1738 Routes
- Orting Washington -> Fruitvale Washington
- Orting Washington -> Skykomish Washington
- Ortley South Dakota -> Lorena Texas
- Ortley South Dakota -> Redfield South Dakota
- Ortonville Michigan -> Golf Manor Ohio
- Ortonville Michigan -> Imboden Arkansas
- Ortonville Michigan -> Lockport
- Ortonville Michigan -> Perry Heights Ohio
- Ortonville Minnesota -> Harcourt Iowa
- Ortonville Minnesota -> Stangelville Wisconsin
- Orvil Texas -> Centerville Georgia
- Orvil Texas -> North Folk Village Ohio
- Orville -> Baskerville Virginia
- Orville -> Plattsmouth Nebraska
- Orville -> Traer Iowa
- Orwell Ohio -> Harriman Tennesse
- Orwell Ohio -> Hatton Washington
- Orwell Ohio -> Shennington Wisconsin
- Orwell Vermont -> East Albany Vermont
- Orwigsburg Pennsylvania -> Felt Idaho
- Orwigsburg Pennsylvania -> Talcum Kentucky
- Osage Arkansas -> Brickeys Arkansas
- Osage Arkansas -> South Miami Florida
- Osage Beach Missouri -> Branson Missouri
- Osage City Kansas -> Gilchrist Oregon
- Osage City Kansas -> Hampton South Carolina
- Osage City Kansas -> Swoyersville Pennsylvania
- Osage City Missouri -> Volin South Dakota
- Osage Iowa -> Hortense Georgia
- Osage Oklahoma -> Clifton Springs New York
- Osage Oklahoma -> Gillis Louisiana
- Osage West Virginia -> Parsons West Virginia
- Osage Wyoming -> Burgess Junction Wyoming
- Osage Wyoming -> Fort Stewart Georgia
- Osage Wyoming -> Rozet Wyoming
- Osaka Alabama -> Mcmahan Tennesse
- Osakis Minnesota -> Golden Isles Georgia
- Osborn Illinois -> Beaver Louisiana
- Osborn Kentucky -> Bumpass Virginia
- Osborn Missouri -> Leicester North Carolina
- Osborne Iowa -> Danforth Illinois
- Osborne Iowa -> High Point North Carolina
- Osborne Kansas -> Jamestown Colorado
- Osborne Kansas -> Oneco Illinois
- Osborne Kansas -> Salem Indiana
- Osborne Kansas -> Shawnee Oklahoma
- Osborne Pennsylvania -> Kenney Illinois
- Osburn Idaho -> Colcord Oklahoma
- Osburn Idaho -> Tidioute Pennsylvania
- Oscaloosa Kentucky -> Penn Lake Park Pennsylvania
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