Overweight checked bags: compare the complete charge

The price of an overweight checked bag depends on more than its weight. Identify the operating carrier, ticket, route, bag number and dimensions before comparing options. There is no worldwide 23 kg allowance, 32 kg acceptance ceiling or fixed price per extra kilogram.

Build a comparable quote

Quote the same flight, date, currency, one-way or return basis and purchase stage for every option. Confirm taxes and whether fees stack. Paying more cannot override an acceptance ceiling or dangerous-goods restriction.

Southwest mainland example

Southwest’s current U.S. Mainland table for travel booked and ticketed and/or changed on or after 9 April 2026 lists a $45 first standard checked bag for Basic, Choice and Choice Preferred without an applicable exemption. Overweight 51–70 lb adds $100; 71–100 lb adds $200. These are normally one-way charges.

For an ordinary-size first bag weighing 65 lb on Basic, without an exemption, that stated combination is $45 + $100 = $145 one way. This is an illustration of that published scope, not a quote for every Southwest trip. Earlier booking, Hawaii, extra pieces, special equipment and applicable benefits need their own table. Southwest states one combined $200 overweight/oversize surcharge under its mainland conditions; do not automatically add two such surcharges.

Check the official fee table and your booking before paying. A free standard bag benefit does not necessarily remove a weight or size surcharge.

Compare solutions before arrival

Weigh every bag with the final contents. Repacking into another included bag may work only if each bag and the total entitlement remain valid. Buying another checked piece can create a different total cost; compare the complete quotes rather than assuming it is cheaper. Shipping requires a confirmed service, delivery time, import conditions and price.

When moving items between cabin and hold, check transport restrictions first. Spare lithium batteries and powerbanks stay protected in the cabin under FAA guidance. Essential documents and necessary medication should remain accessible; medical storage and import requirements need separate confirmation.

At the counter

Ask which weight, size or piece band applies and what alternatives remain before the acceptance deadline. Keep the payment and bag-tag record. No negotiation success rate, automatic tolerance or airport purchase discount is established. The cabin checker does not calculate a checked-bag price; the excess-baggage options guide helps organize the comparison.

Official sources and scope

• Southwest: mainland fee bands and combined charges
• IATA: airline-specific baggage and stowage
• FAA: spare lithium batteries and gate handover
• CDC: medicine documents and storage