Factual error: The film is set up until the USA enter the war, which was April 1917. The Germans always appear flying Fokker Dr.I triplanes, which flew for the first time in August and only appeared in any significant numbers over the front in November. Granted, the triplanes were a great way of letting the audience know who were the good and bad guys when so many similar-looking aircraft were together in the sky at the same time and in such haste.
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Mistakes
The Zeppelin shot down in this movie is labeled L32. The real L32 was shot down over England (near Billericay) , rather than France, and during night raid, not in daylight. See more...
Flyboys mistakes
Factual error: The Zeppelin shot down in this movie is labeled L32. The real L32 was shot down over England (near Billericay) , rather than France, and during night raid, not in daylight.
Factual error: In the beginning of the movie William supposedly boards the train in Lincoln, Nebraska. All the vehicles in the train are from Europe and never rolled in the United States.
Flyboys trivia
Blaine is given a small bear which he carries as a good luck charm. This is a reference to the 1927 movie Wings, the first ever film to win the Academy Award for Best Picture, in which a pilot also carries a small bear as a good luck charm.