Three years ago, I stood in the Lisbon airport watching my checked bag disappear into a black hole of “delayed 48 hours” while I wore the same sweaty shirt for two days straight. That was the moment I swore off checked luggage forever. Fast forward to this spring, when I spent 21 days bouncing between Portugal, Spain, and Morocco with nothing but a 40-liter backpack. No lost luggage, no $75 checked bag fees each way, no waiting at baggage claim. Just me, my pack, and a lot fewer headaches. Here’s exactly how I did it, what it cost, and what I’d change for next time.
Why I Ditched Checked Bags for Good
The math sold me before the lifestyle did. On a round-trip flight from Chicago to Lisbon in 2026, checking one bag runs anywhere from $35 to $75 each way depending on the airline, so that’s up to $150 just to babysit a suitcase that might not even show up on time. Multiply that across a multi-city itinerary with budget carriers like Ryanair or Vueling (where checked bags can cost $60+ per segment), and you’re easily out $300-400 for the privilege of stress. I’d rather put that money toward a really good dinner in Porto or an extra night in Marrakech.
Beyond the money, there’s the freedom factor. When my train from Madrid to Barcelona was cancelled last-minute, I hopped a bus without a second thought. Try doing that gracefully with a 50-pound checked bag and a garment bag over your shoulder.
The Gear That Actually Made This Possible
I won’t pretend gear doesn’t matter, because it does. I use the Osprey Fairview 40 (around $220), which fits airline carry-on sizers for basically every carrier I’ve flown, including the notoriously strict European budget airlines. Inside, I rely on Eagle Creek packing cubes (a set runs about $35-45) to compress clothes and keep things organized so I’m not unpacking my entire bag to find one sock at airport security.
A few other gear notes worth the investment: a packable rain jacket ($60-90 depending on brand), a microfiber travel towel ($15), and a universal power adapter with USB-C ports ($25). I also bring a small toiletry bag with solid shampoo bars and a 3-1-1 compliant clear pouch, because liquids are still the number one reason people get pulled aside at TSA.
My Exact 21-Day Packing List
Here’s the actual list that got me through three weeks across three countries and four climate zones (rainy Lisbon, hot Seville, chilly Madrid nights, and desert-warm Marrakech days):
5 t-shirts, 2 long-sleeve shirts, 1 lightweight sweater, 3 bottoms (one being convertible hiking pants), 7 pairs of underwear, 3 pairs of socks (merino wool dries fast), 1 pair of walking shoes, 1 pair of sandals, a swimsuit, and a packable down jacket for cooler evenings. That’s it. I did laundry twice during the trip, which brings me to my next point.
Booking Smart to Support a Light Travel Style
Packing light only works if your bookings work with you, not against you. I always check the baggage policy before booking flights, and I use Booking.com to find accommodations that specifically mention laundry facilities or nearby laundromats in the listing description. On this trip, I paid around $89 a night for a well-reviewed apartment in Lisbon’s Alfama district that had an in-unit washer, which saved me from packing more than a week’s worth of clothes.
For day trips, I book through Viator rather than showing up and negotiating with street vendors. A half-day Sintra palace tour ran me $68, and the confirmation email made it easy to know exactly what to expect (and what to wear, which matters when your wardrobe is limited).
Renting a car for the Andalusia leg of the trip, I used Discover Cars to compare rental agencies in Seville, landing a compact manual for $27 a day, taxes included, which was nearly $15 cheaper than booking directly through the rental company’s own site. A smaller bag also means you’re not fighting to cram luggage into a compact European trunk.
I also never travel without travel insurance now, especially after a friend broke her ankle in Marrakech last year with zero coverage. I use SafetyWing’s Nomad Insurance, which runs about $45 a month and covers international medical emergencies, which feels like cheap peace of mind for the price of a nice dinner.
Laundry, Layering, and Other Survival Tricks
The real secret to carry-on-only travel for three weeks isn’t some genius folding technique, it’s accepting that you’ll do laundry. I hand-washed smaller items in hotel sinks using a small bottle of Sink Suds ($8) and used actual laundromats twice, spending about $6-10 per load in Seville and Marrakech. Layering also does a lot of heavy lifting; that packable down jacket worked over a t-shirt in Madrid’s chilly evenings and packed down to the size of a grapefruit when I didn’t need it in Marrakech’s daytime heat.
One mistake I made early on: packing too many “just in case” items, like a second pair of jeans I wore exactly zero times. Now I follow a rule where if I haven’t worn something in the first week, it gets donated or shipped home before the trip continues.
Bottom Line
Packing light for a three-week trip in 2026 isn’t about deprivation, it’s about intention. Between skipping $150+ in checked bag fees, booking smarter through platforms like Booking.com, Viator, and Discover Cars, and budgeting around $45 a month for solid travel insurance through SafetyWing, I spent less, moved faster, and honestly enjoyed the trip more without babysitting a giant suitcase. My total gear investment (bag, cubes, jacket, toiletries) was around $400, which paid for itself within one trip in saved baggage fees alone. If you’re on the fence about going carry-on only for a long trip, my honest advice is just try it once. You’ll probably never check a bag again.