| Year | Remarks |
| 1914 |
July 1 when a young enterprising American serviceman Albert Louise Ammen together with another American, Max Blouse organized a small transportation company in Iriga, Camarines Sur, with an initial fleet of one (1) auto-truck. He called the company ALATCO or the A.L. Ammen Transport Co., Inc. Its first route was Iriga-Naga.
Mr. Ammen's venture into the transport business had become so successful that soon he expanded his fleet to service the other towns of Camarines Sur, Camarines Norte, Albay and Sorsogon. ALATCO became the principal carrier in the Bicol region, inaugurating highway travel that was to open remote villages in the Bicolandia, to the mainstream of economic and social development. |
| 1942 |
World War II aborted expansion of the transport company. When it resumed operations in 1945 with surplus US Navy trucks bought from the United States Commercial Company, the company was faced with ruinous competition and beset with problems of maintaining its efficiency and safety as a result of her expanded size and nature of operations. |
| 1949 |
The Heirs of Don Nicasio Tuazon of Manila took over ownership of ALATCO, and, with infusion of new capital, embarked on an ambitious program of expansion and rehabilitation. One important development at this time was the company's "dieselization" Program that converted its gas-powered trucks to diesel. |
| 1952 |
ALATCO operated four hundred (400) units in its fleet, and it centered its fleet in Iriga. It also maintained subsidiary shops in Daet and Labo, Camarines Norte; Naga City, Camarines Sur; Ligao, Tabaco, and Legaspi in Albay; and Sorsogon and Irosin in Sorsogon. |
| 1953 |
ALATCO ventured to Quezon province by consolidating into local and express bus operations from three small bus companies servicing the area. It operated under the umbrella of the Eastern Tayabas Bus Co. (ETBCO) headed by Mr. Ramón Soler. EBTCO later entered into a 5-year lease contract with the Laguna Tayabas Bus Company (LTBCO). |
| 1971 |
ALATCO and ETBCO were sold to the Mantrade Group of the Lopas and Cojuangcos that formally amalgamated the operations of the two firms into one company. It was named the Pantranco South Express, Inc. (PSEI) to differentiate it from its northern counterpart, Pantranco North Express, Inc. |
| 1973 |
Compounded by global crises and steep escalation of fuel costs, PSEI nearly collapsed. The new owners (the Mantrade Group of the Manuel Lopa and Jose Cojuangco families) insisted on providing the service even during floods, road interruptions and bad road conditions. Debt-strapped and traumatized by high operation costs, the company's creditors decided to take over the organization. |
| 1974 |
The Creditors Syndicate of PSEI decided to develop and implement a Corporate Rehabilitation Program. The same year, the Company added Catanduanes, Samar and Masbate to its scope of operations, having formalized tie-ups with passenger ferry operators in these areas. |
| 1978 |
PSEI introduced its air-conditioned coaches in its southern route. |
| 1980 |
The Company expanded its freight service operations and moved its central offices and terminal at its present site in Pasay City. |
| 1981 |
The Company pioneered in Eastern Visayas and by year-end had connected all of Leyte and Samar provinces to the Luzon mainstream. PSEI also entered the sea transport business with its passenger and vehicle ferry, linking the ports of Matnog, Sorsogon and Allen, Northern Samar. |
| 1982 |
A new level of service was inaugurated with the addition of Royal Class and new air-conditioned coaches with toilets and VCRs in the company's fleet. PSEI also became the first bus company in the Philippines to computerize its operations. |
| 1984 |
PSEI, together with two other ferryboat operators, formed a joint venture company, the St. Bernard Services Corporation (SBTC) that now operates in the San Bernardino Strait, with the government ferry boat, Maharlika I. In the same year, the company changed its name to Philtranco Service Enterprises, Incorporated. |
| 1986 |
Commemorated the first Luzon-Visayas-Mindanao (LUZVIMINDA) run that became the first trans-Philippine bus-cum-ferry-operation. Now PSEI has seven ferryboat operations crossing Matnog and Allen, and Liloan, Southern Leyte and Surigao City, Surigao del Norte. Having opened the southern frontiers of Mindanao to Luzon and Visayas with its inter-modal transport service, Philtranco hopes to contribute its share in effecting the real unification of the nation where the economic, educational, cultural, political and social opportunities are shared by every Filipino. |
| 1999 |
April 1999 when Penta Pacific Realty Corporation acquired PSEI headed by businessman Jose C.H. Alvarez. This new group immediately programmed a fleet replacement of 80 units costing PHP250 million. |
| 2000 |
June 2000 when The 29-seater Gold Service Bus was introduced, initially serving key cities in the Bicol region, with a coach stewardess as additional crew to assist passengers, giving the same service as that of an airline. |
| 2001 |
June 1 when PSEI implemented the Passenger Check-in and Baggage Tag System procedures for the security, convenience and comfort of our riding public. PSEI is the first bus company in the country to adopt this system patterned after the airline system. Today, Philtranco is a symbol of progress in the Philippine transport industry. The Company continues to blaze new trails with the innovations in its levels and brands of services. |
| 2004 |
Philtranco, the country's lone integrated land and sea transport company, is embarking on a PHP4 billion (US$75 million) investment program over a five-year period to acquire new fleet of buses and ferry boats, and improve and expand its terminals. Philtranco CEO Jose E.B. Antonio said the expansion is in response to President Gloria Macapagal-Arroyo's push to modernize the country's land and sea transport service of goods and passengers through five major islands—Luzon, Mindoro, Panay, Negros and Mindanao. |
| 2007 |
In promoting Clark International Airport, Pampanga, as an alternate to its counterpart in Manila, Ninoy Aquino International Airport - Philtranco offers a daily Manila-Clark-Manila trip schedule. |
| 2010 |
Philtranco Released its new type of Deluxe Service called Piltranco Airbus 380, the newest addition of Executive Class fleet of Philtranco. 26 fully reclined seats with leg rest in 2x1 arrangement, 2 Flatscreen TVs (Front and Center) equipped with stereo surround sound and DVD, and On- Board Comfort Room. Daily non- stop trips to Naga and Legaspi from Pasay/ Cubao/ Alabang and Turbina. Feels like boarding on a first class Airbus 380. Only at Philtranco. |
| 2014 |
When the LTFRB in 2014, mandated that all PUBs that are 15 years of age shall be phased out imposing heavy penalties for violations, Philtranco phased out its MAN Modulos and SR Exfohs acquired and rehabbed in the late 1990s and early 2000s, replacing them with SR UD Trucks PKBs, Daewoo BF106's and BS106's, and Penta Moduliners (SR Moduliner + SR Cityliner), and has restored much of its old fleets in time for its centennial anniversary. |
| 2016 |
Archipelago Philippine Ferries Corporation along with Philtranco and its affiliate, Jam Liner joined as one for their modernization program which aims to link their service from Luzon, Visayas and Mindanao. Accordingly, they're aiming to have at least 1000 fleets.[5][6] |
| 2025 |
Philtranco and its subsidiary Amihan Bus Lines Inc., temporarily ceased operations due to financial problems, but later resumed their operations. |
