| Train Name |
Railroad |
Train Endpoints |
Operated |
| Pacemaker |
New York Central |
New York City-Chicago, IL |
|
| Pacific Express |
Erie |
Hoboken, NJ-Chicago, IL |
? |
| Pacific Express |
Michigan Central |
New York, NY-Chicago, IL |
|
| Pacific International |
Northern Pacific, Great Northern, and Union Pacific |
Seattle, Washington-Vancouver, BC |
|
| Pacific Limited |
Grand Trunk Western |
Chicago, IL-Montreal, PQ |
|
| Pacific Surfliner |
Amtrak |
San Diego, CA-Paso Robles, CA |
2000- |
| Palmetto |
Amtrak |
New York, NY-Savannah, GA |
1976-present |
| Pan American |
Louisville & Nashville |
Cincinnati, OH-New Orleans, LA |
|
| Panama Limited |
Illinois Central |
Chicago, IL-New Orleans, LA |
1908-1971 |
| Paul Revere |
New York Central |
Buffalo, NY-Boston, MA |
| Peach Queen |
Southern Railway and Pennsylvania Railroad |
New York, NY-Atlanta, GA |
|
| Pelican[1] |
Southern Railway,
Norfolk and Western Railway |
Washington, DC-New Orleans, LA |
|
| Peconic Bay Express |
Long Island Rail Road |
Long Island City-Greenport, NY |
1926-1950 |
| Peninsula 400 |
Chicago and North Western Railway |
Chicago, IL-Ishpeming, MI |
1942- |
| Peninsular |
Pere Marquette |
Detroit, MI-Grand Rapids, MI |
|
| Penn Texas |
Pennsylvania |
New York, NY-St Louis, MO |
|
| Pennsy Aerotrain |
Pennsylvania |
|
1956-1956 |
| Pennsylvania Limited |
Pennsylvania |
New York, NY-Detroit, MI |
|
| Pennsylvanian |
Amtrak |
New York, NY-Pittsburgh, PA |
1980- |
| Peoria Rocket |
Rock Island |
Chicago, IL-Peoria, IL |
1937- |
| Pere Marquette |
Amtrak |
Chicago, IL-Grand Rapids, MI |
|
| Pere Marquette |
Pere Marquette |
Detroit, MI-Grand Rapids, MI |
1946-1947 |
| Piedmont |
Amtrak |
Raleigh, NC-Charlotte, North Carolina |
1995- |
| Piedmont Limited |
Southern |
New York—New Orleans |
1899-1976 |
| Phoebe Snow |
Lackawanna, Erie Lackawanna |
Hoboken, NJ-Buffalo, NY as DL&W
Hoboken, NJ-Chicago, IL as EL |
1949-1961, reinstated 1963-1966 |
| Pilgrim |
|
New York, NY-Boston, MA |
|
| Pine Tree Acadian |
Boston & Maine, Maine Central, Canadian Pacific, Canadian National |
Boston, MA-Halifax, NS |
1929 |
| Pinellas |
Atlantic Coast Line |
St. Petersburg, FL-Jacksonville, FL |
|
| Pioneer |
Gulf Coast Lines, later
Missouri Pacific
|
Houston, TX-Brownsville, TX |
|
| Pioneer Limited |
Milwaukee Road |
Chicago, IL-Minneapolis, MN |
1898-1970; |
| Pioneer Zephyr |
Chicago, Burlington & Quincy |
Kansas City, Missouri-Omaha, Nebraska-Lincoln, Nebraska
Galesburg, Illinois-Springfield, Missouri
|
1934-1960 |
| Pittsburgher[2] |
Pennsylvania Railroad |
Pittsburgh, PA-New York |
1924-1964 |
| Pocahontas[3] |
Norfolk and Western Railway |
Norfolk, VA-Cincinnati, OH |
–May 1971 |
| Ponce de Leon |
New York Central |
Detroit, MI-Cincinnati, OH |
|
| Ponce de Leon |
Southern |
Cincinnati-Jacksonville |
1924–1960s |
| Pony Express |
New Jersey Transit |
Hoboken, New Jersey-Monmouth Park Racetrack |
1980-2006 |
| Potatoland Special |
Bangor & Aroostook |
Bangor-Van Buren, Maine |
-1959 |
| Powhatan Arrow[4] |
Norfolk and Western Railway |
Norfolk, VA-Cincinnati, OH |
1946–1969 |
| Prairie Marksman |
Amtrak |
Chicago, IL-East Peoria, IL |
1980-1981 |
| Prairie State |
New York Central |
Chicago, IL-Toledo, OH |
|
| Prospector |
Rio Grande |
Denver, CO-Salt Lake City, UT/Ogden, UT |
1941-1942; 1945-1967 |
| Puget Sound |
Amtrak |
Seattle, WA-Portland, OR |
1971-???? |