REVENUE

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

REVENUE

REVENUE

Passenger Revenues

The Company’s contracts with its Customers primarily consist of its tickets sold, which are initially deferred as Air traffic liability. Passenger revenue associated with tickets is recognized when the performance obligation to the Customer is satisfied, which is primarily when travel is provided.

Revenue is categorized by revenue source as the Company believes it best depicts the nature, amount, timing, and uncertainty of revenue and cash flow. The following table provides the components of Passenger revenue recognized for the years ended December 31, 2023, 2022, and 2021:

	Year ended December 31,
(in millions)	2023		2022		2021
Passenger non-loyalty	$	19,073	$	17,645	$	11,377
Passenger loyalty - air transportation	3,639		3,028		2,136
Passenger ancillary sold separately	925		735		553
Total passenger revenues	$	23,637	$	21,408	$	14,066

Passenger non-loyalty includes all revenues recognized from Passengers for flights purchased primarily with cash or credit card. All Customers purchasing a ticket on Southwest Airlines are generally able to check up to two bags at no extra charge (with certain exceptions as stated in the Company's published Contract of Carriage), and the Company also does not charge a fee for a Customer to make a change to their flight after initial purchase, although fare differences may apply. Passenger loyalty - air transportation primarily consists of the revenue associated with award flights taken by loyalty program members upon redemption of loyalty points. Passenger ancillary sold separately includes any revenue associated with ancillary fees charged separately, such as in-flight purchases, EarlyBird Check-In®, and Upgraded Boarding.

In order to determine the value of each loyalty point, certain assumptions must be made at the time of measurement, which include the following:

•Allocation of Passenger Revenue - Revenues from Passengers, related to travel, who also earn Rapid Rewards Points have been allocated between flight (recognized as revenue when transportation is provided) and Rapid Rewards Points (deferred until points are redeemed) based on each obligation’s relative standalone selling price. The Company utilizes historical earning patterns to assist in this allocation.

•Fair Value of Rapid Rewards Points - Determined from the base fare value of tickets which were purchased using prior point redemptions for travel and other products and services, which the Company believes to be indicative of the fair value of points as perceived by Customers and representative of the value of each point at the time of redemption. The Company’s booking site allows a Customer to toggle between fares utilizing either cash or point redemptions, which provides the Customer with an approximation of the equivalent value of their points. The value can differ, however, based on demand, the amount of time prior to the flight, and other factors. The mix of fare classes during the period measured represents a constraint, which could result in the assumptions above changing at the measurement date, as fare classes can have different coefficients used to determine the total loyalty points needed to purchase an award ticket. The mixture of these fare classes and changes in the coefficients used by the Company could cause the fair value per point to fluctuate.

For points that are expected to remain unused, the Company recognizes breakage in proportion to the pattern of points used by the Customer, which approximates the average period over which the population of Rapid Reward Members redeem their points. The Company utilizes historical behavioral data to develop a predictive statistical model to analyze the amount of breakage expected for points sold to business partners and earned through flight. The Company continues to evaluate expected breakage annually and applies appropriate adjustments in the fourth quarter of each year, or other times, if significant changes in Customer behavior are detected. Changes to breakage estimates impact revenue recognition prospectively. Due to the size of the Company’s liability for loyalty benefits,

changes in Customer behavior and/or expected future redemption patterns could result in significant variations in Passenger revenue.

The Company allocates consideration received to performance obligations based on the relative fair value of those obligations. The Company has a co-branded credit card agreement (“Agreement”) with Chase Bank USA, N.A. (“Chase”), through which the Company sells loyalty points and certain marketing components, which consist of the use of the Southwest Airlines brand and access to Rapid Rewards Member lists, licensing and advertising elements, and the use of the Company’s resource team. In fourth quarter 2021, Chase and the Company executed a multi-year extension of the Agreement, extending the decades-long relationship between the parties. The Company estimated the selling prices and volumes over the term of the Agreement in order to determine the allocation of proceeds to each of the two performance obligations identified in the Agreement, which have been characterized as a transportation component and a marketing component. The allocations utilized are reviewed to determine if adjustment is necessary any time there is a modification to the Agreement. The Company records Passenger revenue related to loyalty point redemptions for air travel when the travel is delivered, and the marketing elements are recognized as Other revenue when the performance obligations related to those services are satisfied, which is generally the same period consideration is received from Chase.

As performance obligations to Customers are satisfied, the related revenue is recognized. The events that result in revenue recognition that are associated with performance obligations identified as a part of the Rapid Rewards Program are as follows:

•Tickets and Rapid Rewards Points - When a flight occurs, the related performance obligation is satisfied and the related value provided by the Customer, whether from purchased tickets or Rapid Rewards Points, is recognized as revenue.

•Loyalty points redeemed for goods and/or services other than travel - Rapid Rewards Members have the option to redeem points for goods and services offered through a third party vendor, who acts as principal. The performance obligation related to the purchase of these goods and services is satisfied when the good and/or service is delivered to the Customer.

•Marketing Royalties - As part of its Agreement with Chase, Southwest provides certain deliverables, including use of the Southwest Airlines’ brand, access to Rapid Rewards Member lists, advertising elements, and the Company’s resource team. These performance obligations are satisfied each month that the Agreement is active.

As of the years ended December 31, 2023 and 2022, the components of Air traffic liability, including contract liabilities based on tickets sold and unused flight credits available to the Customer, both of which are net of recorded breakage, and loyalty points available for redemption, within the Consolidated Balance Sheet were as follows:

	Balance as of
(in millions)	December 31, 2023		December 31, 2022
Air traffic liability - passenger travel and ancillary passenger services	$	3,363	$	3,061
Air traffic liability - loyalty program	4,916		5,189
Total Air traffic liability	$	8,279	$	8,250

The balance in Air traffic liability - passenger travel and ancillary passenger services also includes flight credits not currently associated with a ticket that can be applied by Customers towards the purchase of future travel. These flight credits are typically created as a result of a prior ticket cancellation or exchange, and are reflected net of associated breakage. Rollforwards of the Company's Air traffic liability - loyalty program for the years ended December 31, 2023 and 2022 were as follows (in millions):

	Year ended December 31,
	2023		2022
Air traffic liability - loyalty program - beginning balance	$	5,189	$	4,789
Amounts deferred associated with points awarded	3,466		3,506
Revenue recognized from points redeemed - Passenger	(3,639)		(3,028)
Revenue recognized from points redeemed - Other	(100)		(78)
Air traffic liability - loyalty program - ending balance	$	4,916	$	5,189

Air traffic liability includes consideration received for ticket and loyalty related performance obligations which have not been satisfied as of a given date. Rollforwards of the amounts included in Air traffic liability as of December 31, 2023 and 2022 were as follows (in millions):

	Air traffic liability
Balance at December 31, 2022	$	8,250
Current period sales (passenger travel, ancillary services, flight loyalty, and partner loyalty)	23,766
Revenue from amounts included in contract liability opening balances	(5,031)
Revenue from current period sales	(18,706)
Balance at December 31, 2023	$	8,279

	Air traffic liability
Balance at December 31, 2021	$	7,725
Current period sales (passenger travel, ancillary services, flight loyalty, and partner loyalty)	22,012
Revenue from amounts included in contract liability opening balances	(4,976)
Revenue from current period sales	(16,511)
Balance at December 31, 2022	$	8,250

On July 28, 2022, the Company announced that all existing Customer flight credits as of that date, as well as any future flight credits issued, will no longer expire and will thus remain redeemable by Customers. Prior to this change, flight credits would expire twelve months from the original fare purchase date. Flight credits for non-refundable fares will be issued as long as the flight is cancelled more than 10 minutes prior to the scheduled departure. This announcement was considered a contract modification under applicable accounting guidance and the Company accounted for such change prospectively in third quarter 2022. The Company’s balance of existing Customer flight credits as of the modification date was approximately $1.9 billion, including a portion of the extended flight credits issued during the early portion of the COVID-19 pandemic, that had been set to expire on September 7, 2022. See Note 2 for further information. As the Company continues to believe that a portion of Customer flight credits issued after July 28, 2022, will not be redeemed, it continues to estimate and record breakage associated with such amounts. The amount of breakage realized on a prospective basis, however, is expected to be lower and more stable than it has been during the pandemic as a result of this policy change.

The amount of Customer flight credits represents approximately 8 percent and 9 percent of the total Air traffic liability balance as of December 31, 2023, and December 31, 2022, respectively, compared to approximately 2 percent of the Air traffic liability balance as of December 31, 2019.

Recognition of revenue associated with the Company’s loyalty liability can be difficult to predict, as the number of award seats available to Members is not currently restricted and they could choose to redeem their points at any time that a seat is available. The performance obligations classified as a current liability related to the Company’s loyalty program were estimated based on expected redemptions utilizing historical redemption patterns, and forecasted flight availability and fares. The entire balance classified as Air traffic liability—noncurrent relates to loyalty points that were estimated to be redeemed in periods beyond the twelve months following the representative balance sheet date. Based on historical experience as well as current forecasted redemptions, the Company expects the majority of loyalty points to be redeemed within approximately one year of the date the points are issued.

Despite the Company's policy change with regards to flight credits, it has not experienced significant flight credit redemptions beyond twelve months and it currently does not expect the amount of flight credits that will be redeemed beyond twelve months to be material as of the financial statement date.

All performance obligations related to freight services sold are completed within twelve months or less; therefore, the Company has elected to not disclose the amount of the remaining transaction price and its expected timing of recognition for freight shipments.

Other revenues primarily consist of marketing royalties associated with the Company’s co-brand Chase® Visa credit card program, but also include commissions and advertising associated with Southwest.com®. All amounts classified as Other revenues are paid monthly, coinciding with the Company fulfilling its deliverables; therefore, the Company has elected to not disclose the amount of the remaining transaction price and its expected timing of recognition for such services provided.

The Company recognized revenue related to the marketing, advertising, and other travel-related benefits of the revenue associated with various loyalty partner agreements including, but not limited to, the Agreement with Chase, within Other operating revenues. For the years ended December 31, 2023, 2022, and 2021 the Company recognized $2.1 billion, $2.1 billion, and $1.4 billion, respectively.

The Company is also required to collect certain taxes and fees from Customers on behalf of government agencies and remit these back to the applicable governmental entity on a periodic basis. These taxes and fees include foreign and U.S. federal transportation taxes, federal security charges, and airport passenger facility charges. These items are collected from Customers at the time they purchase their tickets, are excluded from the contract transaction price, and are therefore not included in Passenger revenue. The Company records a liability upon collection from the Customer and relieves the liability when payments are remitted to the applicable governmental agency.