Southwest Airlines CoSTU:SWN -0.61%83 Days Inventory is 12.40 as of Mar. 2026, which is 1% below its 10-year median of 12.56. GuruFocus rates STU:SWN with a GF Score™ of 83/100 and a GF Value™ of €35.99 (Modestly Overvalued). The stock has 6 warning signs investors should review. Among 796 Transportation companies, Southwest Airlines Co ranks better than 50.13% on this metric.
The historical rank and industry rank for Southwest Airlines Co's Days Inventory or its related term are showing as below:
STU:SWN'
s Days Inventory Range Over the Past 10 Years
Min: 8.41 Med: 12.56 Max: 15.73
Current: 12.3
During the past 13 years, Southwest Airlines Co's highest Days Inventory was 15.73. The lowest was 8.41. And the median was 12.56.
STU:SWN's Days Inventory is ranked better than 50.13% of 796
companies
in the Transportation industry
Industry Median: 12.455
vs STU:SWN: 12.30
Southwest Airlines Co's Days Inventory
declined
from Mar. 2025 (13.23) to Mar. 2026 (12.40).
Inventory Turnover measures how fast the company turns over its inventory within a year.
Southwest Airlines Co's Inventory Turnover for the
three
months ended in Mar. 2026 was 7.36.
Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.
Southwest Airlines Co's Inventory-to-Revenue for the
three
months ended in Mar. 2026 was 0.11.
Southwest Airlines Co (STU:SWN) Days Inventory Explanation
Days Inventory indicates the liquidity of the inventory. Generally, a lower Days Inventory is preferred as it indicates a shorter duration to clear off the inventory. An increase of the ratio may indicate the company's sales slowed. Similar ratios related to Days Inventory are:
1. Inventory Turnover measures how fast the company turns over its inventory within a year.
Southwest Airlines Co's Inventory Turnover for the
three
months ended in Mar. 2026 is calculated as
2. Inventory-to-Revenue determines the ability of a company to manage their inventory levels. It measures the percentage of Inventories the company currently has on hand to support the current amount of Revenue.
Southwest Airlines Co's Inventory to Revenue for the
three
months ended in Mar. 2026 is calculated as
* 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.
Be Aware
A lot of business are seasonable. It makes more sense to compare Days Inventory from the same period in the previous year instead of from the previous quarter.
Southwest Airlines Co Days Inventory Related Terms
Southwest Airlines Co Days Inventory Historical Data
* Premium members only.
The historical data trend for Southwest Airlines Co's Days Inventory 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.
STU:SWN vs AAL, CPA, ALK: Days Inventory Comparison
For the Airlines subindustry, Southwest Airlines Co's Days Inventory, along with its competitors' market caps and Days Inventory 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 Days Inventory vs Transportation Industry
For the Transportation industry and Industrials sector, Southwest Airlines Co's Days Inventory distribution charts can be found below:
* The bar in red indicates where Southwest Airlines Co's Days Inventory falls into.
* 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 (STU:SWN) has a Days Inventory of 12.40 as of Mar. 2026. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Southwest Airlines Co and its competitors. This is near median its historical median of 12.56. Over the past decade, Southwest Airlines Co's Days Inventory has ranged from 8.41 to 15.73. According to the industry distribution chart, Southwest Airlines Co ranks #397 out of 796 companies in the Transportation industry, placing it in the top 49.9%.
Is Southwest Airlines Co's Days Inventory too high?
Southwest Airlines Co's current Days Inventory of 12.40 is near median its 10-year median of 12.56. Over the past 10 years, this metric has ranged from a low of 8.41 to a high of 15.73. The Transportation industry median Days Inventory is 12.46. Southwest Airlines Co's value of 12.40 is 0.4% below this industry median. Based on the distribution chart, Southwest Airlines Co ranks #397 out of 796 companies in the Transportation industry, which is above the industry midpoint. Overall, Southwest Airlines Co has a GF Score™ of 83/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Southwest Airlines Co's Days Inventory compare to AAL and CPA?
According to the Transportation industry distribution chart, Southwest Airlines Co ranks #397 out of 796 companies for Days Inventory. This puts Southwest Airlines Co in the upper half of its industry. The industry median Days Inventory is 12.46. Southwest Airlines Co's value of 12.40 is 0.4% below this benchmark. Historically, Southwest Airlines Co's own Days Inventory has ranged from 8.41 to 15.73 over the past decade. While the company's 10-year median is 12.56 vs. the industry median of 12.46, Southwest Airlines Co has consistently been below the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Days Inventory for a Transportation company?
The median Days Inventory among Transportation companies is 12.46, based on 796 companies in the industry. Companies in the top quartile (top 25%) have a Days Inventory significantly above this median, while those in the bottom quartile fall well below. However, Days Inventory should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Southwest Airlines Co's current Days Inventory of 12.40 is 0.4% below the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Days Inventory mean?
A high Days Inventory can signal that a stock is expensive relative to its fundamentals. Days inventory represents the average amount of days a company holds inventory before selling it. View historical data on Southwest Airlines Co and its competitors. For the Transportation industry, the median Days Inventory is 12.46 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Southwest Airlines Co's current Days Inventory is 12.40, which is near median its own 10-year median of 12.56. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Southwest Airlines Co stock overvalued right now?
Based on GuruFocus' analysis, Southwest Airlines Co (STU:SWN) is currently considered Modestly Overvalued. The stock's GF Value™ is €35.99, compared to a current price of €45.31 — trading 25.9% above its estimated fair value. The current Days Inventory is 12.40, which is near median its 10-year median of 12.56 and 0.4% below the Transportation industry median of 12.46. Southwest Airlines Co's overall GF Score™ is 83/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Days Inventory calculated?
Days Inventory is calculated from a company's financial statements. For Southwest Airlines Co (STU:SWN), the current Days Inventory is 12.40 as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Southwest Airlines Co (STU:SWN) Overvalued in 2026?
Based on GuruFocus' analysis, Southwest Airlines Co stock appears to be overvalued.
The current stock price of €45.31 is trading 25.9% above its estimated GF Value™ of €35.99.
GuruFocus considers Southwest Airlines Co to be Modestly Overvalued.
Key valuation signals for STU:SWN:
Days Inventory: 12.40 (near median its 10-year median of 12.56)
GF Value™: €35.99 vs. price of €45.31 (25.9% above fair value)
Industry Position: 0.4% below the Transportation median (#397 of 796)
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 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.
83GF Score
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