What Is the TSA Liquid Limit at Logan Airport?

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Knowing the TSA liquid limit at Logan Airport is key to a smooth security check. We’ll cover container sizes, bag rules, exceptions for meds and formula, plus smart packing hacks to get you through BOS faster.

TSA Liquid Rules at Boston Logan (BOS)

Standard Carry-On TSA Liquid Limit at Logan Airport

Container Size: Each liquid, gel, or aerosol must be in a container no larger than 3.4 oz (100 ml).

Bag Requirement: All containers must fit inside a single, clear, quart-sized (1 L) resealable bag.

Quantity Limit: One quart-sized bag per passenger.

Exceptions to the 3-1-1 Rule

  • Medications: Prescription and over-the-counter medicines allowed in reasonable amounts—declare at security.
  • Baby Formula & Breast Milk: Unlimited reasonable quantities; must be declared and screened separately.
  • Special Dietary Liquids: Juices or nutritionals also exempt—declare for inspection.

Packing & Screening Tips

  • Pre-Bag at Home: Load your liquids bag before heading to the airport to speed up screening.
  • Quick Access: Keep your 3-1-1 bag on top of your carry-on for easy removal.
  • Declare Exceptions: Alert the TSA agent to any meds or baby items before screening begins.

Full TSA Guidelines


Safe travels—and may your TSA liquid limit at Logan Airport no longer slow you down!

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