Business travel: travelling for work (by air)

Reducing travel or replacing travel methods with less harmful alternatives, when travelling for work other than commuting to and from the office. When considering national or international travel by air, choosing less harmful alternatives could include:

  • Choosing a different method of travel by land or sea;  
  • Choosing a seat in a different class of seating, requiring less space per person and therefore using less fuel. 
  • Meeting from home, telecommuting rather than travelling. 

Measuring greenhouse gas emissions allows organisations and individuals to have numbers for carbon offsetting programmes or initiatives, if travelling is unavoidable. 

Figures factoring in RF (Radiative Forcing) should be used. Greenhouse gas emissions cause more damage to the environment at higher altitudes so the multipliers need to be higher than for other forms of travel.  

EN3.1

Business travel: travelling for work (by air)

Travel
Environment

Key Value

252 per tCO2e or 25.2p per kgCO2e

Carbon values in £2020 prices per tonne of CO2: central series for 2023 is 252£.  https://www.gov.uk/government/publications/valuing-greenhouse-gas-emissions-in-policy-appraisal/valuation-of-greenhouse-gas-emissions-for-policy-appraisal-and-evaluation

This headline value comes from the UK government Greenhouse Gas Conversion Factors  
https://www.gov.uk/government/collections/government-conversion-factors-for-company-reporting  

Bronze

Effort

Accuracy

Monetised value:

At the Bronze level, you should calculate the approximate mileage travelled by an average air passenger, by type of air travel, as each produces different levels of carbon emissions. 

Type of air travel includes: 

  • Domestic travel 
  • Short haul (to/from UK) 
  • Long haul (to/from UK) 
  • International (non-UK) 

For example, an average air passenger generates: 

  • 0.24587 kgCO2e per kilometre travelling on a domestic flight  
  • 0.19309 kgCO2e per kilometre travelling on a long-haul flight 

Calculate the distance between departure and arrival airports for approximate mileage travelled, then multiply by the carbon emissions equivalent per kilometre travelled on a standard class ticket.  

Consider factoring in hotel accommodation into your carbon emission calculations for business travel. They should be included in any Scope 3 reporting. Refer to UK government’s greenhouse gas reporting: conversion factors for hotel accommodation. 

Here’s an example

Using https://www.airmilescalculator.com/  to calculate air miles  

Travel from Manchester Airport to Chicago O’Hare = 6157 kilometres. 

1 km travelled = 0.19309 kgCO2e 

Total greenhouse gas emissions = 6157 * 0.19309 = 1,188.8551 kgCO2e 

 Total value of long haul flight = 1,188.8551 * 0.252 = £299.64 

Overnight accommodation in Chicago = 6.1 kgCO2e per night 

Refer to UK government’s most recent Greenhouse gas reporting: conversion factors
https://www.gov.uk/government/collections/government-conversion-factors-for-company-reporting  

 

Silver

Effort

Accuracy

Monetised value:

At the Silver level, you should calculate your approximate mileage, by type and class of air travel, as each class produces different levels of carbon emissions. 

As per the Bronze level, type of air travel includes: 

  • Domestic travel:  
  • Short haul (to/from UK):  
  • Long haul (to/from UK):  
  • International (non-UK):  

Depending on the type of flight, class of air travel can include: 

  • Economy 
  • Premium Economy 
  • Business Class 
  • First Class 

As per the Bronze level, include any overnight accommodation. 

HaulClasskg CO2e per passenger/pr km
Domestic, to/from UK Average passenger 0.27258
Short-haul, to/from UK Average passenger0.18592
Economy class 0.18287
Business class0.2743
Long-haul, to/from UK Average passenger0.26128
Economy class0.20011
Premium economy class0.32016
Business class0.58029
First class0.8004
International, to/from non-UKAverage passenger0.1758
Economy class0.13464
Premium economy class0.21542
Business class0.39044
First class0.53854

Here’s an example

Using https://www.airmilescalculator.com/  to calculate air miles  

Travel from Manchester Airport to Chicago O’Hare = 6157 kilometres. 

1 km travelled by business class =  0.42882 kgCO2e 

Total greenhouse gas emissions = 6157 *  0.42882 = 2,640.245 kgCO2e 

Overnight accommodation in Chicago = 6.1 kgCO2e per night. 

Total value of greenhouse gas emissions from a 3 night trip = (2,640.245 + (6.1 * 3)) * £0.252 = £669.95 

These are figures for 2022. Refer to UK government’s most recent Greenhouse gas reporting: conversion factors for the most up to date values:
https://www.gov.uk/government/collections/government-conversion-factors-for-company-reporting  

Gold

Effort

Accuracy

Monetised value:

At this level you should be measuring the actual mileage of each journey, by plane travel type and class. 

As per Bronze and Silver, include any overnight accommodation. 

Refer to UK government’s most recent Greenhouse gas reporting: conversion factors
https://www.gov.uk/government/collections/government-conversion-factors-for-company-reporting  

Value Type: Activity What's this?
UN SDG Categories:
  • Climate Action
What's this?
PN06/20 Categories:
    • MAC 4.1 Additional environmental benefits
    • MAC 4.2 Influence environmental protection and improvement
    • Policy Outcome 4: Effective stewardship of the environment
    • Theme 3: Fighting Climate Change
What's this?

Evidence

Measure Up focuses on empowering you to numerically measure the impact you’re having. We recommend that numeric reports are backed up with stories and other types of evidence to help illustrate, in human terms, the impact that’s being made on individuals.

We recommend seeking consent from participants in your intervention to collect and tell their story. This should include a little background on the participant, a summing up of life before the intervention, the human impact of the intervention, and the longer term (if known) impact on the person’s life outside of, and after, the intervention.

Providing photographs, audio recordings, video interviews or even artefacts from the intervention (for example, writing, paintings, music from creative interventions) can add more to the story, and convey the emotional impact of interventions more directly.

In some cases it’s appropriate to anonymise or abbreviate the personal information of case study participants. No story should be published or shared without the recorded consent of the individual(s) it concerns. Individuals continue to own the rights to their stories and if they request you stop sharing the story or making it available online you should do so promptly and without need for justification.

More help

We want to empower anyone to perform and improve their impact measurement – without needing a degree in economics.

If you need any more help, or just someone to do the legwork for you we can help signpost you to software, training and consultancy to help you get to grips with the impact you’re having and value you are creating.

Data Sources