Yeah, perhaps. Han did acknowledge that Bespin was "pretty far, but I think we can make it," too. Still, it would take years if the scale is like our solar system, but as xhonzi said, we can imagine that Star Wars systems, or perhaps even just Hoth, Anoat, and Bespin, are closer than the norm.

Just an added thought, it appears that Luke never jumps to hyperspace either. He wants to "keep it on manual for a while," and thereafter steers a bit, implying a sublight trip. I guess all these systems might be pretty close. But again, you can't rip a movie like this for not being scientifically accurate. You watch it for enjoyment, not physics lessons.