From the Portland Airport to The Nines:
- Board the Red Line at the airport
- Disembark at the "Mall/SW 5th Ave" stop (Stop ID #8382)
From The Nines to the MAC:
- Board the Red or Blue Line at the "Mall/SW 5th Ave" stop (Stop ID #8382)
- Disembark at the "King's Hill/SW Salmon Street" stop (Stop ID #9820)
From the MAC to The Nines:
- Board the Red or Blue Line at the "King's Hill/SW Salmon Street" stop (Stop ID #9759)
- Disembark at the "Pioneer Square South" stop (Stop ID #8334)
From The Nines to the Portland Airport:
- Board the Red Line at the "Pioneer Square South" stop (Stop ID #8334)
- Disembark at the airport
Click here to look up specific times: http://trimet.org/max/index.htm#lines