Finnair's Emissions Rose 10% Because Russia Closed Its Airspace

Airlines locked out of Russian airspace burn 13.8% more fuel per flight on Europe–Northeast Asia routes than rivals still flying over it. That's the headline number from aviation analytics firm Skailark, which compared fuel burn on identical routes and aircraft types in 2019 and between March 2025 and June 2026.

The extra burn adds 1.53 million metric tons of CO2 a year, or 12% of those flights' total emissions. For carriers selling long-haul seats, that's not an ESG footnote. It's a cost structure problem sitting squarely on the wrong side of the ledger.

How did we get here?

Russia barred EU and UK carriers from its airspace in 2022, retaliating for bans on Russian airlines after the invasion of Ukraine. Carriers from Japan, South Korea, and Taiwan largely avoid the same airspace on safety grounds. Between them, they've cut off the most efficient routings between Europe and Northeast Asia.

The pain isn't distributed evenly. Finnair, whose Helsinki hub was built precisely to sit on the Europe–Asia great-circle path, is the most exposed carrier in the dataset.

What does it cost Finnair specifically?

Its Northeast Asia flights now take 33.2% longer and burn 33.5% more fuel. Riku Aho, the airline's sustainability VP, said company-wide gross CO2 emissions are up roughly 10% since 2019. Aho also pointed to knock-on effects across fleet planning, navigation, crew costs, and aircraft utilization (how many revenue hours an aircraft produces per day).

Finnair says it remains committed to its climate targets. A longer route makes that commitment more expensive, not less.

ANA and Japan Airlines each burn more than 16% more fuel on the affected corridors. Air France, KLM, and Lufthansa also rank among the most affected operators.

Who's winning the reroute?

Carriers from China, the Gulf, and Türkiye still overfly Russia, and they're converting the fuel gap into network expansion in Europe. Emirates recently launched Helsinki. That's the competitive mechanics in one route announcement: a Gulf carrier entering the home market of the airline hit hardest by the detour.

European carriers are retreating where the math stops working. British Airways suspended London–Beijing, and Virgin Atlantic dropped Shanghai in 2024. A Lufthansa spokesperson called the situation a structural competitive disadvantage for European carriers. Structural is the operative word — it doesn't fix itself with a seasonal fare adjustment.

Why the timing compounds the problem

The fuel penalty lands while two cost pressures tighten. Jet fuel sits at $4.59 per gallon. And the EU's SAF blending mandate (a rule requiring airlines to mix a share of sustainable aviation fuel into their kerosene) is underway, adding a priced premium on top of already-higher baseline consumption.

An airline burning 13.8% more fuel per flight doesn't just pay 13.8% more at the pump. It also buys more mandated SAF, carries more fuel weight, and crews longer rotations. Distribution-wise, the carriers with the cheapest Europe–Asia seat cost are increasingly the ones still flying the shortest line.

Finnair, for its part, isn't building a recovery plan around détente. The airline isn't planning for Russian airspace to reopen soon — which means the 10% emissions increase and the 33.5% fuel premium on its core Asia franchise are, for planning purposes, permanent fixtures until proven otherwise.