Does my plane ticket have to match with my ID Name?

I have two last names and I rarely ever go by my second last name that's why on my plane ticket I forgot to put my second last name. Will this be a problem at the airport?

Yes you will have a problem. You have 2 options. 1. Change your ID. Or 2. Bring the documentation as to why you have 2 last names, (marriage license, adoption, etc)

Yes, they need to match. The only problem caused is that you won't be able to fly.

Yep.

If you are flying Internationally then you need to get the name changed on your ticket to match your full legal name on your Passport. Depending on the airline and type of ticket, some airlines are more willing to do this however they may charge you.

If you are flying domestically within the US it would still be best to get your ticket changed to match your ID. However, if you can't you should be able to get through security with additional security checks. In that case I would plan on arriving at the airport at least 2 hours in advance to make sure you can be there in time to handle any extra delay.

Of course.

I'm assuming you traveling from or with the US

It is highly recommended that your boarding pass matches with your ID. For such situations, I usually use one of the two last names if it coincides between boarding pass and ID. However, Washington is becoming more strict regarding this.

Assuming your last names are hyphenated, i.e. Black-Dog, you need to use both names as princess your ID, if it's shown Black Dog, then you could use just Dog, but not just Black.