The reason why your source does not give the starting location (Los Angeles) is because it took him months to do it due to weather and other delays, so the arrival notification just included the final legs:
The Brooklyn Daily Eagle Almanac, 1912
Robert G. Fowler (Wright Model B), started from San Francisco for New
York Sept. 11, 1911, reaching Colfax, Cal. A second start was made
from Los Angeles Oct. 18, and on Dec. 7, 1911, had reached Orange,
Tex., a distance of 1,679 miles, measured in straight lines between
towns, having been on his way 51 days.
FOWLER COMPLETES TRANS-CONTINENTAL FLlGHT
Robert G. Fowler, the second aerial transcontinental tourist, finally
arrived at the Atlantic Ocean, at San Pablo beach, Fla., on Feb. 17,
after having been 122 days on the way. A great deal of this time was
consumed by reason of bad weather. The course followed was southerly
all the way, close to the Gulf of Mexico through the extreme southern
states to the coast.
Up to Jan. 11, at Biloxi, Miss., his mileage was 2,081, in straight
lines between towns. Rodgers' flight was 3,391 miles. From then to
February 17, he flew 436 miles in eleven stages. His itinerary
Jan. 16, Evergreen, Ala., 84; Jan. 17, Georgiana, 17; Andalusia, 25;
Jan. 20, Brantley, 22; Jan. 25, Troy, 23; Feb. 6, Bainbrldge, Ga.,
106; Feb. 7, Thomasville, 38; Feb. 7, Qultman, 27; Feb. 8,
Jacksonville, Fla., 82; on Feb. 17, he flew to Pablo Beach, 15 miles.
Fowler was dispatched all along the Seaboard Airline Railroad the same
as a passenger train; and his manager Charles L. Young was posted
every few moments in this way. As soon as Fowler was announced to be
within 17 miles of the City of Jacksonville everyone seemed to loose
their every thought of business, and spent the few moments watching
for him to put in an appearance. When he was finally sighted at 4.30
the crowd at the Moncrief Race track seemed to go wild, and Aviator
Max Lillie in his Wright biplane, dashed into his machine and flew
away like mad to meet him he was immediately followed by Harold
Kantner in his Moisant monoplane. The two aviators flew toward Fowler
to greet him as best they could in the air. then circled Fowler, and
escorted him toward the field. Lillie landed first to show Fowler the
way. Fowler then circled the field 3 times and gave several dips and
spiral dives that made the crowd stand up and yell with all their
might. He then landed and was followed by Kantner. Fowler had been in
the air but 90 minutes but it was a very cold day and he was almost frozen.
After being given a right royal reception he was escorted to an automobile and rushed to
the Seminole hotel where he was made the guest of honor. The evening
was spent in trying to make Fowler feel at home, and he was given the
key to the city and told to go as far as he liked.