One packing checklist for a traveler, organized by category — documents, electronics, toiletries, medications, clothing, and summer extras — built around the TSA's liquids rule and CDC guidance instead of guesswork.
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By Elena Marchetti, travel logistics writer. Last updated February 2025. Checked against current TSA screening rules and CDC travel-health guidance.
About the author: Elena Marchetti covers airport security policy and trip logistics for Fortrip, cross-checking every rule cited here against tsa.gov and CDC primary sources rather than secondary blog posts. Her earlier packing and travel-logistics reporting is archived on Fortrip's blog.
How this list is organized
This is one list of packing items, not four separate checklists split across keyword variants. Searches for a general packing list, a summer vacation version, and a carry-on-versus-checked breakdown all circle the same underlying question: what actually needs to go in the bag. Everything sits here in one place, broken into categories meant to be scanned the night before a flight.
The summer section and the carry-on/checked section are subsections of this same checklist, positioned where they matter rather than spun into separate posts. The order follows how packing actually happens: documents and money first, then electronics, then the TSA rules governing carry-ons, then medications, then clothing and comfort items, then trip-specific extras.
The starting point is the rule that governs a large share of packing decisions — the TSA's 3-1-1 liquids policy — with medication guidance checked against CDC recommendations.
Documents and money
Passport, visa printouts, and driver's license
One physical copy of hotel and flight confirmations, in case a phone dies or a screen won't load at a border checkpoint
Travel insurance policy number written down on paper as a backup to whatever's saved in an app
A backup payment card kept separate from your primary wallet, stored in a different bag or pocket
Small bills in the local currency for the first day, before you've found an ATM or a place that takes cards
If the trip involves multiple countries or visa deadlines that don't line up with your flight dates, running the itinerary through the itinerary validator before you pack catches document mismatches while there's still time to fix them.
Electronics and chargers
Phone charger, a portable battery pack, and a universal adapter matched to the destination country's outlets. Chargers get left behind for a mundane reason: they're usually still plugged into a wall somewhere in the house until the last minute, and a rushed morning is when they get skipped over.
Add headphones, an e-reader or camera if you use one regularly, and a spare charging cable, kept in the carry-on rather than the checked bag. If the charger you're using fails mid-trip, you don't want the backup checked through to a different city. For destinations where the outlet type isn't confirmed yet, the AI trip planner lists it alongside other country-specific details for each leg of a trip.
Toiletries and the TSA 3-1-1 rule
The rule itself
Carry-on liquids, gels, and aerosols must be in containers of 3.4 ounces (100 mL) or less, and every container has to fit into a single quart-size bag per passenger (Transportation Security Administration, 2025). Anything in a container larger than 3.4 oz has to go in checked baggage, even if the bottle itself isn't full.
TSA 3-1-1 element
Requirement
Container size
3.4 oz (100 mL) or less, per item
Total bag
One quart-size, resealable bag per passenger
Oversized liquids
Must go in checked baggage
Medications & infant nourishment
Exempt from the size cap, but must be declared separately
Duty-free liquids (international connections)
Typically allowed over 3.4 oz only if sealed by the retailer in a tamper-evident bag with a recent purchase receipt; specifics can vary by airport
Core toiletries that fit the rule: toothbrush, toothpaste, deodorant, sunscreen, and contact lens solution if you wear lenses. Sunscreen and toothbrushes are among the easiest things to set down mid-pack and forget on the bathroom counter, worth a second glance before the bag zips shut.
Medications and the exemption travelers miss
The declaration exemption
Medications and infant or child nourishment are exempt from the 3.4 oz container cap, but they still have to be declared separately at the screening checkpoint (Transportation Security Administration, 2025). Most travelers don't learn this until they're standing in line wondering whether a larger bottle of liquid medication is going to cause a problem.
Packing medications for international travel
Keep prescriptions in their original labeled containers rather than a pill organizer, and for international trips, carry a printed copy of the prescription itself — standard guidance from the CDC's travel health recommendations (Centers for Disease Control and Prevention, 2024). Pack at least one extra day's supply of any medication in the carry-on, so a delayed checked bag doesn't stall the trip.
Clothing, by trip length not by outfit count
Base the clothing list on how many days pass between access to laundry, not the total length of the trip. A ten-day trip with laundry available on day five packs like two five-day trips.
For a five-day stretch without laundry: one shirt or top per day, underwear for each day plus one spare, socks for each day plus two spares, one pair of pants or a skirt for every two to three days, and one dressier outfit set aside for a nicer dinner or an unplanned event. Shoes stay at two pairs for most trips — one worn on the plane, one packed — unless the itinerary specifically calls for hiking boots or dress shoes on top of that.
Include one layer for temperature swings, a packable jacket or a shawl, even for a warm-weather destination, since evenings, air conditioning, and altitude changes don't always match the daytime forecast. Pack one full change of clothes in the carry-on, separate from the checked bag, so a delay doesn't leave you without anything to wear on arrival.
Comfort items for the flight itself
A neck pillow, an eye mask, and earplugs or noise-canceling headphones make a real difference on overnight or long-haul segments. These are the items people regret leaving behind somewhere over an ocean, even though nothing forces you to pack them.
Pack an empty reusable water bottle to fill after the security checkpoint, since liquids brought through security are restricted and gate prices for bottled water are rarely worth it. Keep snacks that clear screening in an easy-to-reach side pocket rather than buried under clothing.
Summer vacation packing, specifically
A general packing list misses a few things a summer trip actually needs. After-sun lotion belongs alongside sunscreen. Pack a second swimsuit so there's always a dry one to change into, and a lightweight cover-up for the walk between the beach and lunch.
Bring a higher SPF sunscreen than whatever's in the year-round toiletry bag — midday beach exposure differs from walking around a city in spring. For coastal or wooded destinations, add insect repellent, and for regions without reliable air conditioning, a small portable fan is worth the space it takes up. If the destination is still undecided, Fortrip's climate and season guides cover which regions run hot, humid, or unpredictable during peak summer months.
Carry-on versus checked baggage
Item category
Carry-on
Checked
Medications
Always, original containers
Never as the only copy
One full change of clothes
Yes
No
Chargers and cables
Yes, at least one set
Spares only
Documents and money
Always
No
Full-size toiletries over 3.4 oz
No
Yes
Bulky shoes (hiking boots, formal shoes)
Optional
Yes, if space is tight
Duty-free liquids over 3.4 oz
Only if sealed with a recent receipt (see note below)
Yes, otherwise
Duty-free liquids on international connections
For international connections through the US, TSA's liquids rule allows duty-free liquids over 3.4 oz in carry-on only if the retailer has sealed the bottle in a transparent, tamper-evident bag along with a receipt showing a recent purchase, generally within about 48 hours (Transportation Security Administration, 2025). Exact enforcement can differ by airport and by the connecting airline's screening staff, so it's worth checking the purchase timestamp and keeping the receipt visible before boarding the connecting flight rather than assuming the window is identical everywhere.
If you're mapping out a multi-city or multi-country trip and want to see how baggage rules and layovers line up before you pack, the AI trip planner lays out the itinerary segment by segment, and the itinerary validator flags connection times tight enough to cause problems at security or customs.
A final walk-through before leaving the house
Recheck the quart-size bag against the 3-1-1 rule one more time before heading to the airport — it's one of the most common reasons bags get pulled aside at the checkpoint. Confirm medications and any infant nourishment are declared and easy to reach, not packed at the bottom under three layers of clothing.
Glance at the carry-on for three categories specifically: chargers, toiletries, and documents. These are among the easiest items to overlook and the hardest to replace quickly once you've already left. Fortrip's destination guides cover more of this planning process city by city, and pricing has the details on the planning tools themselves.
Frequently asked questions
What items are exempt from the 3-1-1 rule?
Medications and infant or child nourishment are exempt from the 3.4 oz container cap, but they still have to be declared separately at the screening checkpoint (TSA, 2025).
How big can a carry-on liquid container be?
Each container must hold 3.4 ounces (100 mL) or less, and all of a passenger's containers together must fit inside a single quart-size bag (TSA, 2025).
Can I bring duty-free liquids over 3.4 oz through a US connection?
Generally only if the bottle is sealed by the retailer in a tamper-evident bag and the receipt shows a recent purchase, typically within about 48 hours, though enforcement can vary by airport (TSA, 2025). Otherwise it needs to go in checked baggage.
Should medication go in checked baggage or carry-on?
Carry-on, in original labeled containers, with at least one extra day's supply in case checked baggage is delayed — guidance consistent with CDC recommendations for travelers (CDC, 2024).
How many outfits should I pack for a five-day trip without laundry access?
A reasonable baseline is one top per day, underwear for each day plus one spare, socks for each day plus two spares, pants or a skirt for every two to three days, and one dressier outfit held back for an unplanned dinner or event.
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Frequently asked questions
What items are exempt from the 3-1-1 rule?+
Medications and infant or child nourishment are exempt from the 3.4 oz container cap, but they still have to be declared separately at the screening checkpoint (TSA, 2025).
How big can a carry-on liquid container be?+
Each container must hold 3.4 ounces (100 mL) or less, and all of a passenger's containers together must fit inside a single quart-size bag (TSA, 2025).
Can I bring duty-free liquids over 3.4 oz through a US connection?+
Generally only if the bottle is sealed by the retailer in a tamper-evident bag and the receipt shows a recent purchase, typically within about 48 hours, though enforcement can vary by airport (TSA, 2025). Otherwise it needs to go in checked baggage.
Should medication go in checked baggage or carry-on?+
Carry-on, in original labeled containers, with at least one extra day's supply in case checked baggage is delayed — guidance consistent with CDC recommendations for travelers (CDC, 2024).
How many outfits should I pack for a five-day trip without laundry access?+
A reasonable baseline is one top per day, underwear for each day plus one spare, socks for each day plus two spares, pants or a skirt for every two to three days, and one dressier outfit held back for an unplanned dinner or event.
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