The Real Rules of Carry-On Luggage
Airlines make billions in baggage fees every year. The rules are designed to be confusing, with "Personal Items," "Carry-Ons," and "Checked Bags" all having different weight and size limits depending on your ticket class and destination. Our checker helps you avoid the dreaded "gate check" fee.
Personal Item vs. Carry-On
- Personal Item (Free): Must fit under the seat in front of you. Typical max dimensions: 18 x 14 x 8 inches. Think backpacks, laptop bags, or large purses.
- Carry-On (Often Paid): Must fit in the overhead bin. Typical max dimensions: 22 x 14 x 9 inches. Think small rolling suitcases or duffel bags.
⚠️ Budget airlines (Spirit, Frontier, Ryanair) often CHARGE for Carry-Ons and only allow a Personal Item for free.
The "Linear Inches" Rule
Some airlines don't list L x W x H. Instead, they give a "Linear Inch" limit (usually 45 inches or 115 cm).
If your bag is oddly shaped (like a garment bag), as long as the total sum of its sides is under 45 inches, it *usually* flies.
Softshell vs. Hardshell: What Fits Best?
The type of luggage you choose affects whether you'll pass the sizer test.
| Type | Pros | Cons |
|---|---|---|
| Softshell (Fabric) | Squishable. Can be forced into tight overhead bins or sizers. | Less protection for fragile items. Can bulge if overpacked (taking it over limits). |
| Hardshell (Polycarb) | Maximum protection. Waterproof. Sleek look. | Zero give. If it's 1cm too big for the sizer, it won't fit. Period. |
Wheels & Handles Count!
The most common mistake travelers make is measuring the body of the suitcase but ignoring the wheels and the handle. Airlines measure from the floor up. If your wheels stick out 2 inches, they count against your length limit. Always engage the telescoping handle fully down before measuring.