The best replacement for udon is soba.

The best alternatives to udon are rated as following:
★★★★★  soba
★★★★  soba noodles
★★★★  ramen
★★  pho
★  lo mein
★  yaki udon
★  rice noodles
★  lo mein noodles
  soba healthier
  ramon
  buckwheat noodles
  ramen noodles
  yaki soba
  ramen healthier
  soba which is healthier
  yakisoba
  udon

Your alternative for udon is not listed? Suggest!
Speaking about udon, one probably shouldn't forget about miso.

Other search terms related to udon and their ratings are:
★★★★★ miso
★★ dashi
You have in mind a companion for udon and it is not yet here? Propose!



Google Trends

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udon
soba
soba noodles