Fly cheap with United from Houston to Chicago (or vice versa)! Book the tickets from only $78 for a round trip with United Airlines!
USFly cheap with American Airlines from Houston to Chicago (or vice versa)! Book the tickets from only $70 for a round trip!
American Airlines are offering cheap non stop flights from Chicago to Houston and San Francisco (and vice versa) starting at only $82 round trip!
USFly cheap from Houston to Atlanta (or vice versa) for from only $76 roundtrip with United!