A mosquito season packing checklist only earns its name if it's organised by timing, not by category. Most mosquito-packing advice gets written the week you're already at your destination, which is exactly too late for the two things that actually need lead time: talking to a pharmacist about your specific trip, and treating clothing with permethrin, which needs to dry before you wear it. Here's the same core CDC guidance, organised by when you actually need to act on it, from the week before you leave to the evening you land.
Before you leave: the two things that need lead time
Start with the boring, load-bearing step. If you're headed somewhere mosquito-borne illness is a genuine concern, that's a conversation for your doctor or pharmacist, not a packing list, and it's worth having before you've booked the last of your plans rather than the night before you fly.
The second lead-time item is treated clothing. CDC recommends wearing "clothing and gear treated with permethrin," and notes that "permethrin- treated clothing provides protection after multiple washings," which is exactly why it's a pre-trip job rather than a last-minute one: buy it pre-treated, or apply permethrin yourself and let it dry, days before you pack it, not the morning you leave.
While you're still near a full pharmacy shelf is also the easiest time to pick a repellent with a real EPA registration, since CDC's own recommendation is to "use proven EPA-registered insect repellents" containing DEET, picaridin, IR3535, oil of lemon eucalyptus, PMD or 2-undecanone. Airport shops and unfamiliar destinations are a worse place to be choosing between unfamiliar brands for the first time.
It's also worth a quick look at where you're staying before you go, not just what you're bringing. CDC's standing advice includes using "screens on windows and doors" and repairing any holes in them, so if you have any say in the booking (a room with working screens or air conditioning versus one without), that choice does some of the prevention work for you before you've even unpacked. It's a smaller decision than the ones above, but it's one you can only really make in advance, which is why it belongs on this list and not on the evening routine below.
What actually fits in your carry-on
If you're flying, your repellent, and anything else liquid, has to clear airport security first. TSA's rule is a flat one: containers must be "3.4 ounces (100 milliliters) or less per item," placed together in a clear quart-sized bag for screening. Most international airports run the same 100ml limit, so it's worth checking bottle sizes before you leave rather than at the security line, especially for a spray or lotion repellent, which tends to come in larger everyday sizes than that. If your usual bottle is bigger, decant into a smaller labelled container, or buy travel-sized once you clear security if your destination reliably stocks EPA-registered brands (many places outside the US don't, which is its own argument for sorting this at home).
Your mosquito season packing checklist: the one list worth pinning to your suitcase
Everything above, compressed:
- EPA-registered repellent, travel-sized (100ml/3.4oz or under for carry-on)
- Permethrin-treated clothing, treated and dried before you pack it
- Loose, long-sleeved layers for dawn and dusk
- A doctor or pharmacist's specific advice for your destination, written down somewhere you'll actually check it
In transit and once you land
Reapplication is the part people forget once the trip actually starts. CDC's active-ingredient list doesn't come with a humidity adjustment, so the practical rule is to reapply on the earlier side of your product's stated window once you're somewhere hot and sweating more than usual, rather than waiting for the label's upper limit. It's also worth building your evening routine around when mosquitoes are actually active rather than around your own schedule. For Aedes aegypti specifically, the mosquito behind dengue, Zika and chikungunya, CDC's Yellow Book states its "peak biting activity... is after sunrise (dawn) and at sunset (dusk)," so the window right before dinner is often exactly the window worth reapplying in, not an hour later.
Sunscreen and repellent, in the right order
If your day involves both sun and mosquitoes, which most travel does, the order you apply them in matters more than most people realise. NPIC's insect repellents fact sheet is specific about this: "the CDC does not recommend products that have both sunscreen and an insect repellent," partly because sunscreen typically needs reapplying far more often than repellent does, and combined products make people reapply both less than they should. The recommended sequence instead is sunscreen first, "letting it dry, and then applying an insect repellent over the sunscreen." Simple enough to remember once, easy to get backwards if you're rushing out the door.
What you can leave at home
Skip anything marketed as a combined sunscreen-and-repellent, for the reason above: you'll end up under-applying one of the two. Skip relying on citronella candles or wearable diffusers as your only protection outdoors; they're a pleasant addition to a table, not a substitute for anything on your skin or clothing. And skip packing a full-size bottle of anything if a travel size exists, since a lost or confiscated full bottle at security is a worse start to a trip than a smaller one that clears easily.
Where a daily moisturiser earns its spot in the bag
If you're already packing a daily face and body cream, a scented one built around a botanical aromatic blend isn't a bad thing to have alongside the rest of this list, purely as skincare rather than as a repellent replacement. Misaj, a skincare brand formulated and produced in France, makes Glow Protect, which happens to come in a 100 ml tube, and that clears the same 100ml carry-on limit as your repellent, though that's a useful packing coincidence rather than a reason to use the two products interchangeably. One is a moisturiser with a pleasant scent profile; the other, chosen from the CDC's registered-actives list, is the thing actually doing the mosquito-prevention work on this list.
Frequently asked questions
Can I bring mosquito repellent in my carry-on?
Yes, as long as it's in a container of 3.4 ounces (100 millilitres) or less, per TSA's liquids rule, packed with your other liquids in a clear quart-sized bag for screening. Most international airports use the same 100ml limit.
Should I apply permethrin to my clothes before or after packing?
Before. Apply permethrin to clothing, or buy it pre-treated, several days ahead of your trip so it has time to dry properly, then pack it as normal. CDC notes that permethrin-treated clothing "provides protection after multiple washings," so it's a one-time step rather than something you do at your destination.
Should I put on sunscreen or repellent first?
Sunscreen first. NPIC's guidance, drawn from CDC recommendations, is to apply sunscreen, let it dry, and then apply insect repellent on top. CDC does not recommend combined sunscreen-and-repellent products, largely because the two need reapplying on different schedules.
For how the botanical options actually break down, see botanical mosquito repellent ingredients, explained, and for the DEET safety question that comes up on any trip, see is DEET safe? A skincare-first look at mosquito repellent ingredients.
Sources (fetched 2026-09-05)
- TSA, Liquids Rule (the 3.4 oz / 100 ml container limit and quart-sized bag requirement for carry-on liquids). https://www.tsa.gov/travel/security-screening/liquids-rule
- CDC, Prevent Mosquito Bites (EPA-registered active-ingredient list, permethrin-treated clothing and its multiple-wash durability; page last reviewed August 28, 2024). https://www.cdc.gov/mosquitoes/mosquito-bites/prevent-mosquito-bites.html
- CDC Yellow Book, Mosquitoes, Ticks, and Other Arthropods (Aedes aegypti peak biting activity at dawn and dusk; page last updated April 23, 2025). https://www.cdc.gov/yellow-book/hcp/environmental-hazards-risks/mosquitoes-ticks-and-other-arthropods.html
- NPIC, Insect Repellents Fact Sheet ("the CDC does not recommend products that have both sunscreen and an insect repellent"; the sunscreen-first, repellent-second application order). https://npic.orst.edu/factsheets/repellents.html
- misajskin.com, Glow Protect product page (product size, as listed 2026-09-05). https://misajskin.com/products/glow-protect