the UA airpass: 3-8 coupons, 1 coupon = one flight number which can include stopovers as long as it is the same flight number, includes continental us, plus Canada, plus Mexico, plus Puerto Rico, plus Alaska, plus Hawaii (surcharge for Hawaii segments) officially needs a transatlantic ticket on a StarAlliance carrier (ticket number of transatlantic ticket is imprinted on your air-pass), first segment not later than 30 days after transatlantic journey, last segment not later that 60 days after first air-pass-segment. First segment must be fixed when buying, later segments can be open and/or changed (fee for different routing, no fee for time/day-change). You earn miles, you can upgrade.