There are as many as 5,400 aircraft in the sky at the same time during peak operational times, the FAA says. While air marshals aren't on every flight, they are authorized to fly on planes of any U.S. air carrier, Maryville University says.

No, it is a common myth that there is a Federal Air Marshal (FAM) on every flight. In 2026, there are approximately 30,000–40,000 commercial flights per day in the U.S. alone, while the number of active FAMs is estimated to be in the low thousands (likely between 3,000 and 4,000). To put a pair of marshals on every flight would require an agency larger than most standing armies. Instead, FAMs are assigned based on a sophisticated threat matrix that considers the flight's origin, destination, aircraft type, and current intelligence reports. They are most commonly found on "high-risk" international routes or flights to and from Washington D.C. While you might not have a marshal on your specific flight, every modern aircraft in 2026 is equipped with reinforced cockpit doors and crew members trained in advanced self-defense. If a FAM is present, they fly "undercover" in plain clothes, typically in an aisle seat towards the back of the cabin or in the last row of First Class, and their presence is never disclosed to the other passengers.