435 Routes
- Ulmer South Carolina -> Colton New York
- Ulster Pennsylvania -> Chattanooga Oklahoma
- Ulster Pennsylvania -> Culbertson Montana
- Ulster Pennsylvania -> Littleville Alabama
- Ulvah Kentucky -> Horse Creek Junction Kentucky
- Ulvah Kentucky -> Keomah Village Iowa
- Ulysses Nebraska -> Almeria Nebraska
- Ulysses Pennsylvania -> Bolinas California
- Umatac Guam -> Sinajana Guam
- Umatilla Florida -> Grancer
- Umatilla Florida -> New Square New York
- Umatilla Oregon -> Hamlet Oregon
- Umatilla Oregon -> Richmond Hill Georgia
- Umbarger Texas -> Chili Wisconsin
- Umbarger Texas -> South Burlington Vermont
- Umber View Heights Missouri -> Richland Missouri
- Umpqua Oregon -> Alba Missouri
- Umpqua Oregon -> Butte Falls Oregon
- Umpqua Oregon -> Elsa Texas
- Umpqua Oregon -> Erskine Minnesota
- Umpqua Oregon -> Saunemin Illinois
- Unadilla Forks New York -> Center Lake South Dakota
- Unadilla Forks New York -> Lorida Florida
- Unadilla Georgia -> Blue Ridge Alabama
- Unadilla Georgia -> Faceville Georgia
- Unadilla Georgia -> Gloucester Courthouse Virginia
- Unadilla Nebraska -> Willard Kansas
- Unadilla New York -> Forest Hill Texas
- Unaka North Carolina -> Bonesteel South Dakota
- Unaka North Carolina -> Cainsville Missouri
- Unaka North Carolina -> Woodland Mississippi
- Uncertain Texas -> Dermott Texas
- Uncertain Texas -> Leeds South Carolina
- Uncertain Texas -> Mont Belvieu Texas
- Uncertain Texas -> Portage Indiana
- Underhill Center Vermont -> Gassetts Vermont
- Underhill State Park Vermont -> Essex Illinois
- Underhill Wisconsin -> Chaffey Wisconsin
- Underhill Wisconsin -> Dayton Wyoming
- Underhill Wisconsin -> Durbin North Dakota
- Underhill Wisconsin -> Morenci Michigan
- Underhill Wisconsin -> Smoke Rise Alabama
- Underwood -> Saude Iowa
- Underwood Dakota Del Norte 58576 -> Hettinger Dakota Del Norte 58639
- Underwood Iowa -> Crosby Pennsylvania
- Underwood Minnesota -> Artas South Dakota
- Underwood Minnesota -> Haigler Nebraska
- Underwood Minnesota -> Jensen Place Florida
- Underwood New York -> Newport Tennesse
- Underwood North Dakota -> Hewlett New York
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