How Long Do Seasoning Packets Actually Last? - Tasting Table
Briefly

According to the USDA, seasoning packets can last two to three years, with whole spices typically lasting longer than ground spices due to their ability to retain flavor.
Expired seasoning won't harm you; however, it loses its potency over time and could ruin the flavor of your dish, so it's best to use fresh packets.
People often use only part of their seasoning packets to avoid waste. Unique ideas include mixing ramen seasoning with sour cream or sprinkling ranch powder on popcorn.
To extend the lifespan of seasonings, store them in a sealed bag in a cool, dry place, ideally the pantry, away from heat sources.
Read at Tasting Table
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