Don't Trust the Number 23

At the check-in counter, a suitcase on the scale reads 24.3 kilograms. The traveler's face tightens. "Isn't the limit 23 kilos?" The agent answers evenly: "Our airline's limit is 20." Now there's a choice — repack on the spot, or pay the overage fee.

This scene repeats itself several times a day at the international check-in counters of Incheon or Gimpo. Travelers unzip suitcases to shift clothes and souvenirs into carry-on bags, or into a companion's luggage. Others stand calculating an unexpected surcharge, receipt in hand. For a few minutes, the counter turns into a small logistical scramble.

The trouble is that most travelers treat "23 kilograms" as a fixed rule. It is true that international economy-class checked baggage commonly hovers around 23 kilograms — but that number is not a universal standard, only a figure each airline sets independently. Low-cost carriers, in particular, often set lower weight limits, charging separately for anything over.

This variation comes down to how airlines structure their fares. Full-service carriers tend to bundle a baggage allowance into the ticket price. Low-cost carriers, by contrast, keep base fares low and sell baggage, seat selection, and meals as separate add-ons. So even on the same route, allowed weight and overage fees can differ sharply depending on the carrier.

The moment you book the ticket is the real time to check baggage weight — not the moment you pack.

Avoiding this problem is not complicated. It just requires checking fare rules and baggage details at the time of booking, as a habit.

1. Check the specific airline's checked baggage weight limit at the time of booking. Don't assume 23 kilograms just because it's an international flight.
2. If flying a low-cost carrier, confirm whether baggage is included in the base fare or must be purchased separately.
3. Before packing, weigh your bag at home. Adjusting at home is far easier than repacking at the airport.
4. If you expect to go over, buying extra baggage allowance online in advance is often cheaper than paying the airport counter rate.

Back at the check-in counter, the number on the scale isn't testing anyone. It simply reflects a question that was never asked in advance. The question to ask before packing isn't "how many kilos should I pack," but "what's this airline's limit."