By Laura Busby, Director of Growth & ESG and Chair of the Travel Policy Working Group for Planet Plan, Business Travel Association
Business travel is back and with it, renewed scrutiny of its environmental footprint. For most organisations pursuing net zero targets, Scope 3 emissions from travel, accommodation, and events represent one of the largest and most actionable categories of carbon output. The question is no longer whether to address travel sustainability, but how to do it effectively.
A well designed sustainable travel programme doesn’t just reduce emissions. It drives cost efficiency, supports employee wellbeing, and demonstrates genuine ESG commitment to clients, investors, and regulators. Through our work with the Planet Plan initiative at the Business Travel Association, we’ve developed practical frameworks that organisations of all sizes can adopt. Here’s how to build a programme that delivers measurable results.
Start with the business case
The most successful sustainable travel programmes begin not with environmental arguments alone, but with a clear understanding of why sustainability matters to the business. Carbon reduction is important but it’s rarely sufficient to secure organisational buy in on its own.
Identify the business drivers that resonate with your leadership team. These might include efficiency of spend, customer pressure creating risk of lost revenue, regulatory requirements, or reputational considerations. Quantify the business outcomes you expect to achieve. When you frame carbon budgets as tools that address commercial priorities alongside environmental ones, you’re far more likely to secure the resources and support needed for implementation.
Integration with your broader business strategy is essential. The most effective programmes emerge when finance, sustainability, and procurement teams collaborate from the outset. Travel policy shouldn’t exist in isolation, it should reflect and reinforce your organisation’s strategic direction.
Establish carbon budgets that reflect business reality
Many organisations approach carbon budgeting by simply applying a percentage reduction to the previous year’s emissions. This approach, while straightforward, often fails because it ignores business dynamics.
The organisations that succeed with carbon budgets start with historical data but also factor in future business needs. If you’re expanding headcount by 15% in EMEA, or planning a major product launch requiring customer visits, your carbon budget must account for these realities. A budget disconnected from operational requirements will be ignored or circumvented.
Effective carbon budgeting requires unified data across booking platforms, expense systems, and travel management tools. Invest in software that can consolidate these sources, enabling accurate historical analysis and realistic forward projections. Allocate budgets by department or business unit, giving leaders ownership of their team’s emissions alongside their financial targets.
Targets have proven far more effective than policies alone in driving behavioural change. Provide managers with visibility into their team’s performance through dashboards showing current utilisation, rolling forecasts, and projected year end position. When leaders can see not just where they are but where they’re heading, they make different decisions.
Rethink air travel from first principles
Air travel typically represents the largest share of business travel emissions, making it the obvious starting point for any sustainable programme. But the goal isn’t to eliminate flying, it’s to ensure every flight is genuinely necessary and as low impact as possible.
The first question should always be: can this meeting be conducted virtually? Video technology has matured dramatically, and hybrid approaches can often achieve business objectives without the time, cost, and carbon of physical travel. Implementing pre trip approval processes that require justification for air travel encourages travellers to assess environmental impact before confirming bookings.
When flying is necessary, the choices made at booking significantly affect emissions. Direct flights produce less CO₂ than connections, a London to New York direct flight generates approximately 750kg of CO₂ per passenger, while routing via Amsterdam adds around 50kg due to additional take offs and landings. Economy class has roughly half the per passenger footprint of business class, since seats occupy less space and fewer resources.
For shorter distances, rail should be the default. The contrast is stark: London to Manchester by air produces 145kg of CO₂ per passenger, by rail, just 29kg. That’s 116kg saved per traveller, equivalent to what six mature trees absorb annually. For European routes under six hours by train, rail typically offers comparable or better city centre to city centre times once you factor in airport procedures.
Make emissions data visible at the point of booking. When travellers can see the carbon cost of their options alongside price and journey time, they consistently make greener choices. Integrate this information into your booking platform and provide training on how flight choices affect carbon footprint.
Embed sustainability across all transport modes
While air travel commands the most attention, ground transportation and rail offer significant opportunities for emission reduction.
Rail should be mandatory for domestic or short haul trips under four hours or 500km where viable options exist. Prioritise electric trains and operators powered by renewable energy. Standard class should be the default, with upgrades requiring approval and justification. Track the percentage of eligible trips completed by rail and celebrate improvements.
For ground transportation, define clear guidelines specifying when to use rental cars, rideshare, or public transport. Electric vehicles should be prioritised for rentals, for trips under 200 miles, EVs should be the default selection where charging infrastructure permits. Public transport works well for city centre travel and offers the lowest emissions per passenger kilometre.
Route optimisation matters more than many organisations realise. Combining trips, selecting appropriate vehicle sizes, and booking in advance all contribute to reduced emissions and costs. Provide employees with journey planning tools that evaluate options before defaulting to the most convenient choice.
Make hotel choices count
Accommodation often receives less attention than transport in sustainability discussions, but hotel bed nights contribute meaningfully to Scope 3 emissions. The good news is that sustainable options aren’t necessarily more expensive.
When selecting hotels, look for recognised environmental certifications, Greengage, Green Key, Green Tourism, ISO 14001. Understand the qualifying criteria for each accreditation and prioritise properties with genuine sustainability initiatives: renewable energy, water saving processes, and waste reduction programmes.
Location matters beyond convenience. Hotels close to meeting venues reduce the need for additional transport. Properties near train stations or with EV charging infrastructure support sustainable onward travel. Encourage staff to walk where possible, reinforcing health and wellbeing alongside environmental benefits.
Work with your Travel Management Company to display carbon impact ratings for accommodation. DEFRA publishes conversion factors for hotel bed nights that enable standardised emissions calculations. Routing bookings through your TMC also supports duty of care by tracking traveller locations.
Consider personalising corporate bookings for sustainability. For group events with multiple night stays, laundry reduction programmes can meaningfully cut water and energy consumption. These small adjustments, applied consistently, add up.
Drive cultural change
Policy changes alone won’t transform travel behaviour. Sustainable travel must become embedded in corporate culture through awareness, incentives, and visible leadership commitment.
Run campaigns highlighting low carbon travel behaviours and the cumulative impact of individual choices. Offer recognition or rewards for employees who consistently choose sustainable options, whether that’s selecting direct flights, flying economy, replacing flights with virtual meetings, or choosing rail over air.
Provide regular updates on corporate travel emissions and progress toward targets. Transparency builds accountability and demonstrates that leadership takes sustainability seriously. Share success stories and best practices through internal channels, allowing employees who’ve discovered effective approaches to inspire their colleagues.
Education is essential. Many travellers don’t intuitively understand the carbon implications of their choices. Provide decision trees, training modules, and accessible guidance that makes sustainable choices obvious and easy. Your TMC should support accessible bookings for employees with additional needs, ensuring sustainability efforts are inclusive.
Measure, report, and improve
What gets measured gets managed. Include all travel, air, rail, ground transportation, and accommodation, in your Scope 3 emissions reporting. Track metrics that reveal both current performance and opportunities for improvement. Percentage of trips under 500km completed by rail. Direct versus indirect flight ratios. Economy versus business class bookings. Percentage of ground transport using EVs or hybrids. Estimated CO₂ savings from sustainable choices.
Non compliance with sustainable travel guidelines should be recorded and reviewed quarterly. Use data analytics to identify patterns, high emission routes, and travellers with elevated carbon footprints. This enables targeted interventions rather than blanket restrictions.
Encourage post trip feedback focusing on sustainability. Insights into barriers, whether that’s inadequate rail connections, EV charging anxiety, or booking platform limitations, help identify practical improvements. Continuous refinement based on real traveller experience distinguishes effective programmes from well intentioned but static policies.
Building a sustainable travel programme requires commitment across the organisation, from executive sponsorship to individual traveller choices. But the evidence from organisations that have made this journey is clear: sustainability and business effectiveness reinforce each other. Lower emissions often mean lower costs. Thoughtful travel planning improves productivity and wellbeing. And genuine environmental responsibility increasingly determines whether customers and talent choose to work with you.
The frameworks exist. The tools are available. The business case is compelling. The only question is whether your organisation will lead or follow.
