Cook the fettuccine according to package instructions.
While the pasta cooks, season the salmon with salt and pepper.
In a skillet over medium-high heat, add olive oil and sear the salmon for about 4-5 minutes on each side.
Remove the salmon from the skillet and let it rest before flaking it into bite-sized pieces.
In the same skillet, add minced garlic and sauté for about a minute.
Pour in the heavy cream and lemon juice, stirring well to combine.
Add the cooked fettuccine and flaked salmon to the skillet, tossing to coat evenly.
Adjust seasoning with salt and pepper, and add reserved pasta water if the sauce is too thick.
Garnish with fresh dill before serving.