Last checked: July 2026 — sourced against TSA “What Can I Bring?” and FAA PackSafe. Rules change; re-verify before you fly. This is not legal advice.
The verdict, in one line
Only one kind of CBD oil is allowed on a plane: hemp-derived CBD containing no more than 0.3% THC, or an FDA-approved CBD medication (Epidiolex). That type is permitted in both carry-on and checked bags. Any CBD or cannabis product over 0.3% THC — including marijuana-derived CBD, even where it’s legal in your state — remains illegal under federal law and is not allowed. If it’s a liquid, the carry-on version also has to follow the 3.4 oz (100 ml) rule. TSA lists this item under “Special Instructions,” which is its way of saying: it’s conditional, and the officer decides.
The line that decides everything: 0.3% THC
Federal law (the 2018 Farm Act) draws a hard line between hemp and marijuana at 0.3% THC by dry weight. TSA follows that line exactly. Its policy allows “products that contain no more than 0.3 percent THC on a dry weight basis or that are approved by the FDA.” Everything above that threshold is federally a controlled substance, regardless of your state’s laws — and airport checkpoints are federal ground.
- Allowed: hemp-derived CBD oil at or under 0.3% THC.
- Allowed: FDA-approved CBD medicine (Epidiolex), treated like any prescription.
- Not allowed: marijuana-derived CBD, “full-spectrum” oils that exceed 0.3% THC, or any THC/cannabis product over the limit.
TSA officers don’t test THC content, and their agents aren’t searching for drugs — but if a search turns up something that appears to break the law, they refer it to law enforcement. Whether that leads anywhere depends on local police and local law. The safe reading: only fly with clearly-labeled hemp-derived CBD, and be ready to show it’s compliant.
If it’s a liquid, 3-1-1 still applies
A compliant CBD oil or tincture is still a liquid, so in your carry-on it follows the normal 3-1-1 rule: the bottle must be 3.4 oz (100 ml) or less and go in your quart bag. Most CBD tinctures are 1 oz (30 ml), so this is rarely a problem. In checked bags there’s no size limit on the liquid itself. Solid forms — capsules, gummies, balms — aren’t liquids, so they skip the quart bag entirely and are the least fussy way to carry CBD, as long as they meet the same 0.3% THC rule.
Note: if your CBD is a vape cartridge or pen, that’s governed by battery rules, not liquid rules — vapes and their lithium batteries must travel in the cabin, never in checked baggage, and can’t be used or charged onboard.
How to pack it to avoid a hold-up
- Keep the original labeled packaging so an officer can see it’s a hemp CBD product, not something else.
- Carry the Certificate of Analysis (COA) — the lab report showing THC at or under 0.3%. It’s the single most useful document if you’re questioned.
- Liquid CBD: 3.4 oz max in carry-on, in the quart bag; any size in checked.
- Prefer solids (capsules/gummies) for the simplest screening.
The airline & international layer — where it gets risky
US airlines follow federal law, so a compliant hemp CBD product is fine on domestic flights. International travel is a different world, and this is where travelers get into real trouble:
- Many countries ban CBD outright regardless of THC content. Some — including popular destinations in the Middle East and parts of Asia — treat any cannabis-derived product as a serious criminal matter, with penalties far beyond a confiscation.
- Even a compliant US product with a COA can be illegal at your destination. The 0.3% rule is a US rule; it does not travel.
- Crossing a US border (customs) with cannabis products, including some CBD, can create problems even when TSA screening didn’t.
Before any international trip, check the destination country’s own rules — do not assume US legality carries over. When in doubt, leave it home. The checkpoint officer, and foreign authorities, always have the final say. Rules last checked July 2026; this is general information, not legal advice.
Sources & verification
Every claim on this page was checked against the primary sources below and last verified July 2026.
- TSA — Special instructions permitting only hemp-derived CBD at or under 0.3% THC (the federal 2018 Farm Act hemp threshold) or FDA-approved CBD medicine. tsa.gov/…/medical-marijuana
- TSA — The 3-1-1 liquids rule that applies to liquid CBD in carry-on bags. tsa.gov/…/liquids-aerosols-gels-rule
Related rules: Flying with medication · Medication · Disposable vapes · The 3-1-1 liquids rule
FAQ
Is CBD oil allowed on a US flight?
Yes, if it’s hemp-derived with no more than 0.3% THC, or an FDA-approved CBD medicine. It’s allowed in carry-on and checked bags. Anything over 0.3% THC is not.
Does my state’s legal marijuana CBD count?
No. Airport checkpoints are federal ground, and marijuana-derived CBD is federally illegal even if your state allows it. Only hemp-derived CBD at or under 0.3% THC is permitted.
Do I need to keep CBD in my carry-on size limit?
If it’s a liquid or tincture, yes — 3.4 oz (100 ml) max in the quart bag for carry-on. Capsules and gummies aren’t liquids and skip that limit. Checked bags have no size limit on the liquid.
Can I fly internationally with CBD oil?
Be very careful. Many countries ban CBD entirely, and some impose severe penalties. A compliant US product can still be illegal abroad. Check the destination’s laws first; when unsure, leave it at home.