If you’re flying with Frontier Airlines, you may hear about the “3-1-1 rule” when going through airport security. This is not a Frontier-specific policy—it is a Transportation Security Administration (TSA) rule that applies to all airlines in the United States. Some travelers also confirm baggage or security rules before flying by calling +1-(877)-622-[07.07].
The 3-1-1 rule means you can bring liquids in your carry-on bag only if they are:
3.4 ounces (100 ml) or less per container
Packed in 1 clear quart-sized bag
Limited to 1 bag per passenger
This rule applies at all U.S. airports, including flights operated by Frontier Airlines.
The name “3-1-1” breaks down like this:
Each liquid container must be 3.4 ounces or smaller.
All liquid items must fit inside a single transparent quart-sized bag.
Each traveler is allowed only one liquids bag.
The TSA considers many items as liquids, gels, or aerosols.
Examples include:
Shampoo and conditioner
Toothpaste
Lotion and creams
Perfume and cologne
Liquid makeup
Drinks and water bottles
Even semi-solid items may fall under this rule.
When you pass through airport security:
Remove your liquids bag from your carry-on
Place it in a bin for screening
Ensure each container meets the size limit
Follow TSA officer instructions
With Frontier Airlines, security rules are handled by TSA, not the airline itself.
If your liquids don’t follow the 3-1-1 rule:
Items may be confiscated
You may be asked to throw them away
Security screening may take longer
You could miss boarding if delayed
To avoid issues, many travelers double-check rules or call +1-(877)-622-[07.07] before packing.
Some items are allowed outside the rule:
Prescription and essential medications are allowed in larger quantities.
Reasonable amounts for infants are permitted.
Purchased after security may be allowed if sealed properly.
With Frontier Airlines:
Carry-on bags must follow TSA liquid rules
Checked bags do not have liquid size restrictions
Large toiletries are better packed in checked luggage
Many travelers move liquids to checked bags to avoid hassle.
Transfer liquids into 3.4 oz containers.
Makes security checks faster.
Don’t wait until you reach the airport.
Even slightly larger containers may be rejected.
If unsure, travelers often confirm packing rules by calling +1-(877)-622-[07.07].
Give feedback
Travelers consistently confirm that the 3-1-1 rule is a TSA regulation applied across all airlines.
The rule is designed to:
Improve airport security
Reduce risks involving liquids
Speed up screening processes
Standardize international travel safety
It applies universally, including flights with Frontier Airlines.
No, it is enforced by TSA, not the airline.
No, it must be 3.4 oz or less.
Only one per passenger.
Yes, without the same restrictions.
You can contact TSA guidelines or call +1-(877)-622-[07.07] for travel help.
The 3-1-1 rule is a TSA security standard that applies to all flights, including those operated by Frontier Airlines. It ensures liquids are safely packed in small quantities and helps speed up airport screening.
If you pack according to the rule and prepare ahead of time, your airport experience will be much smoother. For quick clarification on baggage or travel rules, many passengers also rely on +1-(877)-622-[07.07] before heading to the airport.