The Online Passenger Lists Guide has two pages:
Online USA Ship Passenger Lists (this page) and Online International Passenger Lists (next page)
United States Passenger Lists & Records (Arrivals)
to New York
New York Indexes 1820-1957...
Alaska Alien Arrivals 1906-1949 - Name Index & Microfilm Images (at Ancestry.com/requires payment)
to Baltimore and Maryland
Baltimore Passenger Lists Online Index 1820-1948 (at Ancestry.com/requires payment) includes digitized images of the passenger lists
Ship Julius & Eduard Passenger List - Bremen to Baltimore 1834
Brig Ferdinand Passenger List - Bremen to Baltimore 1834
Baltimore Passenger Lists 1820-1840s - Filling in the Gaps research guide for locating missing Baltimore lists - includes a searchable database for the 1st 6 months of 1839
Passenger List of The Ark and The Dove arrived in St. Mary's City, Maryland, 1634
Also see: Baltimore Passenger Lists Quick Guide 1820-1960s
to Boston and New England
California, Passenger and Crew Lists, 1882-1959 (at Ancestry/requires payment) includes Burbank, Los Angeles, San Diego, San Francisco, San Luis Obispo, San Pedro and Ventura; coverage varies by port
Florida Passenger Lists Index and Images 1898-1951 (at Ancestry.com/requires payment) includes the following Florida ports: Key West, Knights Key, Panama City, Pensacola, Port Everglades, St. Petersburg & Tampa (coverage varies by port)
Index to Chinese, Japanese, and Portuguese Passenger Manifests for Hawaii, 1843-1900 (from the Hawaii State Archives)
Honolulu, Hawaii, Passenger and Crew Lists, 1900-1959 (at Ancestry.com/requires payment)
to New Orleans
New Orleans Passenger Lists Index & Images 1820-1945 (at Ancestry.com/requires payment)
New Orleans Passenger Arrivals 1813
New Orleans Passenger Arrivals 1815
New Orleans Passenger Lists - Filling in the Gaps 1845 & 1847 (Jan, Feb, March) transcriptions from the WPA transcripts & Quarterly Abstracts
Ship Passenger List: the John Holland, from Le Havre to New Orleans, 1847 [on this website]
Transcription of the passenger list for the John Holland which sailed from Le Havre, France to New Orleans, arriving on 20 June 1847 with 150 passengers, all from Germany.
Inward Slave Manifests 1818-1860, Port of New Orleans
These little used records document the movement of slaves from the Eastern seaboard to New Orleans.
Also see: Finding New Orleans Passenger Lists [on this website]
Oregon Passenger and Crew Lists 1888-1957 (at Ancestry.com/requires payment)
Philadelphia Passenger Lists - Index & Images 1800-1945 (at Ancestry.com/requires payment) includes images of the passenger lists from the microfilm
Hebrew Immigrant Aid Society, Philadelphia Bank Immigrant Passage Records, 1890-1949 over 130,000 entries documenting Jewish immigrants to Philadelphia and other ports (at Ancestry/free with registration)
Pennsylvania German Pioneers, 1727-1808
Also see: Philadelphia Passenger Lists Quick Guide, 1800-1948
to San Francisco
Case Files of Early Immigrants to San Francisco and Hawaii
presently covers Honolulu files 1903-1944 and San Francisco files 1884-1915
The Maritime Heritage Project: Ships to San Francisco 1849-1868 (includes many online transcriptions)
New York City to California via Central America 1848-1873 (some years missing)
Chronicles passengers who sailed from New York City to California (mostly San Francisco). Taken from the New York Times & other newspapers. Also includes some sailings from Boston & New Orleans.
San Francisco Passenger Lists 1893-1957 Index & Images includes digitized images of the passenger lists (at Ancestry.com/requires payment)
to South Carolina/the Carolinas
South Carolina Passenger Arrivals 1700s includes...
Texas Seaport Museum - Galveston Immigration Database
Here you will find a database containing over 130,000 passengers who arrived at Galveston, Texas from 1846-1948.
Corpus Christi: Passenger and Crew Lists of Vessels Arriving at Corpus Christi, Texas, and Vicinity, June 1948-January 1959 at FamilySearch; from NARA microfilm publication A3458
Indianola Texas Immigrant Database
Also see: Finding Galveston Passenger Lists [on this website]
to the Virgin Islands
United States, Virgin Islands Index to Passenger Arrivals, 1906-1947 at FamilySearch
Passengers to Norfolk & Portsmouth, Virginia in 1823
Virtual Jamestown: the Virginia Company Adventurers Database 1620
Also see: Finding Passenger Lists Before 1820 [on this website]
United States - More Ports
If you don't see a U.S. port listed above, you might try...
U.S. Ports of Arrival and their Available Passenger Lists 1820-1957 (for online and offline research)
Next Page: Online International Passenger Lists - Australia, Canada, Germany, Ireland, United Kingdom and more