Strait of Hormuz closure drives 33.2% gas price surge, rippling through supply chains

For supply chain operators, the Strait of Hormuz isn't just a geopolitical flashpoint — it's the single point of failure for roughly one-fifth of the world's oil supply. When Iran's military effectively closed the strait in early 2026, the shockwaves hit Canadian logistics within weeks: gasoline up 33.2% year-over-year in May, jet fuel surcharges embedding themselves into air freight costs, and transportation budgets stretched to levels not seen since Russia invaded Ukraine in 2022. The question now isn't whether supply chains can survive a temporary spike — it's whether they've built the resilience to absorb the next chokepoint crisis.

Canada's inflation rate surged to 3.2% in May 2026, its highest level since December 2023, driven overwhelmingly by a 33.2% year-over-year spike in gasoline prices tied to the closure of the Strait of Hormuz amid military conflict with Iran. The latest Statistics Canada consumer price index data, released June 22, marks the third consecutive month of accelerating gas-driven inflation and the first breach of the 3% threshold in over two years — yet virtually every economist weighing in characterized the jump as a transitory supply-side shock rather than a signal of entrenched price pressures.

“

Canada's inflation rate surged to 3.2% in May 2026, its highest level since December 2023, driven overwhelmingly by a 33.2% year-over-year spike in gasoline prices tied to the closure of the Strait of Hormuz amid military conflict with Iran.

The primary mechanism is straightforward: the Iran conflict has effectively shuttered the Strait of Hormuz, the world's most critical oil transit chokepoint through which roughly 20% of global petroleum passes. The resulting supply disruption pushed pump prices to levels not seen since June 2022, when Russia's invasion of Ukraine triggered a similar energy crisis. But a critical difference is already emerging. BMO chief economist Doug Porter noted that June is tracking for a roughly 10% decline in gasoline prices as peace talks between the United States and Iran progress, which would "clip the headline result next month." This rapid retreat in energy costs — even before any diplomatic resolution — underscores how the current inflation episode is fundamentally different from the broad-based, demand-fueled inflation that characterized 2022-2023.

Beneath the headline number, there are secondary pressure points worth monitoring. Air transportation costs rose 7.4% annually in May, reversing a slight decline in April, as jet fuel surcharges — also driven by the Strait of Hormuz disruption — finally showed up in the data. CIBC senior economist Andrew Grantham flagged an important timing nuance: airfare is recorded in the CPI at the time flights are taken, not when tickets are purchased. That means consumers who booked summer vacations months ago and absorbed jet fuel surcharges at booking are only now seeing those costs reflected in official inflation figures. Grantham expects air transportation and travel tours to remain sticky components through the summer before decelerating in the fall.

Grocery price inflation also ticked higher, though the source articles truncated before providing specific figures for food costs. This is a politically sensitive category that tends to amplify public perception of inflation well beyond its actual weight in the CPI basket. Combined with elevated gas prices at the pump, the household-level experience of inflation is likely running hotter than the 3.2% headline suggests, particularly for lower-income households that spend a disproportionate share of income on fuel and food.