Use Reflector to update your pacman mirror list

1sudo pacman -S reflector
2
3sudo vi /etc/systemd/system/reflector.service

1[Unit]
2Description=Pacman mirrorlist update
3
4[Service]
5Type=oneshot
6ExecStart=/usr/bin/reflector --verbose --country 'Portugal' -l 5 -p http --sort rate --save /etc/pacman.d/mirrorlist

1sudo systemctl start reflector