CarbonSkyIndex
SJC
BFI

San Jose → Seattle

1h 48m avg · 703 miles · 611nm · Recently active route — first recorded March 2026

218.3t CO₂ · Last 30 DaysTypical

Last updated March 31st 2026 at 9:35 AM UTC

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Viewing period:
Compared to: preceding 30 days · 30 Jan 2026 – 1 Mar 2026
1 Mar 2026 – 31 Mar 2026·vs 30 Jan 2026 – 1 Mar 2026
Route Impact Summary
Total CO₂
218.3tons
Flights
30flights
Avg CO₂/Flight
4.3tons
CO₂/nm
0.0070t CO₂/nm
Fuel Burned
15Kgallons
218.3 tons CO₂ in selected period
Emissions spike detected
Emissions 152% above route average on 5 Mar

Route Patterns

Predominantly owner-operated — 73% of flights are owner-operated aircraft

218.3t
Total CO₂
3.8t
Avg CO₂/flight
57
Flights
Operator Profile
Charter
27%4 flights13.6t
Owner
73%11 flights30.5t

Charter/owner data available for 26% of flights (42 unclassified)

Top Aircraft Models
Bombardier Challenger 30031.4t CO₂
8 flights · avg 3.9t/flight · 14%
Cessna Citation Longitude31.0t CO₂
8 flights · avg 3.9t/flight · 14%
Cessna Citation CJ423.0t CO₂
9 flights · avg 2.6t/flight · 11%
Gulfstream GIV21.4t CO₂
3 flights · avg 7.1t/flight · 10%
Embraer Phenom 30017.7t CO₂
7 flights · avg 2.5t/flight · 8%
📍International route·medium-haul route · 611nm

Spikes

Significant deviations from this route's baseline in the selected period.

CO₂ Above Baseline

15t

Signals Detected

1

Highest Severity

Medium

Emissions
Medium
New3 Mar 2026
Emissions spike on 3 Mar 2026 — 21.8t CO₂ vs route daily average of 7.0t (211% above)
21.8t CO₂ on 3 Mar 2026 — 211% above route average

Aircraft Flying This Route

Aircraft Flying This Route
N636DS·Cessna Citation CJ4
12.3t CO₂ · avg 2.5t/flight · Last seen 6 Mar 2026
N88MP·Cessna Citation CJ4
10.7t CO₂ · avg 2.7t/flight · Last seen 17 Mar 2026
N443DB·Bombardier Challenger 300
7.6t CO₂ · avg 3.8t/flight · Last seen 4 Mar 2026
N833QSCharter·Cessna Citation Longitude
7.4t CO₂ · avg 3.7t/flight · Last seen 6 Mar 2026
N318MMCharter·Cessna Citation XLS
6.2t CO₂ · avg 3.1t/flight · Last seen 5 Mar 2026

Recent Flights

57 total flights recorded

Showing most recent flights — not filtered by viewing period

Mar 30, 2026A7-CGEGulfstream G650·7.3t CO₂Above avg1h 44m→
Mar 30, 2026N578WZCessna Citation CJ3·2.7t CO₂Below avg1h 54m→
Mar 30, 2026N820QSCessna Citation Longitude·3.8t CO₂Typical1h 39m→
Mar 29, 2026N667FXGulfstream G650·6.7t CO₂Above avg1h 37m→
Mar 28, 2026N566FXBombardier Challenger 300·4.0t CO₂Typical1h 46m→
Mar 28, 2026N157QSBombardier Global 6000/6500·6.2t CO₂Above avg1h 31m→
Mar 27, 2026N236KRGulfstream GIV·7.1t CO₂Above avg1h 44m→
Mar 25, 2026N727QSBombardier Challenger 300·4.2t CO₂Typical1h 50m→
Mar 24, 2026C-FBELBombardier Challenger 600·4.3t CO₂Typical1h 51m→
Mar 23, 2026N1124XCessna Citation CJ2·2.2t CO₂Below avg1h 49m→
Showing 10 of 57 flights