Southwest Airlines Co (STU:SWN) Cyclically Adjusted PS Ratio: (As of Sep. 22, 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
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Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
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Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

STU:SWN Southwest Airlines Co STU:SWN
86 GF Score
Price €36.24
GF Value €39.31
Valuation Fairly Valued
! 2 Warning Signs
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What is Southwest Airlines Co Cyclically Adjusted PS Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Southwest Airlines Co  (STU:SWN) Cyclically Adjusted PS Ratio Explanation

Compared with the regular PS Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PS Ratio smoothed out the fluctuations of revenue during business cycles. Therefore it is more accurate in reflecting the valuation of the company.

If a company has consistent business performance, the Cyclically Adjusted PS Ratio should give similar results to regular PS Ratio.


Southwest Airlines Co Cyclically Adjusted PS Ratio Related Terms


Southwest Airlines Co Cyclically Adjusted PS Ratio Historical Data

* Premium members only.

The historical data trend for Southwest Airlines Co's Cyclically Adjusted PS Ratio can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Southwest Airlines Co Cyclically Adjusted PS Ratio Chart

Southwest Airlines Co Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted PS Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 1.32 0.99 0.79 0.91 0.93

Southwest Airlines Co Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Cyclically Adjusted PS Ratio Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 0.73 0.73 0.90 0.83 1.12

STU:SWN vs AAL, CPA, ALK: Cyclically Adjusted PS Ratio Comparison

For the Airlines subindustry, Southwest Airlines Co's Cyclically Adjusted PS Ratio, along with its competitors' market caps and Cyclically Adjusted PS Ratio data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.


Southwest Airlines Co Cyclically Adjusted PS Ratio vs Transportation Industry

For the Transportation industry and Industrials sector, Southwest Airlines Co's Cyclically Adjusted PS Ratio distribution charts can be found below:

* The bar in red indicates where Southwest Airlines Co's Cyclically Adjusted PS Ratio falls into.


STU:SWN
86GF Score
Southwest Airlines Co STU:SWN
Cyclically Adjusted PS Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Southwest Airlines Co Cyclically Adjusted PS Ratio Calculation

Like the Shiller PE Ratio, the Cyclically Adjusted PS Ratio takes the Revenue per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/S calculation. Because it considers this 10-year average, it's often referred to as the CAPS Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PS Ratio.

Southwest Airlines Co's Cyclically Adjusted Revenue per Share for the quarter that ended in Jun. 2026 is calculated as:

For example, Southwest Airlines Co's adjusted Revenue per Share data for the three months ended in Jun. 2026 was:

Adj_RevenuePerShare=Revenue per Share/CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=14.71/333.9520*333.9520
=14.710

Current CPI (Jun. 2026) = 333.9520.

Southwest Airlines Co Quarterly Data

Revenue per Share CPI Adj_RevenuePerShare
201609 7.368 241.428 10.192
201612 7.580 241.432 10.485
201703 7.417 243.801 10.160
201706 8.608 244.955 11.735
201709 7.556 246.819 10.223
201712 7.518 246.524 10.184
201803 6.841 249.554 9.155
201806 8.324 251.989 11.031
201809 8.424 252.439 11.144
201812 8.911 251.233 11.845
201903 8.215 254.202 10.792
201906 9.703 256.143 12.650
201909 9.498 256.759 12.354
201912 9.819 256.974 12.760
202003 7.463 258.115 9.656
202006 1.626 257.797 2.106
202009 2.602 260.280 3.338
202012 2.862 260.474 3.669
202103 2.797 264.877 3.526
202106 5.410 271.696 6.650
202109 6.539 274.310 7.961
202112 7.328 278.802 8.778
202203 7.068 287.504 8.210
202206 9.942 296.311 11.205
202209 9.664 296.808 10.873
202212 10.193 296.797 11.469
202303 8.953 301.836 9.906
202306 10.118 305.109 11.074
202309 9.372 307.789 10.169
202312 10.646 306.746 11.590
202403 9.768 312.332 10.444
202406 10.623 314.175 11.292
202409 10.406 315.301 11.022
202412 10.137 315.605 10.726
202503 10.458 319.799 10.921
202506 11.813 322.561 12.230
202509 11.305 324.800 11.624
202512 12.272 324.054 12.647
202603 12.318 330.213 12.457
202606 14.710 333.952 14.710

Add all the adjusted revenue per share together and divide 10 will get our Cyclically Adjusted Revenue per Share.

Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.

Is Southwest Airlines Co (STU:SWN) Overvalued in 2026?

Based on GuruFocus' analysis, Southwest Airlines Co stock appears to be undervalued. The current stock price of €36.24 is trading 7.8% below its estimated GF Value™ of €39.31. GuruFocus considers Southwest Airlines Co to be Fairly Valued.

Key valuation signals for STU:SWN:

  • Cyclically Adjusted PS Ratio:
  • GF Value™: €39.31 vs. price of €36.24 (7.8% below fair value)
  • GF Score™: 86/100 with 2 warning signs

No single metric tells the full story. See the STU:SWN stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Southwest Airlines Co Business Description

Address P.O. Box 36611, Dallas, TX, USA, 75235-1611
Southwest Airlines is the largest domestic air carrier in the United States by passengers boarded. Southwest operates nearly 800 aircraft in an all-Boeing 737 fleet. Despite offering some longer routes and a few perks for business travelers, the airline predominantly specializes in short-haul, leisure flights operated with a simple cabin configuration in a point-to-point network. In early 2026, Southwest modified its cabins to offer some rows with extra legroom, its ticketing process and merchandising to offer assigned seats, and more fare categories to include a basic economy class that appears for the first time in travel aggregators' search results and more directly competes with other airlines' offerings.
86GF Score

Get the complete analysis for STU:SWN

Cyclically Adjusted PS Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€36.24
Price
€39.31
GF Value