Why major carriers are escalating the pushback now and what they want changed

2026 is when EU ETS aviation turns from a managed compliance line item into a material cash cost. Free allocation for aviation is being phased out and is set to end by 2026, after progressive cuts in 2024 and 2025. That creates a step change for carriers with high intra-EEA exposure, because allowances that were partially received for free must be bought at market price.

Cash flow is the part CFOs and treasury teams feel first. Buying EUAs is not just an “environmental cost”. It is a commodity-style procurement problem with price risk, timing risk, and liquidity mechanics. As free allocation disappears, airlines move from “compliance plus partial hedging” to full exposure to EUA spot and forward prices, including the practical realities of margins, collateral, and working capital when using exchange-traded futures and related hedges.

Airlines and industry associations are also being very specific about what they want changed. The recurring asks are to slow or soften the removal of free allowances, add mechanisms that contain volatility or extreme price moves, expand recognition for sustainable aviation fuel and decarbonisation investments, and avoid widening scope to extra-EEA flights if CORSIA remains the global framework.

The market data makes one point clear for buyers watching the politics. Based on EU-published indicators, the average EUA price over the six months before March 2026 is about €79.01, while the Article 29a “excessive price fluctuation” trigger threshold is about €164.89. That gap matters because it supports the airlines’ argument that the near-term risk is structural and political, not that a technical trigger is about to force an automatic intervention.

Competition is the subtext that turns this into a public clash. Carriers often frame their position as pro-decarbonisation but against a carbon pricing design that reshapes hub competition and route economics. That framing also raises reputational and antitrust sensitivities, because coordinated messaging can look like coordinated pricing. The core claim is still simple: carbon cost changes who can profitably serve which routes, and who can undercut whom.

The real competitive issue: extra-EU carriers, route economics, and carbon cost pass-through

The competitive distortion debate starts with scope. EU ETS aviation primarily bites on intra-EEA flying, while many premium and long-haul economics depend on feeding traffic through European networks. That creates a fear of substitution: passengers and cargo can be re-routed via non-EEA hubs to reduce exposure to ETS-covered segments, even if total journey emissions do not fall in a meaningful way.

Route economics is where the ETS cost becomes real for procurement teams and corporate travel buyers. The cost per passenger and per ASK depends on fuel burn, load factor, stage length, and cabin mix. A simple order-of-magnitude example used in market commentary is 700,000 tCO₂ at €80 per tonne, which implies about €56 million per year of additional cost that would previously have been partially covered by free allocation. The point is not the exact number for every carrier. The point is that the cost can be large enough to change network decisions and pricing behaviour.

Pass-through is not uniform, and buyers should not assume they will “see the ETS” in the same way across products. Leisure short-haul is typically more price elastic, so pass-through can be partial and constrained by low-cost competition. Corporate travel is often more tolerant of surcharges and indexing, so pass-through can be higher and more explicit through contract terms. The practical buyer question is the one travel managers and logistics procurement teams keep asking: will this show up as a transparent ETS surcharge on the invoice, or will it be embedded in fares and harder to audit?

“Carbon leakage” in aviation is also not a factory moving abroad. It is traffic shifting and re-routing. That is why policy discussions keep circling back to whether the EU should include flights departing the EEA to third countries, as a way to reduce circumvention incentives and align carbon cost with network reality.

This is where carbon pricing and politics meet trading fundamentals. If the competitive issue is really about asymmetric scope and uneven pass-through, then the critical variable becomes the EU’s next policy choice. That choice determines how much additional allowance demand aviation creates, and how much policy risk gets priced into EUAs.

What policy paths the EU could take next and how each would affect allowance demand and prices

The 2026 review dynamic matters because it is explicitly linked to CORSIA alignment and global participation. The Commission is expected to assess effectiveness and alignment, and if CORSIA is deemed insufficient the EU can propose changes. Those changes could include expanding ETS scope, or maintaining the current approach with targeted adjustments.

Scenario A is status quo scope with full auctioning for intra-EEA. Allowance demand from aviation rises mainly because free allocation goes to zero, not because coverage expands. In this scenario, EUA prices are still primarily driven by system-wide fundamentals like the cap, the Market Stability Reserve, and demand from power and industry. What changes is microstructure: airline buying becomes more continuous and more correlated with traffic and hedging cycles, which can affect spot-forward dynamics around compliance and year-end hedging.

Scenario B is extending scope to “departing flights”. This is the high-impact, high-politics option because it would cover much more CO₂. Even before any law changes, expectations can move prices. Market reporting in February 2026 linked a drop in EU carbon prices to political rifts over ETS, with references to levels below about €71 and December 2026 around €72.95 in that context. Traders care because policy probability, not just emissions, can reprice the curve.

Scenario C is more SAF allowance support or crediting. The ETS framework includes a pool of 20 million allowances reserved over 2024 to 2030 to address the price gap between SAF and fossil jet fuel. This can reduce net EUA demand for operators that can access and substantiate eligible SAF use, but it increases MRV complexity. Proof of sustainability and avoiding double claiming become operational constraints, not footnotes.

Scenario D is adding stabilisation mechanisms or supply adjustments. The EU publishes indicators and thresholds related to Article 29a, but the practical question for 2026 is legislative realism. Even if stakeholders want price containment, the timeline for changing supply-side rules is not the same as the timeline for airlines needing to hedge and budget. That mismatch is why “political volatility” can matter more than “technical trigger risk”.

Any of these paths has to coexist with CORSIA and anti-double counting rules. The moment scope expands or SAF incentives grow, overlap risks increase between ETS compliance, CORSIA eligible units, and the integrity claims buyers make in the voluntary carbon market.

Spillover to aviation compliance beyond Europe: CORSIA alignment, double counting risks, and credit quality

EU law treats CORSIA as a parallel system with its own eligibility and anti-double counting requirements. Operationally, that means separate processes and calendars. EU ETS requires annual surrender of allowances. CORSIA uses cancellation of eligible units and verified reporting on a multi-year cycle, with the delegated regulation referencing a deadline of 30 April 2028 for the 2024 to 2026 period.

The baseline and the start of obligations are also key for planning. With CORSIA’s updated baseline set to 2019, offsetting is expected to apply to emissions from 2024 onward, reported in 2025, within the first period of 2024 to 2026. Many airlines therefore face a two-track procurement reality: EUAs for ETS exposure and a portfolio of CORSIA eligible credits for offsetting obligations.

Double counting and double claiming are where compliance risk becomes reputational risk. The technical friction points include corresponding adjustments by host countries, claims made under different GHG schemes, and the risk that the same SAF attribute or the same emissions reduction is effectively counted twice across systems. The EU’s CORSIA implementation includes explicit requirements intended to prevent this, which pushes airlines and intermediaries toward more documentation, tighter chain-of-custody, and clearer claims language.

Credit quality is a separate question from regulatory eligibility. “CORSIA eligible” answers whether a unit can be used for that specific obligation. It does not automatically settle debates about additionality, permanence, or quantification uncertainty. Buyers and intermediaries price that distinction through discounts, tighter due diligence, and sometimes by narrowing acceptable project types even when rules allow broader use.

This matters commercially for project developers and brokers because fungibility is limited. A unit that works for one purpose may not work for another, and uncertainty in EU policy can change airline procurement behaviour quickly. When buyers become cautious about eligibility and double counting, capital tends to move away from early-stage pipelines and toward credits with clearer documentation and lower perceived reversal or claims risk.

Asia’s carbon market momentum at risk: how EU ETS uncertainty is already chilling developer pipelines and financing

Uncertainty in EU ETS and CORSIA transmits directly into the cost of capital for projects. When airline buyers cannot forecast ETS scope, CORSIA obligation intensity, or which credits will remain acceptable without claims risk, they delay multi-year procurement. Developers then face weaker forward offtake, larger haircuts in ERPAs, and stricter lender requirements in project finance.

Pipeline chill is mostly a contracting problem, not a methodology problem. Fewer pre-purchase agreements reduce a developer’s ability to fund MRV, registration, assurance, and the basic cadence of validation and verification. This is especially acute for nature-based projects and for methodologies under scrutiny where integrity expectations are high and documentation burdens are heavier.

Market segmentation adds another layer. Many Asian markets have domestic compliance systems with carbon prices that can be materially lower than EUAs. If the EU tightens aviation rules, airlines may rationally prefer one compliance path over another, depending on relative cost and risk. That can swing global demand between EUAs and offsets, which in turn changes the bankability of projects that were counting on international demand.

Investors can separate what is “policy beta” from “project alpha”. In a 2026 environment where headlines can move EUA prices, value tends to concentrate in contracts that explicitly handle regulatory change, pricing structures that can be indexed with floors or collars, and credits with clear corresponding adjustments when they are required for the intended use case. The market signal is already visible in reported EUA price moves tied to political rifts, and that volatility feeds back into airline procurement models and risk appetite for long-dated offtake.

The takeaway is not that Asian carbon markets are “dependent” on Europe. The takeaway is that aviation is a globally connected demand channel, and uncertainty in one major compliance regime can tighten financing conditions far away through procurement delays and higher perceived claims risk.

What to watch in the next 90 days: signals for airlines, carbon traders, and credit suppliers worldwide

EU policy signals will move first, and buyers should focus on what is verifiable. Watch for official communications tied to the 2026 CORSIA review and any concrete options on scope, including whether “departing flights” is being actively developed or parked. Watch also for technical consultations on ETS aviation implementation and MRV updates, because operational details often determine real compliance cost.

Price and volatility signals are the second layer. Track the EU-published Article 29a indicators, including the six-month average and the published threshold, to separate real intervention risk from noise. Trading desks will also watch positioning and spreads between carbon markets during periods of political disagreement, because cross-market spreads can become a proxy for policy risk.

Airline procurement signals are more subtle but often show up in plain sight. Look for increased hedging activity in forward vintages like Dec-26 and Dec-27, and for clearer carbon cost guidance in earnings disclosures. For corporate travel buyers, the practical ask is simple: insist on pass-through clauses that are transparent and auditable, so you can distinguish an ETS-driven surcharge from general fare inflation.

SAF signals matter because they change net ETS exposure. Monitor updates on the allocation and use of the SAF allowance mechanism and any clarifications on sustainability proof and double claiming prevention. These details influence whether SAF reduces compliance cost in practice or remains a high-friction option.

Credit supplier signals will come from CORSIA process updates. Watch for changes in participating states, eligible unit lists, verifier expectations, and interpretations of double counting safeguards. In parallel, watch buyer behaviour: if more buyers demand proof of corresponding adjustments or tighten acceptable credit types, that will reshape demand curves quickly.

A simple decision matrix helps keep this actionable:

  • Trigger: EU announcement on scope
    Airlines: revisit hedge ratios and timing, update surcharge logic in corporate contracts
    Traders: reprice policy probability into the curve, stress test liquidity and spreads
    Developers: renegotiate offtake terms with regulatory change clauses, avoid overcommitting volumes without eligibility clarity

  • Trigger: EUA volatility breaks out of recent ranges
    Airlines: increase focus on collateral and working capital planning, not just average price
    Traders: tighten risk limits around headline events, watch prompt spreads and liquidity
    Developers: prefer indexed pricing structures with floors, reduce exposure to spot-linked downside

  • Trigger: CORSIA eligibility or anti-double counting interpretation shifts
    Airlines: separate “eligible” from “claimable” in procurement specs and internal reporting
    Traders: reassess fungibility assumptions between CORSIA and voluntary credits
    Developers: prioritise documentation, corresponding adjustments where needed, and conservative claims language