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Emission factor specification

Retrieved 2026-08-25

Flights

DEFRA / DESNZ

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Emission factor
0.0842
kgCO₂e/passenger.km
Data grade
Secondary
Edition
—
Source
UK DEFRA
DEFRA / DESNZ

1Factor specification

Values are per kgCO₂e/passenger.km

Product
Flights
Activity name (original)
Flights, International, to/from non-UK, Average passenger, Without RF
Factor value
0.0842 kgCO₂e/passenger.km
Unit basis
passenger.km
GWP
AR5
Calculation approach
AR5 GWP100
Method
Tank-to-Wheel (TTW)
Year published
2025
Region
United Kingdom of Great Britain and Northern Ireland (the) · GBR
Dataset edition
2025

2Where it sits in the industry spread

46.7% of 6 · smaller than the median

UK DEFRA · 단위 passenger.kmMiddle 50% band
0.0278Median 0.0940250.14861

Compared against 6 factors in the same unit (passenger.km). Product families may be mixed, so treat it as indicative only. Measuring concrete and steel sheet with the same ruler says little.

3Breakdown by gas

1 items provided by the source

CO₂e total
0.0842

4Factors to compare

0 under the same product · 5 with a similar value

Product · manufacturerRelationEditionFactor (kgCO₂e/passenger.km)vs this factor
Bus · DEFRA / DESNZSimilar value—0.10385▲ 23.3%
Ferry · DEFRA / DESNZSimilar value—0.1127▲ 33.8%
Taxis · DEFRA / DESNZSimilar value—0.14861▲ 76.5%
Rail · DEFRA / DESNZSimilar value—0.03546▼ 57.9%
Rail · DEFRA / DESNZSimilar value—0.0278▼ 67.0%

Notes

  1. 1)The value is as published by UK DEFRA; we do not alter it. UK Government GHG Conversion Factors
  2. 2)Factor values in the table are unified to kgCO₂e for comparison. The original unit is in "Factor specification".
  3. 3)Even with several editions the value often stays the same. "Checked and unchanged" is an answer too.
  4. 4)One of 13,844 factors from public sources. ecoinvent, EXIOBASE and IEA factors bar redistribution, so they aren't here. See why
Source: UK DEFRA (DEFRA / DESNZ), Dataset edition 2025, retrieved 2026-08-25. View original