How your answer is checked

1. Compare the measurements

We order the bag and the airline box from longest to shortest side, then compare each side. This tests rectangular fit independently of how a manufacturer labels height, width or depth. A known exceedance is too large. A combined-size limit alone can prove an exceedance, but cannot prove that a bag fits a rectangular sizer.

Published measurements are the starting point. Use the packed-size editor for bulging pockets or other changes. Wheels and handles are only described as included when the recorded source establishes that fact; silence stays unknown.

2. Keep close clearance separate from an exceedance

A bag within the published limits is marked close when the smallest clearance is 1.5 cm or less. Zero clearance means exactly at the recorded limit. A bag over a limit is too large, even by a small amount. The strict candidate lists exclude close-clearance bags.

Measurements are stored in centimetres without rounding conversions for the fit calculation. Displayed centimetres and inches are rounded to one decimal place. Rounded labels do not decide a borderline result.

Optional flexible-bag and planning-margin controls describe your assumptions. Flexibility is not an airline concession. Published-size results remain separate from a compression scenario; measure the fully packed bag before relying on it.

3. Resolve the policy for your flight

We use the operating airline and the applicable published policy branches. Fare, route, aircraft, cabin class, travel date, ticket purchase date and ticket issue date are separate inputs where the recorded policy requires them. Missing context is not guessed. Physical limits shared by all viable policies can still be shown while ticket allowance remains unresolved.

“Included” requires supporting structured policy data. A summary of fare rules is not a substitute for a trip-specific answer. Weight and multiple-piece conditions must also be checked; an empty bag weight is not its packed weight.

Evidence and catalogue coverage

Source links and recorded check dates appear with the result and on sourced detail pages. A check date records the evidence review; it is not a promise that an airline has made no later change. Follow the current official policy before departure. A review older than 90 days gets a reminder to recheck the official source; this is an attention flag, not evidence that the policy has changed.

Incomplete measurements are excluded from executable configurations. Missing capacity or empty weight stays unknown and can be filtered in the catalogue. Similar model names may describe different generations or materials; we do not merge them without evidence.

The sitemap lists published, indexable pages. Some catalogue records are checkable without a separate editorial detail page. Brand hubs expose the full catalogue; only records with a registered detail page receive a detail link. This publication policy was reviewed on September 6, 2026.

Saved trips and shared links

Saved trips stay in this browser. Shared links restore inputs and run against current BagCheck data, so a later policy correction can change the answer. An explicit shared URL takes precedence over locally saved state.

What the answer does not guarantee

Staff decisions, actual sizers, packed bulge and unrecorded aircraft exceptions can affect acceptance. BagCheck currently checks cabin and personal-item baggage, not checked-bag fees.