Why Carry-On Only Wins Short Trips
For 2–3 night trips, a carry-on eliminates baggage claim waits and lets you head straight to your hotel. On low-cost carriers, it also saves you the $30–60 checked-bag fee that often costs more than the ticket upgrade.
What to Check Before Buying
1. Total linear dimensions ≤ 115 cm Korean Air, Asiana, Jeju Air, and T'way all use the 55 × 40 × 20 cm standard — measured including wheels and handle. Ads claiming "55 cm interior" are misleading, so always check external dimensions.
2. Weight limit 7–10 kg Legacy carriers allow up to 10 kg, LCCs often cap at 7 kg. An empty case at 3 kg leaves only 4 kg for contents under the 7 kg cap. Aim for a shell weight under 2.5 kg.
3. Wheels — spinner vs. inline Four-wheel spinners glide in airports but rattle on European cobblestones. Japan's subway stairs? Look for double-wheel spinners with sealed bearings.
4. Shell — hard vs. soft Polycarbonate hard shells resist impact and water, but weigh slightly more. Soft nylon is lighter with external pockets but can tear. For a first carry-on, go polycarbonate hardshell.
Picks by Price Range
Airline Carry-On Limits at a Glance
| Airline | Linear | Weight |
|---|---|---|
| Korean Air | 115 cm | 10 kg |
| Asiana | 115 cm | 10 kg |
| Jeju Air | 115 cm | 10 kg |
| T'way / Jin Air | 115 cm | 10 kg |
| AirAsia | 115 cm | 7 kg |
| VietJet | 115 cm | 7 kg |
Routes to Southeast Asia on LCCs often enforce the 7 kg cap strictly — pack light and pick a case under 2.5 kg empty.
FAQ
Q. 20 inch or 22 inch? Go 20" for 2–3 nights, 22" for 4+ nights or winter clothing. Some 22" models exceed the 115 cm limit on Asiana and LCCs, so verify the manufacturer's external dimensions before buying.
Q. Hardshell vs. softshell — which lasts longer? Hard polycarbonate resists puncture and water best. Soft shells are lighter and repairable when torn. Frequent flyers should pick polycarbonate hardshell.
Q. Why does empty weight matter? On a 7 kg LCC cap, a 3.5 kg case leaves only 3.5 kg for contents. Under-2.5-kg models nearly double your usable capacity.
Destination-Specific Picks
- Japan & Taiwan city trips (2–4 nights): 20" polycarbonate hardshell
- SE Asia resorts (4–7 nights): 22" expandable + swimwear-heavy packing
- Europe long trips (7+ nights): Pair with a separate 28" checked case
See our Japan travel guides and Southeast Asia destinations for destination-specific packing tips.
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