Most Likely Legal In All 50 States

https://www.amazon.com/Spyderco-Delica-Exclusive-blade-Khaki/dp/B00KSPI3ZQ

The Kahr Arms Delica was made for "most" jurisdictions with strict knife laws. Always best to check specific laws when traveling.

I tested several small but relatively heavy duty folding knives, and wrote an article on the topic, about four years ago. We discussed it here on THR at https://www.thehighroad.org/index.php?threads/short-blades-with-big-grips.727842/ . Sadly, shooting reviews is no longer, and several of the knives in the article have been discontinued. However, the discussion linked to here on THR might give you some ideas as starting points.

NYC has it's own rules, one of which prohibits locking blades. May be similar in other jurisdictions, so that might be something to look into. Legal blade length will also differ from place to place. Something like a smaller non tactical looking Swiss Army Knife may be what you're looking for.

The prohibition in NYC is for sale of locking blade folding knives with a blade of 4" or more.

Here is the relevant section from the NYC Administrative Code 10-134:

"It has been found that folding knives with a blade of four (4) inches or more that locks in an open position are designed and used almost exclusively for the purpose of stabbing or the threat thereof. Therefore for the safety of the city, such weapons should be prohibited from sale within the jurisdiction of the city of New York.

b. It shall be unlawful for any person to sell, or offer for sale within the jurisdiction of the city of New York, any folding knife with a blade length of four or more inches which is so constructed that when it is opened it is locked in an open position and cannot be closed without depressing or moving a release mechanism."

You may not even possess a knife with a blade over 4" in public, this from NYC administrative code 10-133:

b. "It shall be unlawful for any person to carry on his or her person or have in such person’s possession, in any public place, street, or park any knife which has a blade length of four inches or more."

"...flying on commercial airlines..." Most of 'em have knife rules too. Otherwise, the Transportation Security Administration makes the rules. Starting with knives are allowed in your checked luggage only.
https://www.tsa.gov/travel/security-screening/whatcanibring/sharp-objects

Walking cane

I travel all over the place. About 50% travel. I always carry my benchmade mini griptilian. It does in the luggage and is retrieved upon arrival. It is alwayscarried, even to customer sites. I hit most of the big cities.

A good hard wood or other type cane. see the thread do you carry a cane lots of sound info.I carry mine on flights any where.A hard rap on the arm droped a gun once I’m not saying it was smart and I don’t think he expected it but it worked and no one died.Though that cane can be deadly if needed. He ran I walked aways a good ending and I turned the gun in to the police.
Same as any weapon training and practice are the best way to protect yourself and those with you,If he just wants your wallet carry an extra one to give to him maybe that will end it.If not thats why we train right.
Turning a gun used in a crime against you is a big HASSLE,but the thought that that gun my have been used in a crime before is enough reason to do the right thing.

JShirley said:

You might consider useful items that can be pressed into service as expedient weapons. I have, for instance, carried lanyards with a heavy carabineer on one end, and either my keys or a sturdy small flashlight on the other, through almost every flight I've taken in the last 18 years.

Braided paracord is very strong, and a 3 strand braid is wide enough to not burn you as it slips/flows through your hand. This is one of the most practical, low observability expedient distance creators you can have, but be advised, PRACTICE is mandatory. Before I carried the lanyard, I always wore a sturdy belt and had a padlock on my carry-on bag. In either case, you have useful items that can fill other roles unless you need to use them defensively.

John

Click to expand...

I also carry a strong flashlight as part of my EDC. I can take it everywhere.

To the best of my knowledge a SAK is legal except for a Court house!. I carry a cane,flashlight and a zebra ink pen.

I got into an argument with a guy at a bar probably 10 years ago. He ended up pulling a knife, so I took off my belt and towel whipped it at him. He took off running. Ever since then, I only buy belts with heavy buckles that would do damage if I needed it to.

I even thought about modifying my belt buckles with my bench grinder to be sharp or pointy etc.

Too bad you couldn't chase him with your pants around your ankles

HA HA, good point

Koppo stick may also be worth looking into, or koppo cord wrap an object like your flashlight if its the right size. It is a striking device in the end but with some training better than a hand.

The knife will always be a possible issue since you never know when a LEO will want to use it as a reason to engage with you. Very low risk, but can happen. Pocket clips, if visible may draw those questions. Have only had it happen once (in the lovely hole which is Baltimore, md where of course an active duty military guy walking with his girl friend with a pocket knife in his pocket is the key threat among all the drugs and murders there). Reason 232342349 I don't go into B'more if I don't have to even though I sadly am still stuck in this state.

Something like a CRKT Bear Claw in your pocket, with the sheath tethered to your belt so it come off in the draw is worth considering. Short blade but the design has some gains to it.

I carry a fiberglass cane with a brass fritz-style handle these days. When I was younger, I carried a Cold Steel Sharkie which I used only once when someone in a border town tried to take my car. It was very effective. I flew a lot at that time, so I sanded off the stupid shark face so it just looks like a fat Sharpie pen.