Airlines like Ryanair, EasyJet, and Spirit are currently charging upwards of $70 (or €60) per checked bag each way. If you are hopping between countries on a 7-day trip, checking a bag can quickly double the cost of your actual flight.

calculateThe Capsule Wardrobe Math
You don't need an outfit for every day. You need a mathematically sound capsule wardrobe. We use the 5-4-3-2-1 Rule for a 7-day trip:

- 5x Tops (mix of t-shirts and one button-down)
- 4x Underwear/Socks (wash in the sink mid-trip)
- 3x Bottoms (1 pair of jeans, 1 short, 1 comfortable pant)
- 2x Shoes (1 worn on the plane, 1 packed)
- 1x Jacket/Outerwear (always wear this on the plane!)
By sticking strictly to two complementary colors (like Navy/Grey or Black/Olive), these items yield over 30 unique outfit combinations.
compressVacuum Bags vs. Packing Cubes
A lot of amateur packers buy vacuum compression bags thinking they've hacked the system. This is a trap.

Vacuum bags reduce volume, allowing you to stuff 20kg of clothing into a 40L backpack. However, budget airlines have strict 10kg weight limits for carry-ons. If your bag looks tiny but weighs 15kg, they will force you to check it at the gate for a massive penalty fee.
Editor's Tip: Use standard packing cubes instead. They naturally restrict how much you can pack, acting as a physical barrier to overpacking, ensuring you stay under the 10kg weight limit.
savingsSave $150 on Bag Fees
To completely avoid fees, your bag must fit the "Personal Item" sizer (usually 40 x 20 x 25 cm for Ryanair, or 18 x 14 x 8 inches in the US). Hard-shell suitcases rarely fit this. You must use a soft-shell travel backpack.

When you approach the gate agent, wear your bulky jacket, stuff your pockets with your heavy electronics (power bank, chargers), and your soft backpack will slide right into the sizer without an issue.