Recreational Marijuana States. Four states, including Alaska, Oregon, Colorado, and Washington, as well as Washington D.C. have passed ballots legalizing recreational marijuana. The amount you can possess at one time, however, varies between the states.
As of January 31, 2014, passengers traveling internationally into the U.S. and connecting to another flight are allowed to have in their carry-on baggage liquids in excess of 3.4 ounces (100 mL) that were purchased as duty-free merchandise.
If you wish to travel with more than 3.4 ounces of fluid, you must transport it in your checked luggage. To be permitted on the airplane, the 3.4 ounce bottle must not contain a fluid that is flammable, such as paint. It you bring 3.4 ounces of fluid on a plane, you must place the bottle in a clear, 1-quart, sealed bag so TSA security screening agents can inspect it.