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KEMBA GBFXT
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Mombasa to Felixstowe freight CO2 emissions

One tonne of cargo shipped Mombasa (KEMBA) to Felixstowe (GBFXT) by sea emits 93 kg CO2e well-to-wake at GLEC v3.2 default factors. The same tonne by air emits 4,377.6 kg — roughly 47x the sea number.

Lane noteEast African gateway to North Europe via Suez (or Cape during Red Sea disruptions). Mombasa horticulture exports run a significant air-cargo share — Kenyan cut flowers reach UK supermarkets in 24-36 hours by air.

Per-tonne CO2e by mode

Sea freight

Container ship 4,000-7,000 TEU

93
kg CO2e
Distance
12,400 km
Factor (WTW)
7.5 g CO2e/tkm
Per shipment
1 t × 12,400 km
Factor source
GLEC v3.2 container 5,000-8,000 TEU (Post-Panamax, WTW)

Air freight

Long-haul belly cargo

4,377.6
kg CO2e
Distance
7,200 km
Factor (WTW)
608 g CO2e/tkm
Per shipment
1 t × 7,200 km
Factor source
GLEC v3.2 long-haul belly cargo allocation (WTW)

Mode comparison

On the Mombasa to Felixstowe lane, air freight emits about 47 times more CO2e per tonne than sea freight at GLEC v3.2 defaults. The gap is driven by the WTW factor difference between long-haul belly cargo (608 g CO2e/tkm) and a Container ship 4,000-7,000 TEU (7.5 g CO2e/tkm), partly offset by the shorter great-circle air routing.

Try this in the calculator

These numbers are GLEC v3.2 defaults at 1 tonne. Change weight, vessel class, or load factor in the calculator and see the per-mode CO2e update under ISO 14083:2023 data quality tiers.

Methodology references

Need primary-data emissions for Mombasa to Felixstowe?

The EcoFreight API ingests AIS, bunker delivery notes, and shipment manifests to return ISO 14083 Tier 3 primary-data numbers for the same lane. Free tier covers 1,000 calculations per month.