For sale: 20% off any United/Contintental itinereary. Includes international flights, and almost all fare classes (including business & first). Electronic voucher is transferrable and can be applied online. I can send full T&Cs for the voucher and when you have an itinerary ready to book you can confirm it works. Best value when applied to very expensive tickets. Flights must be completed by June 11. Asking price $330 ono.