees to hefty checked luggage fees and even a fee to get a boarding pass at [...]