tapebrief
LUV · Q3 2025

LUV · Q4 2025 Earnings

Bullish

Southwest Airlines

Reported January 28, 2026

30-second summary

Q4 revenue grew 7.4% YoY to $7.44B with non-GAAP EPS of $0.58 and operating margin of 5.25%, while RASM rose 1.5% and CASM-X came in at +0.8% — below the +1.5-2.5% primary guide and inside the flat-to-+1% ex-fleet-gains range. The headline is forward: Southwest guided FY2026 adjusted EPS to "at least $4.00" against FY2025's $0.93 (a >330% step-up) and Q1 2026 RASM to at least +9.5% YoY, explicitly framed as the lower end of internal forecasts with upside withheld pending February-March booking data on the assigned/extra-legroom rollout that launched Tuesday during the quarter.

Headline numbers

EPS

Q4 FY2025

$0.58

Revenue

Q4 FY2025

$7.44B

+7.4% YoY

Operating margin

Q4 FY2025

5.3%

Key financials

Q4 FY2025
MetricQ4 FY2025YoYQ3 FY2025QoQ
Revenue$7.44B+7.4%$6.95B+7.1%
EPS$0.58—$0.11+427.3%
Operating margin5.3%—0.5%+475bps

Guidance

Guidance is issued for the full year only, refreshed each quarter. Prior and new below are the same FY updated this quarter.

Actuals vs prior guidance

MetricPeriodPrior guideActualΔResult
RASMQ4 FY2025up 1% to 3% year-over-year+1.5% year-over-yearin-line with the midpoint of the guided rangeBeat
ASMsQ4 FY2025up ~6% year-over-year+5.8% year-over-yearmarginally below guidanceBeat
CASM-XQ4 FY2025up 1.5% to 2.5% year-over-year (or flat to up 1% excluding fleet transaction gains)+0.8% year-over-yearbelow the primary guidance range but within the flat-to-1% excluding fleet gains rangeMet

New guidance

MetricPeriodGuideYoY
Adjusted EPSFY2025$0.93—
Adjusted EPSFY2026at least $4.00+330% minimum vs FY2025 actual of $0.93
Adjusted EPSQ1 FY2026at least $0.45—
ASMs year-over-year growthQ1 FY2026up 1% to 2%—
RASM year-over-year growthQ1 FY2026up at least 9.5%—
CASM-X year-over-year growthQ1 FY2026up approximately 3.5%—
ASMs year-over-year growthFY2026up 2% to 3%—
Net capital spendingFY2026$3.0 billion to $3.5 billion—

Other KPIs

Q4 FY2025
SegmentQ4 FY2025
RASM (Revenue per ASM)16.16 cents
RASM YoY Change+1.5%
RASM excluding special items YoY Change-0.2%
CASM-X (CASM excluding fuel, special items, profit sharing)12.29 cents
CASM-X YoY Change+0.8%
Load Factor77.2%
Available Seat Miles (ASMs)46,052 million
ASM YoY Growth+5.8%

Management tone

Q2 anchor → Q3 anchor → Q4 anchor: Demand stabilizing, bag fees outperforming → Execution outrunning pace of change → Structural earnings step-change unleashed

Three quarters ago, assigned seating was a 2026 EBIT modeling exercise; this quarter it is the live operating model. Q2 framed assigned seating as a planned initiative with no real-time data. Q3 introduced the "knife edge yield improvement" pre-launch booking signal and quantified >$1B incremental 2026 EBIT. Q4 reports the launch executed on schedule with "overwhelmingly positive" customer response, and the new guide bakes the initiative into a +9.5% Q1 RASM ask. "In my 38-year career in this industry, I cannot think of another airline that embarked on so many fundamental changes to their business model and in such a short time, let alone executed so well." The implication: implementation risk — the dominant overhang for two quarters — is now behind them, and the conversation has moved to demand-elasticity validation.

The guidance posture inverted from conservative ranges to a floor-with-explicit-upside. Through 2025, Southwest gave wide RASM and CASM-X ranges and beat the low end of CASM-X consistently. This quarter, FY2026 EPS is given as a single floor — "at least $4.00" — with management volunteering that this is the low end of internal forecasts and "well above Wall Street consensus." "While being well above Wall Street consensus, we are providing EPS guidance that represents the lower end of our internal forecast." That is not a Southwest tone; it is a company telegraphing it knows something the Street doesn't and is withholding it as optionality.

The earnings trajectory was reframed from "recovery from a low base" to a structural break. Q2 explained earnings via macro absorption and 2026 payoff. Q3 emphasized cost discipline as insurance on the EBIT guide. Q4 makes the bigger claim. "This transformation is expected to result in a significant step up in how we grow earnings as compared to the past few years." The $0.93 to $4.00+ arithmetic is what gives the statement teeth — this isn't a recovery narrative anymore, it's a re-rating thesis.

The macro caveat that anchored Q2 and Q3 essentially disappeared from the framing. Q2 quantified a ~$1B EBIT macro hit; Q3 chose to assume flat macro into Q4 and called out government shutdown risk. Q4 mentions macro only implicitly — the bull case is built on company-specific initiatives, not on demand inflection. Management's explicit confidence statement to Bank of America — corporate overhead and headcount down again in 2026, more cost takeout to come — implies they no longer view their FY2026 number as macro-dependent.

RASM acceleration is now positioned as decoupled from fare/yield trade-offs. Asked by Wolf about historical correlation between ancillary growth and fare softness, management explicitly reframed: ancillaries are separate purchase decisions, not yield-dilutive. "These products are expected to be meaningful contributors to further revenue growth." This addresses the single biggest analyst worry about the assigned-seating model and signals management believes the +9.5% Q1 RASM guide is additive, not at risk of being offset by fare give-back.

Recurring themes management leaned on this quarter:

Fundamental business model transformation executionDramatic earnings growth inflection in 2026Product initiatives driving revenue upside (assigned seating, extra legroom, basic economy)Operational excellence and reliability maintenance during transformationMargin expansion from revenue initiatives and cost disciplineLoyalty program and premium customer monetization

Risks management surfaced:

Booking behavior uncertainty related to assigned/extra legroom seating uptakeBusiness customer base growth dependent on product appealAircraft delivery delays from BoeingMacro demand environment (implicit in revenue forecasting)Implementation execution risk on 3,200+ flights overnight transition

Q&A highlights

Catherine O'Brien · Goldman Sachs

How does January book drafts compare to February, and relative to the 9.5% base case guide? What is driving the upside potential - higher upsell, share shift, or something else? Also, what drove the 4Q CASM beat?

Management stated bookings for new products look good but they lack sufficient close-in booking data and ancillary behavior data to provide upside guidance yet. They expect clarity in 1-2 months. Beyond current initiatives, they see opportunities in cost takeout, network optimization, and growing corporate share. 4Q CASM beat was driven by widespread cost efficiencies across all line items.

Limited close-in booking and ancillary behavior data prevents upside quantificationTimeline for upside clarity: 1-2 monthsAdditional opportunities: cost takeout, efficiency, network optimization, corporate share growth4Q cost improvements were widespread across all line items

Mike Lindenberg · Deutsche Bank

What is the gross CapEx number (net of aircraft sales)? At what inning are we in product segmentation, and what are key milestones? How will customer mix shift from 80%+ buying lowest fare to lower percentages?

Management confirmed net CapEx guidance includes aircraft sale offsets but won't break out gross figures. On segmentation, they expect shift from 80%+ buying lowest fare to 50% or less by maturity. February-March (low and high season) data will indicate full year upside potential. Early signals show customers willing to buy up even early in booking curve.

Aircraft sales offset gross CapEx; sticking with net guidanceExpect shift from 80%+ to ~50% or less buying basic product at maturityFebruary-March provides key inflection point for understanding full-year upsideEarly data shows customers willing to buy higher products even early in booking curve

Jamie Baker · JPMorgan

Why wasn't there a surge in early bird bookings ahead of assigned seating launch? Were customers already heavily buying early bird? Also, any aircraft RFPs in market?

Early bird was only available for pre-Tuesday departures; post-Tuesday used assigned seating instead. Management expects standalone ancillary acceleration close-in but doesn't fully understand the curve yet (expects clarity in 1-2 months). Confirmed no active aircraft RFPs in market.

Early bird ended Monday; assigned seating started Tuesday for new revenueStandalone ancillary expected to accelerate close-in, but full behavior pattern unclearNo active aircraft RFPs in market

Scott Group · Wolf Research

Historically ancillary increases correlate with fare decreases. What is different here? What percentage of bookings post-Tuesday are basic vs. prior? Are January exit RASM growth rates in the teens?

Management emphasized ancillaries (especially seat ancillaries) are decoupled from fare purchases - they're separate decision moments. Emphasized customer choice and buy-up opportunities rather than correlation with lower fares. Noted extra legroom seats and assignments enhance unit revenues. Won't provide month-by-month RASM guidance but implied strong growth.

Ancillaries are separate purchase decision from fares, no correlation to lower faresRevenue driven by offering customer choice and buy-up opportunitiesExtra legroom and seat assignments enhance unit revenuesNo month-by-month RASM guidance provided

Andrew DeDora · Bank of America

How are you thinking about load factor into 1Q, given 74% base and historical 80% 1Q levels? Where could more cost takeout come from in a 2-3% growth world?

Management emphasized they manage for RASM/CASM spread and revenue maximization, not load factor or yield submetrics. Noted incremental passengers come with bag/seat fees, which are factored into calculus. On costs, they're pressing harder on additional opportunities. Corporate overhead and headcount will be down again this year. Nothing yet quantified but company moving faster post-transformation.

Manage for RASM and CASM spread, not load factorIncremental passengers include bag and seat fees in revenue calculusCorporate overhead will be down; headcount down again in 2026Additional cost opportunities to be quantified throughout year

Answers to last quarter's watch list

Q4 RASM landing within the +1-3% guide against +6% capacity growth — Headline RASM came in at +1.5% YoY (16.16¢) against +5.8% capacity, landing in the low-to-mid of the guided range. But RASM ex-special items was -0.2%, suggesting the headline beat was driven by special items rather than underlying unit revenue strength. The assigned seating revenue ramp is, as suspected, back-half loaded — Q1 2026's +9.5% guide is where the ramp shows up. Status: Continue monitoring
Q4 CASM-X print vs +1.5-2.5% guide (or flat-to-+1% ex-fleet-gains) — CASM-X came in at +0.8% YoY, below the primary range and inside the ex-fleet-gains range. Third consecutive guide-low CASM-X print. Cost discipline is now structural, not circumstantial. Status: Resolved positively
FY2025 EBIT landing within or above the $600-800M range — FY2025 adjusted EBIT came in at $574M, above the most recent $500M prior guide cited by management (the original $600-800M range from Q2 had been revised down through the year). Status: Resolved positively
Assigned seating booking signal post-January 27 launch — Launch executed on schedule with "all aircraft conversions, technology development, and employee training completed on schedule" and "overwhelmingly positive" customer response. Q1 2026 RASM guide of "at least +9.5%" is the de-facto quantification — substantially above what would be possible without meaningful assigned-seating contribution. Management explicitly says the $4.00 FY2026 EPS floor is below internal forecasts. The >$1B 2026 EBIT target from the initiative is implicitly de-risked. Status: Resolved positively
Government-adjacent demand trajectory and any disclosed shutdown impact on Q4 RASM — The press release cites FAA-mandated schedule cuts (shutdown-adjacent) as the driver of the -0.2% Q4 RASM ex-special print, and management called this out directly in prepared remarks. The +9.5% Q1 RASM guide implies management does not view government-adjacent demand as a material drag into 2026. Status: Resolved positively

What to watch into next quarter

Whether management converts the "at least $4.00" FY2026 EPS floor into a range with an upper bound at the Q1 print — they committed to providing range-bound guidance "when current quarterly results are reported, if not earlier." The upper end is the signal; a range like $4.25-4.75 or higher would validate the deliberate-underguide thesis.

Q1 2026 RASM landing at or above +9.5% YoY — the single most consequential number. A print at +9.5% confirms the floor; a print at +12-15% confirms that the floor was set conservatively and that February-March bookings exceeded plan.

Buy-up penetration on assigned/extra legroom seating, however management chooses to disclose it — Lindenberg's "80% to 50%" framing for basic-fare mix shift is the testable claim. Any disclosure of % of bookings choosing premium seat products would directly anchor the 2027 ramp to ~$1.5B EBIT.

CASM-X printing inside the +3.5% Q1 guide while ASMs grow only +1-2% — unit cost growth ~3x capacity growth is structurally tight; landing below the guide would extend the four-quarter beat streak and reinforce the cost moat.

Net capex execution against the $3.0-3.5B range — Boeing 737-8 delivery pacing (66 planned) is the wildcard; any slippage compresses the fleet modernization that underwrites unit cost improvement.

Sources

  1. Southwest Airlines Q4 2025 earnings press release, SEC filing: https://www.sec.gov/Archives/edgar/data/92380/000009238026000002/er-12312025xerdoc.htm
  2. Southwest Airlines Q4 2025 earnings call Q&A (analyst attribution: O'Brien/Goldman Sachs, Lindenberg/Deutsche Bank, Baker/JPMorgan, Group/Wolf Research, DeDora/Bank of America)

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