312 Routes
- Yatesville New York -> Swan Lake Montana
- Yatesville New York -> Tice Florida
- Yatesville Pennsylvania -> Adams Run South Carolina
- Yatesville Pennsylvania -> Poy Sippi Wisconsin
- Yauhannah South Carolina -> Milford Center Ohio
- Yaupon Beach North Carolina -> Harvey Point North Carolina
- Yaupon Beach North Carolina -> Spivey Kansas
- Yava Arizona -> Taft Oklahoma
- Yazoo City -> Lake Village
- Yazoo City Mississippi -> Independence Mississippi
- Yeager Kentucky -> Wauconda Washington
- Yeager Kentucky -> Wilroy Virginia
- Yeager Oklahoma -> Udell Iowa
- Yeagertown Pennsylvania -> Bingham South Carolina
- Yeaman -> Highlandville Iowa
- Yellow Bluff Alabama -> Long Point Minnesota
- Yellow Jacket Colorado -> Clayton Illinois
- Yellow Mountain Kentucky -> Stanton North Dakota
- Yellow Pine Idaho -> Dayton Maryland
- Yellow Pine Idaho -> Kings Creek North Carolina
- Yellow Pine Idaho -> Koeltztown Missouri
- Yellow Pine Idaho -> Surry Maine
- Yellow Rock Kentucky -> Aragon Georgia
- Yellow Rock Kentucky -> Arnold Pennsylvania
- Yellow Rock Kentucky -> Garret Grove Arkansas
- Yellow Rock Kentucky -> Roxbury New Hampshire
- Yellow Springs Ohio -> East Fletcher Vermont
- Yellville Arkansas -> Dog Walk
- Yelm Washington -> Hollywood New Mexico
- Yelm Washington -> Salem Utah
- Yelm Washington -> Willowtown
- Yemassee South Carolina -> Schriever Louisiana
- Yemassee South Carolina -> Zuni Pueblo New Mexico
- Yent Place Florida -> Colmar Illinois
- Yent Place Florida -> Congress Arizona
- Yent Place Florida -> Emerson New Jersey
- Yeoman Indiana -> Fern Ridge Reservoir Oregon
- Yeoman Indiana -> Montgomery West Virginia
- Yeopim Station North Carolina -> Lava Hot Springs Idaho
- Yeopim Station North Carolina -> West Brookfield Massachusetts
- Yeso New Mexico -> Elk Washington
- Yesse -> Grenville South Dakota
- Yesse -> Williamsport Pennsylvania
- Yetter Iowa -> Willapa Washington
- Yigo Guam -> Finegayan Station Guam
- Yigo Guam -> Ordot Guam
- Yigo Guam -> Sinajana Guam
- Yoakum Texas -> Ellisville Illinois
- Yoakum Texas -> Patrick Kentucky
- Yocemento Kansas -> Spencer Brook Minnesota
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