Only 53% Full: Alaska Airlines' 10 Emptiest International Routes Revealed [Full List]

Why It Matters

The low load factors expose profit pressures on Alaska’s thin international routes, prompting network re‑evaluation, while the new European services signal a strategic shift toward higher‑yield long‑haul markets.

Key Takeaways

• St. Louis‑Puerto Vallarta load factor 52.6%, worst route.
• Alaska added Europe routes: Seattle‑Rome, Seattle‑London, Seattle‑Iceland.
• International seat load fell to 82% despite 6.8% passenger growth.
• Sacramento‑Los Cabos removed after 67.6% load, flights ended April 2026.
• Las Vegas‑Puerto Vallarta runs at ~70% load, returning winter 2026/27.

Pulse Analysis

Alaska Airlines’ international network is at a crossroads. While passenger numbers rose modestly, the airline’s aggressive capacity expansion—driven in part by Hawaiian‑operated Asian services—diluted load factors to 82%, below the carrier’s historic benchmarks. This trend mirrors a broader industry challenge: balancing growth ambitions with the economics of thin routes, especially in the post‑pandemic era where demand volatility remains high. Investors watch these metrics closely, as sustained under‑performance can erode yields and strain cash flow.

The under‑performing Mexico‑U.S. links, notably St. Louis‑Puerto Vallarta at just 52.6% load, highlight the risks of over‑extending into niche leisure markets without sufficient demand elasticity. Comparisons with JetBlue’s former service, which achieved a 75.3% load, underscore the competitive pressure on price‑sensitive travelers. Alaska’s decision to cut Sacramento‑Los Cabos after a sub‑70% load reflects a pragmatic approach to prune routes that fail to meet profitability thresholds. Simultaneously, the airline’s commitment to maintain Las Vegas‑Puerto Vallarta despite modest loads suggests confidence in ancillary revenue or seasonal demand spikes.

Looking ahead, Alaska’s foray into Europe—adding Seattle‑Rome, Seattle‑London and Seattle‑Iceland—signals a strategic pivot toward higher‑yield, longer‑haul markets where load factors tend to be more robust. If the carrier can leverage its existing Pacific hub strengths while capturing premium transatlantic traffic, it may offset losses from thinner North‑American routes. Stakeholders will monitor how quickly these new services achieve sustainable loads and whether Alaska adjusts capacity on marginal routes to improve overall network profitability.