Southwest Airlines (WN) Baggage Allowance Calculator

Southwest Airlines permits one carry-on bag with no strict weight limit with maximum dimensions of 61×41×25 cm (length × width × height). Weight is not strictly limited on Southwest Airlines, but the bag must fit the sizer at the gate — over-stuffed roller bags are commonly gate-checked.

A small personal item (purse, small backpack, laptop bag) is also permitted on Southwest Airlines provided it fits under the seat in front of you.

The checked allowance on Southwest Airlines is 23 kg per standard bag, and the $45 fee doubles at the airport counter. Extra checked bags on Southwest Airlines price at $55 USD each online; at the counter, expect 40–60% more for the identical bag.

Bulky items like strollers, car seats and wheelchairs travel free in the hold on Southwest Airlines, and overweight charges kick in above 23 kg at $10 USD per additional kilogram.

Southwest Airlines charges $55 USD per additional checked bag beyond the first, and $10 USD per kilogram over the 23 kg limit. Compare strategies before paying: a second 18 kg bag at $55 often beats $10/kg overweight on one heavy case — the calculator tests both configurations for Southwest Airlines (WN).

The cheapest fixes are free on Southwest Airlines too: distribute weight across bags, wear the heavy coat, pocket the chargers. Pre-booking Southwest Airlines extra bags online locks the lowest rate.

Sports gear on Southwest Airlines (WN) travels as standard checked baggage within the weight allowance for the standard $45 bag fee. Musical instruments on Southwest Airlines: small instruments (violin, flute) can travel as carry-on if they fit the sizer; larger ones (cello, guitar) usually require a separate seat or checked handling in a hard case.

Strollers, car seats and mobility devices (wheelchairs, scooters) travel free on Southwest Airlines with priority handling — gate-check a stroller and it returns at the aircraft door.