Masa depan penerbangan hijau: outlook 2030

Where Aviation Sustainability Stands Today

Aviation enters 2030 from a position of significant structural tension: it is recovering strongly from the COVID-19 collapse, with passenger traffic returning to and in many markets exceeding 2019 levels, while simultaneously facing the most stringent regulatory and investor pressure on environmental performance in its history. Global aviation emitted approximately 800 million tonnes of CO₂ in 2023 — close to the 2019 record of 920 million tonnes — and IATA forecasts traffic will reach 7.8 billion passengers annually by 2036, roughly doubling 2023 volumes. Against this growth trajectory, the industry has committed to achieving net-zero CO₂ emissions by 2050 — a target that will require transformation rather than incremental improvement.

The starting point is a fleet that has already improved dramatically in efficiency. A Boeing 787-9 burns approximately 2.5 litres of fuel per passenger per 100 km — comparable to a modern economy hybrid car — and the latest Airbus A321XLR will achieve similar per-seat efficiency on medium-haul routes. The average fuel efficiency of new commercial aircraft delivered today is roughly 80% better per seat than the original 707, and 20% better than aircraft delivered 15 years ago. This continuous improvement through aerodynamics, engine technology, and materials has allowed the industry to grow passenger volumes significantly while holding total fuel burn relatively flat in recent years. The challenge for the 2030 outlook is whether the pace of improvement can be further accelerated and whether alternative fuels and propulsion technologies can begin making meaningful contributions at scale.

The 2030 horizon is close enough that the technologies contributing to it are already determined by what is currently in development or early deployment. Radical technologies — hydrogen combustion wide-bodies, hybrid-electric long-haul aircraft — cannot reach meaningful fleet contribution by 2030 given certification timelines, production ramp-up constraints, and infrastructure investment requirements. The 2030 outlook is therefore primarily a story of three things: how fast SAF production scales, how many next-generation turbofan aircraft enter service, and whether operational efficiency improvements can close the remaining gap. The decade after 2030 — 2030–2040 — is where electric and hydrogen technologies will begin to matter materially, if current development trajectories are maintained.

SAF: The Path to 10% by 2030

Sustainable aviation fuel is the most important near-term decarbonisation tool for aviation because it is a drop-in fuel — it requires no modification to existing aircraft, engines, or airport fuelling infrastructure, and can be blended with conventional jet fuel up to 50% (ASTM D7566) in currently certificated applications. The lifecycle CO₂ saving depends on feedstock and production pathway: HEFA (Hydroprocessed Esters and Fatty Acids) made from used cooking oil typically achieves 65–80% lifecycle CO₂ reduction; ATJ (Alcohol-to-Jet) from agricultural residues achieves 50–70%; Power-to-Liquid (PtL, using green hydrogen and captured CO₂) can theoretically achieve net-zero or even net-negative CO₂ over its lifecycle. All of these pathways face scale constraints: feedstock supply, production capacity, capital investment, and cost.

Global SAF production in 2023 was approximately 600,000 tonnes — less than 0.2% of global jet fuel demand of approximately 310 million tonnes. The EU's ReFuelEU Aviation regulation mandates 2% SAF blending at EU airports from 2025, rising to 6% by 2030, 20% by 2035, and 70% by 2050. The US Inflation Reduction Act's SAF tax credit (up to $1.75 per gallon for SAF with 50%+ lifecycle CO₂ reduction) has sparked a wave of SAF production project announcements in the United States. The UK has enacted a SAF mandate requiring 2% blending from 2025, rising to 10% by 2030 and 22% by 2040. These regulatory signals have created genuine investment momentum: the number of announced SAF production projects globally more than doubled between 2021 and 2024.

Whether global SAF production can reach 10% of jet fuel demand by 2030 — the IATA target — is contested. IATA's own analysis acknowledges that achieving the 2030 target requires approximately 30 million tonnes of SAF production globally, compared to under 1 million tonnes today. This is a 30× scale-up in six years, an unprecedented rate for any alternative fuel industry. The optimistic scenario, supported by announced projects and regulatory mandates, suggests SAF could reach 5–7% of global jet fuel by 2030; the pessimistic scenario, emphasising financing gaps, feedstock constraints, and project execution risk, suggests 2–4%. Even at the higher end, SAF remains a minority of jet fuel in 2030 — its contribution grows dramatically in the 2035–2050 period as production capacity built in the 2025–2030 period comes online and scales. The 2030 decade is therefore best characterised as the SAF infrastructure investment period, whose results will be harvested primarily after 2035.

Electric Regional Flights

Battery-electric propulsion for commercial aircraft is physically constrained by the energy density of current and near-future battery technology. Jet fuel contains approximately 43 MJ/kg of energy; the best lithium-ion battery cells commercially available in 2024 achieve approximately 0.9–1.1 MJ/kg (250–300 Wh/kg) — a 40× disadvantage in energy density by weight. For aviation, where every kilogram of aircraft weight must be lifted against gravity, this disparity fundamentally limits the range and payload achievable with battery-electric propulsion. A full battery-electric aircraft carrying the same passenger payload as a 50-seat ATR 42 turboprop would require batteries weighing approximately 5–8 tonnes just for a 200 km flight — more than the ATR's maximum takeoff weight.

This energy density reality defines the niche where electric aviation is genuinely practical by 2030: short-range, low-payload routes. Harbour Air, a Canadian seaplane operator, converted a De Havilland Canada DHC-2 Beaver to electric propulsion using a magniX motor in 2019 and received Canadian Transport Agency certification for commercial electric flight operations in 2023 — the first commercially operated electric passenger aircraft in the world. The electric Beaver operates floatplane routes in British Columbia of typically 25–50 km between small communities, where its limited range (approximately 150 km with reserves) is adequate and its zero-emissions and low-noise profile is particularly valued in ecologically sensitive coastal areas. Harbour Air has committed to electrifying its entire 50-aircraft fleet by 2026–2027.

Larger electric regional aircraft programmes — most prominently from Heart Aerospace (Sweden) with its ES-30 30-passenger hybrid-electric regional aircraft — have revised their timelines and specifications in response to battery technology realities. Heart Aerospace's original ES-19 (19-seat pure electric) was replaced in 2022 by the ES-30, which uses a battery-electric mode for short legs (up to 200 km) and a hybrid configuration using turbogenerators for longer ranges up to 400 km. Air Canada and United Airlines have both placed conditional orders. Certification is targeted for approximately 2028–2030, with meaningful fleet deployment on thin regional routes following in the early 2030s. The ES-30 represents a realistic product: it accepts that pure battery-electric propulsion is range-constrained and designs around that constraint, targeting the 100–400 km regional routes where thin traffic makes turboprop operations marginal and where even partial electrification provides significant per-flight emissions savings on the electric-mode portion.

Hydrogen Aircraft Progress

Hydrogen — either burned directly in a modified gas turbine engine or used in a fuel cell to generate electricity for electric motors — has significant theoretical advantages as an aviation fuel. Its energy density by mass is approximately 120 MJ/kg — nearly three times jet fuel's 43 MJ/kg — meaning a hydrogen aircraft could carry far less fuel weight for the same energy. The combustion of hydrogen with air produces water vapour and some NOx (from nitrogen in the air reacting with the high combustion temperatures), but no CO₂. If the hydrogen is produced by electrolysis using renewable electricity (green hydrogen), the overall lifecycle CO₂ emissions are near-zero.

The practical challenges of hydrogen aviation are substantial. Hydrogen's volumetric energy density is very poor: liquid hydrogen at cryogenic temperatures (−253°C) occupies approximately 4× the volume of an equivalent energy quantity of jet fuel. This requires either very large cryogenic fuel tanks integrated into the aircraft fuselage — which fundamentally changes aircraft architecture — or compressed gaseous hydrogen tanks, which are even more voluminous per unit of energy. Airbus's ZEROe programme, announced in 2020, presented three hydrogen aircraft concepts targeting entry into service by 2035: a turbofan derivative burning hydrogen, a turboprop burning hydrogen, and a "blended wing body" hydrogen concept. Airbus subsequently clarified that 2035 entry into service is specifically for a shorter-range regional aircraft of approximately 100 passengers — not the full-size narrow-body or wide-body originally implied in some coverage of the ZEROe announcement.

Hydrogen infrastructure is perhaps a larger challenge than the aircraft technology itself. Liquid hydrogen at cryogenic temperatures requires specialised storage tanks at airports, cryogenic-capable fuel trucks, and training for ground crews in hydrogen handling. Aviation's global network of approximately 45,000 airports cannot realistically all install liquid hydrogen infrastructure within a decade; a realistic hydrogen aviation deployment will initially be limited to a small number of hub airports on select routes where hydrogen supply chains can be established. DLR (German Aerospace Center) and the Clean Sky 2 / Clean Aviation EU research programmes are funding hydrogen ground handling development. The UK government's Jet Zero Council has identified 3–5 UK airports for hydrogen aviation pilot programmes. Norway — with large domestic renewable electricity resources, extensive experience with green hydrogen from its offshore oil industry conversion programmes, and a specific government mandate for domestic aviation decarbonisation — is frequently cited as the most favourable near-term market for hydrogen regional aviation.

CORSIA and Global Policy Frameworks

The Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA), adopted by ICAO member states in 2016, is the primary global regulatory framework governing aviation's international CO₂ emissions. CORSIA operates in two phases: a pilot phase (2021–2023) and a first phase (2024–2026) in which participation is voluntary for states, followed by a second phase (2027–2035) in which all ICAO member states are required to participate. The scheme requires airlines to offset CO₂ emissions from international flights above a baseline — initially set at 85% of 2019 emissions — using approved carbon credits from certified offset programmes.

CORSIA has been subject to sustained criticism from environmental organisations on several grounds. The offset mechanism allows airlines to claim they are "carbon neutral" for international growth above the baseline while actually continuing to increase absolute emissions — as long as they purchase equivalent carbon credits. The quality of approved offset credits has been questioned: investigations by the Guardian and others found that many REDD+ (Reducing Emissions from Deforestation and Degradation) projects approved by Verra — one of CORSIA's approved offset programmes — had overstated their climate benefit, with independent analysis suggesting the actual CO₂ prevented by forest protection projects was a fraction of the credited amount. ICAO has responded by strengthening CORSIA offset eligibility criteria for Phase 2, requiring higher standards of additionality and permanence.

Regional policy frameworks are moving more aggressively than the global CORSIA baseline. The EU Emissions Trading System (EU ETS), which has covered intra-European aviation since 2012, requires airlines operating within the EU to surrender emission allowances for their covered emissions — creating a direct carbon price for European domestic and intra-EU international flights. The EU ETS aviation sector was initially over-allocated with free allowances, blunting the price signal, but from 2024 onwards the free allocation is being phased down, increasing effective carbon cost. The EU's Fit for 55 package, which includes ReFuelEU Aviation's SAF mandates and proposed expansion of EU ETS coverage to include EU flights to non-ETS countries, represents a comprehensive policy architecture significantly more ambitious than CORSIA's global minimum standard. The UK, post-Brexit, has maintained its own ETS linked to the EU ETS for aviation and is consulting on expanding coverage.

Industry Net-Zero Commitments

IATA's resolution committing the global airline industry to net-zero CO₂ emissions by 2050, adopted unanimously at the IATA Annual General Meeting in 2021, was a landmark public commitment representing airlines accounting for over 80% of global traffic. The commitment, which IATA subsequently embedded in a detailed Fly Net Zero roadmap, projects the following contribution from different decarbonisation levers by 2050: SAF contributing approximately 65% of total emissions abatement; new propulsion technologies (electric and hydrogen) contributing around 13%; operational efficiency improvements contributing 3%; and carbon capture and offsets (for residual emissions) contributing 19%. These percentages reflect a transition that is heavily dependent on SAF scaling and — crucially — on technologies beyond current commercial readiness contributing meaningfully in the 2035–2050 window.

Individual airline net-zero commitments vary significantly in ambition and credibility. Some airlines have made 2050 net-zero commitments backed by specific interim targets, verified by SBTi or equivalent independent validators — these represent the most credible class of commitment. Others have made 2050 net-zero statements without interim targets or independent validation, which environmental analysts categorise as aspirational rather than accountable. A growing number of airlines have set science-aligned absolute emissions reduction targets for 2030 — typically 20–30% below 2019 — that go beyond CORSIA's growth-based baseline. Lufthansa Group, Air France-KLM, and International Airlines Group (BA, Iberia, Aer Lingus) have each published detailed sustainability roadmaps with specific milestones, SAF purchase commitments, and fleet renewal schedules that provide substantive backing to their net-zero claims.

The financing requirement for net-zero aviation is enormous. IATA estimates the industry will need $1.5–2 trillion of investment in SAF production, new aircraft, and infrastructure between now and 2050. This compares to the entire global airline industry's market capitalisation of roughly $250–300 billion — indicating that the investment required is several times the industry's own equity value and will necessarily involve external capital, government support, and financial market instruments (green bonds, sustainability-linked loans, blended finance structures). The SAF production investment alone — building the refineries, feedstock supply chains, and hydrogen electrolysis capacity needed to deliver 65% of 2050 mitigation — will require commitment from energy companies, infrastructure funds, and commodity investors well outside the aviation sector itself. Aviation's decarbonisation is therefore not solely an airline industry project but a systemic transition involving energy, finance, agriculture, and government policy.

What Passengers Will See by 2030

For passengers, the experience of flying in 2030 will look superficially similar to 2024, but with several meaningful differences that reflect the industry's sustainability transition. The most visible change will be in cabin interiors and sustainability communication at airports and on aircraft. Airlines have invested in lighter-weight seats using composite materials and honeycomb panels that reduce total aircraft weight and fuel consumption; these newer seats are already distinguishable by their slimmer profile and embedded screens. By 2030, the transition to next-generation seating across all cabin classes will be substantially advanced at leading carriers, both for fuel efficiency reasons and for passenger comfort improvements that airlines market alongside their sustainability credentials.

In-flight service will show the cumulative progress of plastic elimination programmes. By 2030, single-use plastic cutlery and cups are likely to be entirely eliminated from the cabin service of most EU, UK, and Australian carriers — driven by regulatory mandates (the EU Single-Use Plastics Directive already covers some airline items) and airline voluntary commitments. Business class passengers will encounter more sophisticated "circular economy" amenity kits, with refillable components, recycled-material bags, and partnerships with luxury goods brands that align sustainability with premium positioning. Economy class meal packaging will be predominantly paper, cardboard, and certified compostable materials rather than conventional plastic — though compostability at airports with limited industrial composting infrastructure remains an ongoing challenge.

SAF blending will be detectable through pricing by 2030. The EU's mandatory 6% SAF blend from 2030 will translate into a SAF surcharge — estimated at €8–15 per transatlantic ticket at moderate SAF price premiums — on EU-connected flights. Some airlines will make SAF contribution an explicit, opt-in booking add-on for passengers at all points of departure. Others will build the cost into base fares and communicate the SAF content as a transparency measure rather than an upsell. Passengers on some routes may encounter their first flights powered partly by advanced SAF feedstocks — power-to-liquid electrofuels from facilities in Iceland, Scandinavia, or the US Gulf Coast — which are likely to receive particular marketing emphasis given their near-zero lifecycle emissions. The 2030 experience of flying will not be fundamentally different, but the gradual accumulation of changes — lighter aircraft, cleaner fuels, sustainable serviceware, and transparent emissions disclosure at booking — will make the flight of 2030 materially greener than the flight of 2020, even if the destination is the same.