To express good wishes to someone about to set off on a journey we use the words -

Bon voyage

English Meaning: used to express good wishes to someone about to set off on a journey.
Bangla Meaning: সফর / যাত্রা শুভ হোক

Ex. Sentence: Bon voyage! See you again.
Bangla Meaning: সফর শুভ হোক! আবার দেখা হবে।

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Bury the hatchet
English Meaning: end a quarrel or conflict and become friendly.
Bangla Meaning: ঝগড়া মিটিয়ে ফেলা।

By a long chalk
English Meaning: By far
Bangla Meaning: নিরঙ্কুশভাবে, ঢের ঢের বেশি।

By and by
English Meaning: before long / eventually / ultimately / shortly.
Bangla Meaning: অবশেষে / অনতিকাল মধ্যে / অবিলম্বে / দেখতে দেখতে

Source: Lecture