Most important take away

Spirit Airlines failed not because of fuel prices or blocked mergers, but because its costs ballooned 43% post-pandemic while major carriers learned to compete on price through basic economy fares — and the real money in US aviation is no longer flying passengers but the co-branded credit card business, which generates 39-53% margins compared to razor-thin margins on actual flights. The political narrative blaming Biden-era antitrust decisions for Spirit’s demise misses that the JetBlue merger would have likely just dragged JetBlue down with it.

Summary

Key Themes:

• The collapse of the ultra-low-cost carrier model in the US. Spirit’s failure was driven by a 43% rise in costs since 2019 (pilots, airport fees, lost cost discipline like an 11-acre Fort Lauderdale corporate campus), changing consumer preferences toward premium experiences starting around 2015, and major airlines successfully countering with basic economy fares that match Spirit’s prices without cannibalizing higher-margin tickets.

• Antitrust counterfactuals. The blocked JetBlue-Spirit merger probably saved JetBlue from itself — JetBlue hasn’t made money in six years. More consequentially, the killed JetBlue-American Northeast Alliance removed the strategic rationale for the Spirit deal entirely and cost JetBlue its potential entry into the One World Alliance, which would have made its credit card far more valuable.

• Credit cards are the real airline business. American earned $6B+ in cash from Citibank/Barclays in 2025 against just $111M total profit. Loyalty program margins run 39-53%. Delta builds Austin service to sell Amex products; Southwest flies Hawaii to feed credit card demand. This dynamic doesn’t exist in Europe due to capped interchange fees, which is one reason European low-cost carriers (Ryanair, EasyJet) thrive on point-to-point routes with 30% lower costs than Spirit.

• Tax arbitrage drives ancillary fees. The 7.5% domestic excise tax doesn’t apply to optional fees, creating a structural incentive to unbundle. Moving $1B from ticket price to bag fees saves $75M in taxes.

• Future industry shape. JetBlue may face Chapter 11; United’s CEO Scott Kirby reportedly floated buying American to Trump (likely DOA on antitrust grounds even in this environment, plus state AGs and foreign regulators). American’s turnaround is real but slow — they bet wrong on competing with Spirit/Frontier instead of investing in premium product, leaving them with $100M profit vs. Delta’s $5B and United’s $3B+.

Actionable Insights:

• Taxis from major airports (especially DCA, JFK) are now faster than Ubers due to ride-share dispersion; at JFK Terminal 5, walk to the TWA hotel to summon a rideshare.
• Status with the dominant airline at your home airport (e.g., American at DCA) pays off most during operational meltdowns, not for upgrades.
• Spirit’s “Big Front Seat” was historically one of travel’s best deals because they couldn’t afford to remove the seats when converting to ULCC.

Housing/Politics segment:

• The Road to Housing Act survived Elizabeth Warren’s amendment that would have effectively banned building single-family rental homes; Trump reportedly reversed course after a developer made the case.
• Jack Schlossberg’s proposal to make rent tax-deductible is bad policy — most renters don’t itemize, mortgage interest deductibility exists for historical accident reasons (1913 income tax origin, 1986 reform survival), and the benefit would mostly capitalize into higher rents.
• DC’s economy has shrunk at an 8% annualized pace; housing permits have collapsed from record highs to ~1,000 units/year, while progressive candidates push social housing fantasies modeled on a single Vox article about Vienna.

Chapter Summaries

Cold Open — Major Podcast Status (0:00): Josh, Megan, and Ben celebrate New York Magazine’s recognition of Central Air as a “major podcast” in coverage of the NY-12 Democratic primary, then segue into a discussion of taxis vs. Ubers at airports.

Why Spirit Failed: Gary Leff explains the threefold collapse — costs up 43% since 2019, consumer preferences shifting toward premium starting in 2015, and major airlines mastering basic economy as a price-discrimination tool.

The Antitrust Counterfactuals: Discussion of whether blocked Biden-era mergers killed Spirit. Leff argues the JetBlue-Spirit block actually helped JetBlue, but the killed JetBlue-American Northeast Alliance was the more consequential decision that destroyed the rationale for the Spirit acquisition.

Should You Care About Spirit Dying: Spirit was 1.7% of domestic capacity; Breeze and JetBlue are already backfilling its Fort Lauderdale routes. The brand was toxic and arguably should have been abandoned years ago.

Megan’s EasyJet Brexit Anecdote: Megan recounts being trapped at Luton airport in 2016, buying wine for stranded Britons to use their power outlet, and discovering Brexit was going to happen.

Why Europe’s Low-Cost Model Works: Ryanair/EasyJet have 30% lower costs than Spirit through labor brokers, secondary airports, and point-to-point routes. US prosperity enables an upsell economy and credit card cross-subsidies that Europe’s interchange caps prevent.

DC Live Show Announcement: June 2-3 events in Washington tied to Welcome Fest.

The Credit Card Business: Co-brand cards generate 39-53% margins vs. razor-thin flight margins. American gets $6B+ from card partners against $111M total profit. Devaluation of miles is offset by bank-issued cards (Amex, Chase, Capital One) competing for the same wallet.

Ancillary Revenue & Tax Arbitrage: The 7.5% excise tax on tickets doesn’t apply to optional fees, creating massive incentives to unbundle. Discussion of Virgin America’s onboard ordering system that Alaska killed and nobody has replicated.

The Future — JetBlue, Bankruptcies, Mega-Mergers: JetBlue may face Chapter 11; founder Dave Neeleman predicted it. Scott Kirby’s apparent pitch to Trump to buy American is likely a personal vendetta from being fired by AA’s board in 2016, with no realistic chance of regulatory approval.

American Airlines Defense: Megan defends her American loyalty (DCA captive); Leff explains American’s strategic error of competing with Spirit instead of investing in premium, and their slow recent pivot.

Housing Bill Win: The Road to Housing Act may survive Elizabeth Warren’s amendment banning single-family rental construction after Trump reversed course following a developer’s pitch.

The Schlossberg Tax Deduction: Jack Schlossberg’s proposal to make rent deductible is dissected — Megan explains the historical accident origins of the mortgage interest deduction (1913 income tax, 1986 Reagan reform), and Josh argues it would mostly benefit high-income Manhattan renters who don’t need it.

DC Housing Politics: Megan critiques Janeese Lewis George’s Vienna-modeled social housing plan amid DC’s economic contraction and collapsed permitting.

Permitting Reform: Discussion of how everyone supports streamlined permitting in the abstract but loses their minds when it actually changes anything, illustrated by a DC reservoir redevelopment that took ~15 years.