January: Oakland - Chicago (with return) from $209 with Spirit Airlines
December: Boston - Chicago (with return) from $219 with Spirit Airlines
November: Austin - Chicago (with return) from $163 with Spirit Airlines
November: Boston - Chicago (with return) from $200 with Spirit Airlines
September: Los Angeles - Chicago (with return) from $127 with Spirit Airlines
September: San Diego - Chicago (with return) from $203 with Spirit Airlines
September: Dallas - Chicago (with return) from $77 with Spirit Airlines