Current (2/2026) mirrors of this ftp site which you could use for faster download of tarball and binaries.

These should be reasonably fast around the globe:
https://lyx.mirror.garr.it/
https://mirrors.ocf.berkeley.edu/lyx/

These should be fast if you are geographically close:
https://mirror.accum.se/mirror/lyx.org/
https://ftp.icm.edu.pl/packages/lyx/
https://lyx.niranjan.co/
https://mirror.macomnet.net/pub/lyx/
https://repo.iut.ac.ir/repo/lyx/
https://mirror.ufs.ac.za/applications/lyx/
https://mirror.marwan.ma/lyx/
https://mirror.dcc.uchile.cl/pub/lyx
https://mirror.cedia.org.ec/lyx/
https://espejito.fder.edu.uy/lyx/
https://mirrors.tuna.tsinghua.edu.cn/lyx/
https://mirror.nju.edu.cn/lyx/
https://ftp.yz.yamagata-u.ac.jp/pub/lyx/
https://ftp.kaist.ac.kr/lyx/lyx/
https://mirror.twds.com.tw/lyx/
https://mirror.ossplanet.net/lyx/
https://repo.usk.ac.id/lyx/
https://mirror.aktkn.sg/lyx/
https://mirror.albony.in/lyx/
https://mirror.aarnet.edu.au/pub/lyx/
https://mirrors.ibiblio.org/lyx/
https://ftp.math.utah.edu/pub/lyx/


The primary ftp server:
ftp://ftp.lyx.org/ (= https://ftp.lip6.fr/pub/lyx )

Up to date list of mirrors can be always found at: https://www.lyx.org/Download#toc12