I book flights as part of my job and my life — reporting, visiting sources, and sometimes just getting away for a weekend. Lately I’ve found myself scrutinising the tiny checkbox that promises to “offset” a flight’s emissions. Airlines now lean on carbon offset claims as if a few pounds added to your ticket erases the climate impact of flying. But not all offsets are created equal. Some are solid, verifiable climate actions; others are classic greenwashing dressed up as good intentions.
Why I’m suspicious — and why you should be too
When an airline asks if you want to make your flight “carbon neutral,” it’s tempting to click yes and move on. I’ve learned to pause. The problem isn’t the idea of offsetting itself — high-quality offsets can be part of a broader strategy — it’s the way some airlines present them: vague claims, unclear accounting, and projects that wouldn’t have happened without your money. That’s why I now look for concrete evidence before I pay extra.
Five red flags that usually mean greenwashing
Here are the warning signs I look for when booking. If you see any of these, ask more questions or skip the offset option.
Vague language with no verification mentioned. Phrases like “carbon neutral,” “we offset emissions,” or “supports climate projects” without naming standards or verifiers are a big red flag. Legitimate offsets are verified by recognised programmes such as Gold Standard, VCS (Verified Carbon Standard), or audited under national frameworks like ICAO CORSIA.No clear description of the project type or location. If the airline won’t tell you whether your money funds a wind farm, forest conservation, or a cookstove project — and where it is — assume the claim is weak. Transparency about project type, developer and country is essential.Projects that depend on buyer-funded revenue to exist (low additionality). Some projects were already going to be built or already financed; selling offsets on them doesn’t reduce extra emissions. Ask whether the project has demonstrated “additionality” — that it wouldn’t have happened without offset funding.Short-term or reversible carbon storage (low permanence). Offsets based on activities that can be reversed easily — like some forestry projects at risk of logging or fire — carry permanence risks. If the project doesn’t include buffer pools or long-term safeguards, the climate benefit might be temporary.Bundled or double-counted claims. If an airline claims a flight is “net zero” but the offsets are also claimed by the project developer, or by government reporting, that’s double counting. Or if the airline combines emissions they directly control with those of suppliers or passengers without clear accounting methods, it’s muddled and misleading.What to ask before you buy an offset
When I want to hold an airline accountable, I ask precise, simple questions — and I expect precise answers. You should too. Here’s my checklist of questions to ask at booking or via customer service:
Which specific projects will my payment fund? I want project names, locations, and developer information. If an airline only says “we fund various projects” I treat that as insufficient.What verification standard is used? Good answers reference Gold Standard, VCS, or a third-party auditor. Ask for links to the project registry entry (e.g., Verra registry) so you can check for yourself.How is additionality demonstrated? Ask how the airline proves that the project wouldn’t have happened without their funds.What is the expected CO2 reduction per pound/dollar I pay? Airlines should be able to explain how many tonnes of CO2 your contribution offsets and the methodology used.Is there a risk of reversal and how is it managed? For forestry and nature-based projects, I ask about permanence, buffer reserves, and insurance mechanisms.Does the offset prevent double counting? Request confirmation that the tonnage sold to you is retired in a public registry and won’t be claimed by anyone else.Understanding project types — a quick comparison
| Project type | Typical strengths | Typical weaknesses |
| Renewable energy (wind, solar) | Clear emissions reductions, measurable, often long-lived | Can be non-additional if already subsidised; grid effects complicate accounting |
| Forestry / avoided deforestation | Co-benefits for biodiversity and communities | Permanence risk (fires, logging), monitoring challenges |
| Household cookstoves / fuel-switch | Immediate health and local benefits | Some projects overstate savings; short-term behaviour change issues |
| Carbon capture (direct air capture, CCS) | Potential for long-term removal | Expensive, technology still scaling; additionality and permanence vary |
Practical steps I take when I book a flight
I combine skepticism with action. Offsets can play a role, but they’re not a free pass to ignore emissions reductions at source. Here’s my booking routine:
Check airline climate policy first. Does the airline have a published decarbonisation plan with short-term targets and fleet improvement commitments? Airlines that invest in fuel efficiency, new aircraft, and sustainable aviation fuels (SAF) are more likely to use offsets responsibly.Ask for project details before paying. If the booking flow is vague, I contact customer service or search the airline’s sustainability pages for links to project registries.Prefer offsets tied to verified removals or high-quality mitigation. I look for projects with third-party verification and public registry entries showing retirement of credits.Consider alternatives to offsets. When possible, I choose airlines with better direct emissions performance, fly economy (lower per-passenger emissions), combine trips, or opt for ground travel if feasible.Use reputable offset providers. If I buy offsets independently, I pick providers like Gold Standard projects or Verra-registered offsets and avoid vague marketplaces that bundle low-quality credits.What to do if an airline won’t answer
Sometimes you’ll get boilerplate responses. I escalate by asking for public links to the project registry entry — if they can’t provide that, I don’t pay. You can also push for transparency on social media; public questions prompt faster, clearer answers more often than private emails.
Finally, remember this: offsets are a last resort to address emissions that can’t yet be eliminated. Real progress comes from airlines reducing fuel use, investing in SAF, and adopting efficient fleets. When booking, my priority is to reduce impact first and buy credible offsets only when I’m confident they do what they claim.
