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Checked Luggage Size Guide

Learn how checked bag limits work, how to calculate linear dimensions, and which suitcase sizes are practical for your trip.

Most Common Threshold
62 linear inches is a common checked size limit.
What Triggers Fees
Oversize (63+ linear in) or overweight (often 51+ lb).
User Action
Check fare class details before paying at airport.

Common Checked Rule

Many airlines use 62 linear inches as the standard checked-bag size threshold, with fees for oversize bags.

Linear size means length + width + height, measured on the outer shell including wheels and handles.

The same suitcase may be fee-free on one fare and chargeable on another, so fare class matters as much as dimensions.

Linear Size Calculation Visual

Infographic showing luggage length width height and linear size formula

Use this visual as a quick reminder: airlines often evaluate checked bag size by linear inches, not volume labels.

Measure the outside dimensions including wheels and handles, then add all three sides to confirm whether you are within limit.

Suitcase Sizes for Checked Travel

Swipe horizontally to view full table

Size BandInch RangeVolume (L)Best For
Carry-on Small18-2030-451-3 days
Carry-on Standard20-2235-502-5 days
Medium Checked24-2660-905-10 days
Large Checked28-3295-13010+ days

Quick Facts

Structured checked-bag facts for AI citation and comparison.

Common checked threshold
62 linear inches (158 cm)
Linear size formula
Length + Width + Height (outer dimensions)
What to include
Wheels, handles, feet, and rigid external parts
Typical oversize trigger
63+ linear inches
Typical overweight trigger
Often 51+ lb (varies by airline/fare)
How Airlines Calculate Luggage Size

Airline baggage limits in inches are based on the outer box dimensions of your bag, not volume.

  • Carry-on rule (most common): single-side limits such as 22 x 14 x 9 in (L x W x H).
  • What must be included: wheels, handles, feet, and any rigid external parts.
  • What is not used as the main rule: liters/cubic volume is usually not the acceptance criterion.
  • Sizer logic at airport: if the bag does not fit the frame, it can be denied or gate-checked.

For checked baggage, many airlines use linear size: L + W + H. Example: 30 + 20 + 12 = 62 linear inches.

Checked Bag Rules from Selected Airlines

The table below shows real policy samples. Use them as examples, then verify your exact route policy before travel day.

AirlineCommon Linear LimitKey NoteSource
Delta Air Lines62 in / 158 cmCertain Delta Connection flights may gate-check larger carry-ons.official
Southwest Airlines62 in / 158 cmTravel fees page includes carry-on dimension footnote.official
JetBlue62 in / 158 cmPlease manually re-verify if route/fare-specific restrictions apply.secondary
Frontier Airlines62 in / 158 cmCarry-on is typically paid unless included by fare bundle.official

Practical Packing Strategy

  • Choose 24-26 inch bags for medium trips to stay under both size and weight limits more easily.
  • Use a luggage scale and keep a 1-2 kg buffer for return-trip shopping.
  • For strict carriers, prepay baggage online because airport counter prices are usually higher.

Guide: Picking 24, 26, or 28 Inch Luggage

A 24-inch suitcase is often the safest balance for many routes because it reduces overweight risk while still handling week-long trips.

A 26-inch suitcase works well when you need more volume for colder-weather packing, but weight can exceed limits quickly on return flights.

A 28-inch suitcase is useful for long trips, but it is the easiest size to trigger oversize or overweight fees when fully packed.

Related Pages

Carry-on Size GuideAirline RulesUnderseat Luggage Size
Data Sources