P
| Train Name | Railroad | Train Endpoints | Operated |
|---|---|---|---|
| Pacemaker | New York Central | New York City-Chicago, Illinois | |
| Pacific Express | Erie | Hoboken, New Jersey-Chicago, Illinois | ? |
| Pacific Express | Michigan Central | New York, New York-Chicago, Illinois | |
| Pacific International | Northern Pacific, Great Northern, and Union Pacific | Seattle, Washington-Vancouver, British Columbia | |
| Pacific Limited | Grand Trunk Western | Chicago, Illinois-Montreal, Quebec | |
| Pacific Surfliner | Amtrak | San Diego, California-Paso Robles, California | 2000- |
| Palmetto | Amtrak | New York, New York-Savannah, Georgia | 1976-present |
| Pan American | Louisville & Nashville | Cincinnati, Ohio-New Orleans, Louisiana | |
| Panama Limited | Illinois Central | Chicago, Illinois-New Orleans, Louisiana | 1908-1971 |
| Paul Revere | New York Central | Buffalo, New York-Boston, Massachusetts | |
| Peach Queen | Southern Railway and Pennsylvania Railroad | New York, New York-Atlanta, Georgia | |
| Pelican | Southern Railway, Norfolk and Western Railway |
Washington, D.C.-New Orleans, Louisiana | |
| Peconic Bay Express | Long Island Rail Road | Long Island City-Greenport, New York | 1926-1950 |
| Peninsula 400 | Chicago and North Western Railway | Chicago, Illinois-Ishpeming, Michigan | 1942- |
| Peninsular | Pere Marquette | Detroit, Michigan-Grand Rapids, Michigan | |
| Penn Texas | Pennsylvania | New York, New York-St Louis, Missouri | |
| Pennsy Aerotrain | Pennsylvania | 1956-1956 | |
| Pennsylvania Limited | Pennsylvania | New York, New York-Chicago | |
| Pennsylvanian | Amtrak | New York, New York-Pittsburgh, Pennsylvania | 1980- |
| Peoria Rocket | Rock Island | Chicago, Illinois-Peoria, Illinois | 1937- |
| Pere Marquette | Amtrak | Chicago, Illinois-Grand Rapids, Michigan | |
| Pere Marquette | Pere Marquette | Detroit, Michigan-Grand Rapids, Michigan | 1946-1947 |
| Pershing Square | New York, New Haven and Hartford Railroad | Boston-New York City | |
| Piedmont | Amtrak | Raleigh, North Carolina-Charlotte, North Carolina | 1995- |
| Piedmont Limited | Southern | New York—New Orleans | 1899-1976 |
| Phoebe Snow | Lackawanna, Erie Lackawanna | Hoboken, New Jersey-Buffalo, New York as DL&W Hoboken, New Jersey-Chicago, Illinois as EL |
1949-1961, reinstated 1963-1966 |
| Pilgrim | New York, New York-Boston, Massachusetts | ||
| Pine Tree Acadian | Boston & Maine, Maine Central, Canadian Pacific, Canadian National | Boston, Massachusetts-Halifax, Nova Scotia | 1929 |
| Pinellas | Atlantic Coast Line | St. Petersburg, Florida-Jacksonville, Florida | |
| Pioneer | Gulf Coast Lines, later
Missouri Pacific |
Houston, Texas-Brownsville, Texas | |
| Pioneer | Amtrak | Salt Lake City,UT-Portland,OR | |
| Pioneer Limited | Milwaukee Road | Chicago, Illinois-Minneapolis, Minnesota | 1898-1970; |
| Pioneer Zephyr | Chicago, Burlington & Quincy | Kansas City, Missouri-Omaha, Nebraska-Lincoln, Nebraska Galesburg, Illinois-Springfield, Missouri |
1934-1960 |
| Pittsburgher | Pennsylvania Railroad | Pittsburgh-New York City | 1924-1964 |
| Pocahontas | Norfolk and Western Railway | Norfolk, Virginia-Cincinnati, Ohio | –May 1971 |
| Pocono Express | Lackawanna/Erie–Lackawanna | Buffalo-Hoboken (for New York) | -1965 |
| Ponce de Leon | New York Central | Detroit, Michigan-Cincinnati, Ohio | |
| Ponce de Leon | Southern | Cincinnati-Jacksonville | 1924–1960s |
| Pony Express | New Jersey Transit | Hoboken, New Jersey-Monmouth Park Racetrack | 1980-2006 |
| Portland Rose | Union Pacific | Chicago-Portland, Oregon Denver-Portland, Oregon Kansas City-Portland, Oregon |
1930–1971 |
| Potatoland Special | Bangor & Aroostook | Bangor-Van Buren, Maine | -1959 |
| Powhatan Arrow | Norfolk and Western Railway | Norfolk, Virginia-Cincinnati, Ohio | 1946–1969 |
| Prairie Marksman | Amtrak | Chicago, Illinois-East Peoria, Illinois | 1980-1981 |
| Prairie State | New York Central | Chicago, Illinois-Toledo, Ohio | |
| Prospector | Rio Grande | Denver, Colorado-Salt Lake City, Utah/Ogden, Utah | 1941-1942; 1945-1967 |
| Puget Sound | Amtrak | Seattle, Washington-Portland, Oregon | 1971-???? |
Read more about this topic: List Of Named Passenger Trains Of The United States (N-R)