chances are

Adverb

idiomatic not-comparable

(idiomatic) It is likely that, it is probable that

Japanese Meaning

おそらく / たぶん / ～だろう

If you leave your passport on the table, chances are you'll miss your flight.

もしパスポートをテーブルに置き忘れれば、飛行機に乗り遅れる可能性が高いです。

Sense（1）

(idiomatic) It is likely that, it is probable that

If you leave before 7, chances are you'll miss the traffic.