1738 Routes
- Oscar Oklahoma -> Heber City Utah
- Oscarville Georgia -> Dassel Minnesota
- Oscarville Georgia -> Eight Mile Pond Florida
- Osceola Astros Com Florida -> Coleville California
- Osceola Illinois -> Eldorado Springs Colorado
- Osceola Illinois -> Pettigrew Arkansas
- Osceola Indiana -> Anoka Indiana
- Osceola Iowa -> Brady Maryland
- Osceola Iowa -> Colorado City Arizona
- Osceola Mills Pennsylvania -> Bridgman Michigan
- Osceola Mills Pennsylvania -> Hodges South Carolina
- Osceola Nebraska -> Squirrel Idaho
- Osceola Wisconsin -> Duncan Arizona
- Osco Illinois -> Battle Creek Iowa
- Osco Illinois -> Gantt Alabama
- Oscuro New Mexico -> Garden Corners Michigan
- Oscuro New Mexico -> La Moure North Dakota
- Oscuro New Mexico -> Sunset New Mexico
- Osgood Idaho -> Wattis Utah
- Osgood Indiana -> Angwin California
- Osgood Indiana -> Croton Michigan
- Osgood Indiana -> Echeta Wyoming
- Oshawa Minnesota -> East Meredith New York
- Oshawa Minnesota -> Jupiter Florida
- Oshawa Minnesota -> Ortley South Dakota
- Oshawa Minnesota -> Vining Minnesota
- Oshawa Minnesota -> Wilder Vermont
- Oshkosh Nebraska -> Bennington Nebraska
- Oshkosh Nebraska -> Boiling Springs Pennsylvania
- Oshkosh Nebraska -> Ice Kentucky
- Oshkosh Nebraska -> Tracy Minnesota
- Oshkosh Wisconsin -> Oak Grove Arkansas
- Oshkosh Wisconsin -> Van Dyne Wisconsin
- Oshoto Wyoming -> Byron Wyoming
- Oshoto Wyoming -> South Prairie Washington
- Oshoto Wyoming -> Worland Wyoming
- Oshtemo Michigan -> Sangaree South Carolina
- Oshtemo Michigan -> Snyder Lake Michigan
- Osierfield Georgia -> Mason West Virginia
- Osierfield Georgia -> Rimmy Jims Arizona
- Osierfield Georgia -> Rudy Arkansas
- Osierfield Georgia -> Union Village Vermont
- Osierfield Georgia -> Warsaw Illinois
- Oskaloosa Illinois -> Leigh Nebraska
- Oskaloosa Illinois -> Steilacoom Washington
- Oskaloosa Iowa -> Lodiburg
- Oskaloosa Iowa -> Roanoke Indiana
- Oskaloosa Kansas -> Floydale South Carolina
- Oskaloosa Kansas -> Lewis Florida
- Oskaloosa Missouri -> Lake Diversion Texas
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