Factual error: Before receiving the North American P-51D Mustangs, the Red Tail squadron was using the Curtiss P-40E Warhawk. The movie shows the Warhawks being able to keep up with the German Bf 109 G-6s quite easily, fighting on even terms. In reality, the Bf 109 G-6 could easily outperform the Warhawk, being able to easily outrun and out-turn the Warhawk. Still, the Bf 109s are no match for the Warhawks.
Factual error: When the agent searches for Abu Ahmed in Peshawar, Pakistan, in one scene he gets out of his car, and a shop named Bhatia sons appear in the background, a company based in Delhi, India. In the next scene he is walking down a market, where a sign board of Jaggi sweets, (existing in Punjab, India) is seen, with words written in Hindi (only to be found in India).
Continuity mistake: The German and British airmen are looking at the Northern lights. From the rear the men are apart, but the front shots of them show them much closer to each other.
Character mistake: It's said in the movie a vice presidential candidate never gave a concession speech. Geraldine Ferraro did this in 1984.