Hey Mikey, tons has been written about both of these topics already on the board. Here are two threads:
Flying: https://www.tinnitustalk.com/threads/flying-tinnitus.1001/page-2#post-21420
FYI: I flew recently and was scared witless, given I got tinnitus through barotrauma on a long flight. Robert Fahey, on this thread, gives a great piece of advice that I followed: Keep your mouth WIDE open during the descent, as it forces open your eustachian tubes. Yeah, you look pretty silly. You can explain what is happening to the person sitting next to you or not.
Also: I went to the ENT a week before my flight and had both my E.tube function and my sinuses checked, to make sure I didn't have a hidden infection. I then dried my head out completely with Sudafed (decongestant) beginning 36 hours in advance, and used Afrin nasal spray about 30 minutes before take off and again as descent began. And: I used Earplanes plugs, as someone else here suggested. Follow the directions on the box; read them in advance. You take the Earplanes out when you reach cruising altitude and then can pop in foam plugs or use noise cancelling headphones to cut the noise from the plane. Put the plugs back in about 30 minutes/one hour before descent (again, follow directions on the box) and do not take them out until the plane lands, is at the gate and the cabin door is opened, which is when the plane will completely equalize. Don't freak out if your ears hurt while the Earplanes are in... they are just a little uncomfortable.
By the way: The above routine might be a little more than you need if you are not pressure sensitive, as I am. But I will tell you it worked for me.
Earplugs. There are a lot of threads that discuss earplugs. Here is just one of many:
https://www.tinnitustalk.com/threads/to-those-who-avoid-clubs-concerts.2664/
You are new to tinnitus, so I dont know if you need to go the custom earplug route yet, since your T may go away. But it might be worth the investment anyway, if you are going to be in noisy environments and need ear protection. Custom plugs are the way to go (they can run a few hundred dollars). Like a lot of people here, I prefer Etymotic.
http://www.etymotic.com/ But there are many good brands. You need to have custom plugs fitted by an audiologist. I got the "musicians plugs" that have interchangeable filters, so you can somewhat carry on a conversation when you have them in if its not too noisy.
Good luck!