Photo by Alexander Schimmeck on UnsplashStart with your cabin class and both bags together. A suitcase that appears light enough on its own can exceed a combined allowance once a laptop bag is added. Size and weight need separate checks.
Read the allowance for your cabin
The Korean Air carry-on policy, checked September 21, 2026, gives Economy/Premium passengers one carry-on plus one personal item, with a combined limit of 10 kg. The personal item must fit under the seat and be within 40 × 30 × 15 cm. First/Prestige allows two carry-on bags with a total limit of 18 kg.
For the carry-on, the airline lists a sum of dimensions within 115 cm (45 in) or dimensions within 55 × 40 × 20 cm, including wheels and handles. These are published alternatives. Do not silently change “or” into “and.” Codeshares may use the operating airline’s allowance; country or airport restrictions can also differ.
Check shape and combined weight
- Pack both bags and measure the outside of each, including protrusions.
- Record the carry-on’s three dimensions and their sum. Check the personal item separately.
- Weigh each packed bag, then add the weights. Include items in pockets and the laptop bag.
- Compare against your cabin allowance and ask the airline about unusual shapes or a measurement near a boundary.
Size example: 22 × 14 × 9 inches converts to 55.88 × 35.56 × 22.86 cm, totalling 114.3 cm. That is below the published 115 cm sum, although two dimensions exceed the separately listed 55 × 40 × 20 cm box. The individual-side comparison alone does not justify saying this bag is forbidden. Record the measurements and confirm practical stowage for your flight if uncertain; the arithmetic is not a boarding guarantee.
Weight example: a 7.8 kg carry-on plus a 2.6 kg personal item totals 10.4 kg. On a 10 kg combined allowance that is 0.4 kg over. Moving the laptop between those two bags changes neither the total nor the problem. Reduce what you carry or check suitable items under your booking’s conditions.
Do not assume that a soft bag “usually passes,” that all 22-inch cases are the same size, or that buying a smaller case solves an overweight pair. Re-measure and reweigh after making a change.
Plan for storage and a connection
Korean Air notes that even compliant bags may be checked when cabin storage is unavailable. Keep documents accessible and ask staff about batteries before handing over a bag. For a partner-operated segment, save the operating carrier’s confirmation with your booking. Use the checked-baggage guide to check the allowance for items that cannot travel in the cabin.
Finish your bag checks
Use these temporary ticks as a reminder in this tab. Save actual dimensions and the airline’s allowance with your booking.
Other airline guides
- Southwest Airlines carry-on guide
- Frontier Airlines carry-on guide
- Air Canada carry-on guide
- JetBlue carry-on guide
- American Airlines carry-on guide
- United Airlines carry-on guide
- Delta Air Lines carry-on guide
Related pages on TripPack
- All eight airlines in one table — cabin bags, personal items and fare conditions side by side.
- Carry-on packing list — what to actually put in the bag once you know it fits.
- How to measure a carry-on bag — where to hold the tape.
- Baggage weight limits explained.