Someone already mentioned zabihah.com so that's a good start. Very few fast food places are halal.

Next, understand the differences between kosher and halal. I eat kosher meat but other fellow muslims don't. It's up to you, however kosher is typically more expensive than regular meat and in some places are more difficult to find than halal meat

Finally my recommendation is go vegetarian/fish for the duration. I did it for weeks at a time when I was travelling and mostly spent time at small towns in France. It's not hard, the traditional muslim scholars were mostly vegetarian if you read islamic history. This is probably healthier too.