Business Loop I-40 - Flagstaff

Business Loop I-40 west at SR 89A - Flagstaff, AZ
Business Loop I-40/Historic U.S. 66 turn west off of Milton Road toward west Flagstaff as SR 89A begins south toward the exchange joining I-17/40. 04/27/17

The second longest of the business routes in Arizona at 9.51 miles, the Flagstaff loop runs east from Exit 191 along Historic U.S. 66 and old U.S. 89 to SR 89A (Milton Road). Milton Road leads the loop north to Old Santa Fe Avenue east and Downtown.

U.S. 180 combines with Business Loop I-40 east from Humphreys Street to Country Club Drive and the south end of U.S. 89. Business Loop I-40/U.S. 180 (Country Club Drive) spans Historic U.S. 66, a BNSF Railroad and Industrial Drive south to Interstate 40 at Exit 201.

Business Loop I-40 Photo Guide
Updated August 1, 2026