2026-10-02 · 8 min read
A scannable packing checklist broken down by trip length and traveler type — including the real TSA 3-1-1 liquids rule, a carry-on vs. checked table, and the duty-free exception TSA actually publishes.
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Figuring out what to pack for vacation gets easier once you stop treating every trip the same way. This checklist is organized by trip length and traveler type, because that's what actually changes what belongs in the bag — not a generic twenty-item template.
Written by Elena Cho, Fortrip's packing and logistics editor, who has covered TSA rule changes and carry-on policy shifts for the site since 2021. Published November 2025. Packing rules below are checked against current guidance from the Transportation Security Administration, last verified against tsa.gov in November 2025; this section gets re-checked every six months as TSA updates its published rules.
Skip the fourth "just in case" clothing option. It rarely gets worn.
The rule itself is simple and worth stating plainly, straight from TSA's own guidance:
On checked bag weight, there's no single federal rule to point to — only patterns that repeat across airline sites:
Confirm the actual limit on your airline's site before you pack, not after you're at the counter.
| Item | Carry-on | Checked |
|---|---|---|
| Liquids over 3.4 oz (100 mL) | No | Yes |
| Specialty gear (skis, dive equipment, climbing hardware) | Rarely fits cabin limits | Yes |
| Medications, baby formula, breast milk | Yes — exempt from the liquids cap | Not recommended |
| Backup charger, laptop, presentation outfit (business travel) | Yes | No |
| Duty-free liquids bought after security on a connecting flight | Only in a tamper-evident bag with a receipt under 48 hours old | Recommended by TSA instead |
If you're building a list with fit and sizing in mind rather than just function, our travel packing list for women covers that angle separately.
Does the TSA 3-1-1 rule apply to every flight, or just international connections? It applies to all flights departing U.S. airports, domestic and international alike.
Can I bring full-size toiletries if I check a bag instead of carrying on? Yes. The 3.4 oz limit only applies to carry-on items; checked bags have no liquid size restriction from TSA.
What's the checked baggage weight limit for international flights? It varies by airline and fare class. There's no single federal number, so check the carrier's published policy before packing.
What do I actually need for a 4-day trip versus two weeks? The core list stays nearly the same. The difference is laundry planning, not doubling every item.
Are medications and baby formula exempt from the liquids limit? Yes, but keep them separate for screening and be ready to explain if asked.
If I buy duty-free liquor after security, can I bring it on my connecting flight? Only in a sealed tamper-evident bag with a receipt under 48 hours old, and TSA still recommends checking it instead to avoid the risk of it being confiscated at a later checkpoint.
It applies to all flights departing U.S. airports, domestic and international alike.
Yes. The 3.4 oz limit only applies to carry-on items; checked bags have no liquid size restriction from TSA.
It varies by airline and fare class. There's no single federal number, so check the carrier's published policy before packing.
The core list stays nearly the same. The difference is laundry planning, not doubling every item.
Yes, but keep them separate for screening and be ready to explain if asked.
Only in a sealed tamper-evident bag with a receipt under 48 hours old, and TSA still recommends checking it instead to avoid the risk of it being confiscated at a later checkpoint.

Sketch a brief. We come back with an itinerary that reads like a recommendation, not a checklist — and tell you what we’d change about it.
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