今日は、ラーメン食べようかな・・・って英語でなんて言うの？

"I feel like (food's name)" means that you feel like eating that food. We use "feel" often when talking about the kinds of foods we want to eat.

Example: What do you feel like today? / I feel like sushi.
How about eating noodles? / Nah, I don't feel like noodles today.

〜かな。。。 can be expressed by adding "maybe" or "I think"

今日ネットフリックス見たいかな。。。 = maybe I'll watch Netflix today ...

You can use that expression for doing activities, including eating food.

1. I think I'll have ramen for dinner.

   Putting "I think" before a sentence is a way of stating your opinion about something. In this case,
   the person is stating an opinion about what they will have for dinner.
   Other examples include:-

   A. I think I wear my pink dress to the party.
   B. I think I'm going to dye my hair red.

"I have a craving for some ramen tonight." You can use the words "craving" or "go for" to describe that you want to eat something very much.

Yes, whilst having an inner discussion with yourself, you may use either of the above suggestions. The second example especially, is just a flow of thought looking at the possibility of having ramen later on.

When you're thinking to yourself, you may have all sorts of suggestions. Using the phrase like "I think" or even "feel for" express what you want to have, usually in food.