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Last Monday, President Donald Trump announced that the U.S. and Iran have reached a peace deal to reopen the Strait of Hormuz, the 21-mile chokepoint through which roughly 20% of the world’s oil supply normally flows.
By mid-morning, Brent crude had dropped nearly 5% to $83 per barrel, and by Tuesday, it traded below $80 for the first time since early March. Shares of major airlines jumped on the news, led by United Airlines, which closed at a new record high. Delta Air Lines also hit a fresh all-time high.
For investors who have spent the last three-and-a-half months watching the airline sector sail through the turbulence, this week feels like confirmation of something. But confirmation of what, exactly? That’s the more interesting question.
Not All Oil Drops Are Created Equal
I’ve spent over a decade analyzing the relationship between energy prices and airline stocks, and the single most important thing I’ve learned is that falling oil and rising airline stocks are not the same thing.
Sometimes the two are correlated. Sometimes they’re not. And the difference almost always comes down to why oil is falling.
When oil drops because the economy is contracting—the way it did after the September 11 attacks in 2001, or when the global financial system seized up in 2008—airlines don’t benefit much from cheaper jet fuel.
Why? Well, if people aren’t flying, empty seats and low fuel costs still don’t add up to a good business.
But when oil falls because the supply side normalizes—an oversupply problem, a geopolitical disruption that resolves—something different happens. Travel demand stays intact, and airlines begin pocketing the spread between what passengers are paying and what carriers are now paying for fuel.
That’s what’s happening today. Airline stocks, as measured by the NYSE Arca Airlines Index, have now erased their losses from the Iran conflict as oil prices decline and demand remains strong.
What a Quarter Century of Data Tells Us
Working through daily Brent crude oil prices and the NYSE Arca Airlines Index going back to January 2000, I looked at what happened to airline stocks following four major oil price crashes.
The two demand-driven crashes told a cautionary tale. After the September 11 attacks in 2001, investors who bought airlines at the oil price trough saw a modest 20% gain over three months… then gave it all back (and then some), losing 45% over the following 12 months as the travel recession ground on.
The 2008 financial crisis told a similar story. Oil fell 74%, but airlines were still down almost 40% three months after the oil trough, as collapsing consumer confidence kept seats empty. Patient investors who held on eventually saw rebounds of 47% and 62% at the 12- and 18-month marks.
The supply-driven episodes, on the other hand, painted a completely different picture. When Saudi Arabia blocked OPEC production cuts in 2014 to defend market share, Brent crude fell 75% from peak to trough over 18 months. Airlines near the January 2016 oil price trough returned 28% over three months, 52% over 12 months, and 59% over 18 months.
Then came 2020. The pandemic crashed oil to $19 a barrel and temporarily shut down global aviation.
But once the demand catalyst became visible—vaccine approval on the horizon—the recovery was historic. Buying airlines at the April 2020 oil trough returned 21% in three months and a massive 132% over the following 12 months. That was the best 12-month return for airline stocks in the 30 years of data I looked at.
Why 2026 Belongs in the Supply Shock Column
The war in Iran created one of the most dramatic oil supply shocks in recent memory. Iran’s retaliation sent Brent to $146 a barrel, its highest level since 2008. Airline stocks fell as fuel costs compressed margins.
Unlike past episodes, though, travel demand hasn’t collapsed. Airlines have raised airfares to offset surging fuel costs… and passengers are paying them. As someone who travels often, I’ve seen packed planes all throughout this disruption.
The 2026 episode belongs firmly in the supply shock column. It was an external disruption to fuel costs that’s now coming to an end, with passenger demand fully intact.
Why the Window Matters Now
Across numerous oil price drawdowns since 2000, the historical data shows that the strongest entry point for airline stocks was not at the start of the oil decline or during the peak of the fear. It was near the oil price trough, after the big move had already happened and the situation was stabilizing. The average 12-month return from that entry point, across all 34 episodes I counted, was 19%.
With Brent back near $80 today—still above its pre-war level of roughly $64 to $67, but well off the $146 peak—and the Strait of Hormuz reopening, we appear to be in the early phase of what history suggests could be a sustained period of margin recovery for airline stocks.
Based on what 26 years of data show about how airline stocks behave after supply shocks end with demand intact, this may well be the starting gun.
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