This is the blessing I heard many times. The first time in Le Puy, then Conques, then other places:
All-powerful God,
you always show mercy toward those who you love
and you are never far away for those who seek you.
Be with your servants on this pilgrimage
and guide their way in accord with your will.
Be a companion for them along their journey,
a guide at crossroads,
strength in their weariness,
defence before dangers,
shelter on the way,
shade against the heat,
light in the darkness,
a comforter in their discouragements,
and firmness in their intentions,
in order that, through your guidance,
they might arrive unscathed at the end of their journey and,
enriched with graces and virtues,
they might return safely home;
through Jesus Christ Your Son,
Who lives and reigns with You,
in the unity of the Holy Spirit, one God,
for ever and ever.
Blessings to all pilgrims, past, present, and future