Most checked-bag size tables use length plus width plus height, measured outside including wheels and handles. A bag above the ordinary limit may incur a fee or be refused.
Why the answer can change
A combined weight-and-size excess is airline specific: some add surcharges, some use a higher surcharge, and some publish a combined row. Check the correct rule before summing.
Check your own trip
- Start with the airline flying each leg, the fare you bought, and the dates on your ticket.
- Count bags for each traveler. Measure the packed outside of every bag, then find both the standard limit and the largest bag the airline will accept.
- Look up the bag fee, extra-piece fee, and any weight or size charge separately. If one amount is missing, you don’t have a complete total yet.
- Check the final price in the airline’s booking or check-in flow, and save the receipt.
Before you pay
Use the size and fee tools to put your bag details in one place. If we can’t confirm the full cost, they’ll tell you what still needs an airline quote.
For a worked example, read Why Your Bag Weight Alone Cannot Tell You the Total Fee.
Where this gets tricky
A 28 × 18 × 12 inch suitcase totals 58 linear inches; a 30 × 20 × 14 inch bag totals 64. The marketed height alone cannot answer the question.
Here’s what to check: Measure wheels and handles, then ask whether the carrier stacks size with weight or uses a combined charge.
What the numbers can tell you
Route: U.S. domestic · Fare: Main Cabin · Ticket issued: 2026-10-20 · Travel date: 2026-11-15 · Bag number: 1 · Weight: 55 lb · Size: 64 linear in
The listed charges add up to 145 USD in this example. Your checkout may differ. The larger $100 weight surcharge applies; the $30 size surcharge is not added again.
Route: U.S. domestic · Fare: eligible standard Economy · Bag number: 1 · Weight: 55 lb · Size: 66 linear in
The listed charges add up to 345 USD in this example. Your checkout may differ. The weight and size charges add to the base. Do not reuse AA’s maximum-of-two rule.
Before you rely on a price
| Check | Why it can change the answer |
|---|---|
| Ticket and fare | A policy can depend on when a ticket was issued or changed, and on the exact fare brand. |
| Bag and owner | Piece number, three outside dimensions and the traveler’s own benefits can alter the charge. |
| Official confirmation | The airline checkout or service desk decides final acceptance, taxes and payment. |
Official sources and evidence
- American Airlines: Oversize and overweight bags (official page read; checked 2026-10-31)
- Delta Air Lines: Excess, overweight and oversized baggage (official page read; checked 2026-10-31)