'awfully far' is correct and usable in written English.
You can use it when you want to emphasize how far something is. For example, "We have to drive awfully far to get to the beach."
"Europe is awfully far away," he said.
Those things have already taken him awfully far.
But on Friday the youthful victories seemed awfully far away.
(Also, the modifying phrase "called roaming fees" has roamed awfully far from what it modifies, "charges").
"If he's calling people like the baby sitter in the Michael Kennedy case, that's going awfully far afield.
I agree that most of the countries in question are awfully far away, as a quick glance at an atlas will attest.
You're awfully quiet so far.
Breaking into publishing is difficult, but the endeavor has been "an awfully slow burn" so far, said Jonah Weiland, executive producer of Comic Book Resources, a Web site about graphic novels.
I just felt like he was so far away that awfully early in the day with a two-shot lead to try that shot.
A little of this goes an awfully long way, although not far enough to explain the nature of the relationship between Goldberry and Tom.
"I looked down and could see the lights and thought we were awfully low for being that far out (from the airport).
