Regulation Text
Unless otherwise authorized by ATC, no person may operate a civil aircraft between Mexico or Canada and the United States without filing an IFR or VFR flight plan, as appropriate.
The short answer
(14 CFR § 91.707) requires that, unless otherwise authorized by ATC, no person may operate a civil aircraft between Mexico or Canada and the United States without filing an IFR or VFR flight plan, as appropriate.
Research Notes
Common Questions
Is a flight plan required to fly between the U.S. and Canada or Mexico?
Yes. Unless ATC otherwise authorizes it, a pilot must file either an IFR or VFR flight plan, as appropriate, to operate a civil aircraft between Mexico or Canada and the United States.
“Unless otherwise authorized by ATC, no person may operate a civil aircraft between Mexico or Canada and the United States without filing an IFR or VFR flight plan, as appropriate.” — 14 CFR § 91.707
Can the border ever be crossed without a flight plan?
Only if ATC authorizes it. The rule's prohibition applies “unless otherwise authorized by ATC,” so the flight plan requirement is the default.
“Unless otherwise authorized by ATC, no person may operate a civil aircraft between Mexico or Canada and the United States without filing an IFR or VFR flight plan, as appropriate.” — 14 CFR § 91.707
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AOA's Decoded pages are plain-English interpretation for training and reference. They are not legal advice and do not replace the official regulation. Always confirm current requirements against the authoritative source before acting.