Can I Fly With It gives a verdict — carry-on, checked, or not at all — for one item at a time. Because a wrong verdict can mean a confiscated item, a missed flight, or worse, this page explains exactly where those verdicts come from, how often we re-check them, and the one limit no reference can promise around: the officer at the checkpoint always has the final say.
How we research an item
For each item we establish the baseline U.S. rule first — is it allowed in the cabin, in checked baggage, or prohibited — and the reason behind it, then the specifics that actually trip travelers up: quantity and liquid limits, lithium-battery watt-hour thresholds, whether a device must be carried on rather than checked, and how major U.S. airlines or common international authorities diverge from the baseline. We lead every page with the verdict and only then explain the “why”, because that is the order a packing traveler needs it in.
The primary sources we use
- TSA “What Can I Bring?” — the official U.S. screening guidance for carry-on and checked items.
- FAA PackSafe — the federal authority for hazardous materials in baggage, including the lithium-battery and power-bank watt-hour rules and spare-battery limits.
- Airline baggage and restricted-items pages — the carrier’s own published policy, which is what governs per-passenger caps and any rule stricter than the TSA baseline.
- International civil-aviation and customs authorities for the destination nuances where a common item is treated differently outside the U.S.
What we don’t rely on
We do not source rules from other travel blogs, forum anecdotes, or “I flew with this once” stories — those are how outdated limits spread. If a number cannot be tied back to TSA, the FAA, or the airline’s own policy, we do not publish it as a fixed rule; we say it varies and tell you whom to confirm with.
Verification, dating, and re-checking
Every item and rule page carries a visible “last checked” date, because these rules genuinely change — lithium-battery limits, liquid-scanner rules, and vape policies have all shifted in recent years. Fast-moving categories (batteries, liquids, vapes) are re-checked on a quarterly cadence, and airline per-passenger caps are re-verified before we treat any number as fixed.
The one limit we can’t remove
A screening officer can refuse any item at their discretion, even one that is generally allowed. Treat this site as careful preparation, not a guarantee — and when an item is borderline, the safest place for it is your checked bag or at home.
Corrections
If a rule has changed or a verdict looks wrong, or there’s an item you’d like us to cover, please tell us through the contact page. A correction that points to the current TSA, FAA, or airline page is especially valuable; we re-verify and re-date the page when we act on it.
A note on how these pages are produced
Our pages are produced with the help of AI research and drafting tools, working against the primary sources above. AI speeds up the work; it does not get the final say on the rules. Every verdict, limit, and battery threshold is checked by a human-supervised process against TSA, FAA, or airline guidance before it is published, and dated when checked. We say this plainly because a rules reference is only as trustworthy as it is honest about how it’s made.