Baltimore/Washington International Thurgood Marshall Airport liquid rules: 100 ml limit
Flying from Baltimore? The verdict, the airport's own wording and its source link are below. Checked 6 November 2026 against the airport's own website. Same rules for hand luggage and carry-on.
The airport's security page restates the 3-1-1 rule: 3.4-ounce (100-milliliter) bottles in one quart-sized clear zip-top bag per passenger, placed in the screening bin. Medications, baby formula and food, and breast milk may exceed three ounces if declared.
| Liquid container limit | 100 ml limit |
| Clear plastic bag needed | Yes |
| Liquids can stay in your bag | No |
| Laptops can stay in your bag | Not stated |
What this means at Baltimore/Washington International Thurgood Marshall Airport
- Airport states: "3-1-1 for carry-ons: one (1) quart-sized, clear, plastic, zip-top bag"
- Airport states: "one (1) bag per passenger placed in screening bin"
- Airport states: "Medications, baby formula and food, breast milk, and juice are allowed in reasonable quantities exceeding three ounces and are not required to be in the zip-top bag."
- Airport's own wording: "Declare these items for inspection at the checkpoint."
- Airport states: "If in doubt, put your liquids in checked luggage."
- Airport states a carry-on should not exceed 22 x 14 x 9 inches, plus one personal item.
Source: Security | BWI Airport. Checked 6 November 2026.
Security rules are set by the airport, but your bag size is set by your airline. Check your bag against every airline here.
Frequently asked questions
What are the liquid rules at BWI Airport?
The airport states 3.4-ounce (100-milliliter) bottles or less, in one quart-sized, clear, plastic, zip-top bag per passenger, placed in the screening bin.
Do I need a clear plastic bag at BWI?
Yes. The airport describes a quart-sized, clear, plastic, zip-top bag.
Can I bring baby formula or medication at BWI?
The airport states medications, baby formula and food, breast milk, and juice are allowed in reasonable quantities exceeding three ounces, and should be declared for inspection.
Are liquid rules the same at my destination airport?
Not always. Rules vary by airport, so check your destination and any connecting airports, including your return journey.