N399G
Cessna Citation CJ2
United States
BHM (Birmingham-Shuttlesworth International Airport, Birmingham)

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Viewing period:
Compared to: preceding 12 months · May 2024 – May 2025
May 2025 – Apr 2026·vs May 2024 – May 2025

Emissions Overview

6.0
Tons CO2 This Month
Typical1.0× avg for Citation CJ2
9.5
Tons CO2 YTD
Below Average0.6× avg for Citation CJ2
19.7
CO2 Tons Since 2025
Below Average0.2× avg for Citation CJ2
Emissions Intensity0.00t CO₂/nmBelow Average0.7× avg for Citation CJ2
17.0 tons CO2 in selected period

2026 pace: On track for approximately 29t CO₂ by year end · ↑ 179% vs full year 2025 (10t)

Flight Patterns & Behaviour

Activity broadly consistent with prior period — averaging 1.4t CO₂/month

1.4t
CO₂/month
2.2t
Avg per flight
7
Distinct routes
Moderately Concentrated3 routes account for 52% of total emissions
Highest emission route
Allentown → Birmingham
2.8t CO₂ total · 0.0041t CO₂/nm
🇺🇸United States·16202 aircraft tracked·Ranked 1st by emissions among 109 countries·0.1× country averageBelow Average

Subject to FAA oversight — no mandatory carbon reporting for private aviation

What's ChangedCompared to prior equivalent period
Emissions
Prior data unavailable
Intensity
Prior data unavailable
New Routes
7
15t CO₂ combined
Dropped Routes
1
Prior period only
Avg per Flight
Prior data unavailable
Flight Count
Prior data unavailable

Route and airport counts may include data processing artefacts.

Spikes

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

CO₂ Above Baseline

18t

Signals Detected

5

Highest Severity

High

Aircraft
High
New12 May – 18 May 2025
Elevated activity period · 2 flights in 6 days vs baseline of 0
Contributed approximately 5t CO₂ to period total — 34% of period emissions
Aircraft
High
New6 Feb – 19 Mar 2026
Elevated activity period · 3 flights in 41 days vs baseline of 1
Contributed approximately 5t CO₂ to period total — 34% of period emissions
Aircraft
Medium
Historical14 May – 26 Jun 2025
43-day inactive period
2.0t CO₂ in the 7 days following resumption
Aircraft
Medium
Historical26 Jun 2025 – 12 Feb 2026
231-day inactive period
3.3t CO₂ in the 7 days following resumption
Aircraft
Medium
Historical15 Feb – 10 Mar 2026
23-day inactive period
1.9t CO₂ in the 7 days following resumption
Recent Flights
Mar 19, 20262.8t CO₂
KSATSan Antonio
KBHMBirmingham
743 miles2h 12m
Mar 10, 20261.9t CO₂
KBHMBirmingham
KFCINorth Chesterfield
583 miles1h 35m
Feb 15, 20262.0t CO₂
KBHMBirmingham
KVNCVenice
516 miles1h 37m
Feb 12, 20261.3t CO₂
KCDKCedar Key
KBHMBirmingham
375 miles1h 10m
View Details
Jun 26, 20252.0t CO₂
KOKCOklahoma City
KTCLTuscaloosa
589 miles1h 41m
View Details
May 14, 20252.8t CO₂
KABEAllentown
KBHMBirmingham
791 miles2h 16m
View Details
May 12, 20252.4t CO₂
KABEAllentown
CYPDPort Hawkesbury
787 miles1h 55m
View Details
Jan 30, 20252.7t CO₂
KBHMBirmingham
KDALDallas
585 miles2h 9m
View Details
Top Airports by Emissions
Birmingham

Birmingham

KBHM

Total CO₂

10.8t

Total Visits

5

Avg CO₂/visit

2.2t

May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Allentown

Allentown

KABE

Total CO₂

5.2t

Total Visits

2

Avg CO₂/visit

2.6t

May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
San Antonio

San Antonio

KSAT

Total CO₂

2.8t

Total Visits

1

Avg CO₂/visit

2.8t

May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Port Hawkesbury

Port Hawkesbury

CYPD

Total CO₂

2.4t

Total Visits

1

Avg CO₂/visit

2.4t

May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Oklahoma City

Oklahoma City

KOKC

Total CO₂

2.0t

Total Visits

1

Avg CO₂/visit

2.0t

May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Tuscaloosa

Tuscaloosa

KTCL

Total CO₂

2.0t

Total Visits

1

Avg CO₂/visit

2.0t

May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Page 1 of 2
Top Routes by Emissions
Allentown Birmingham

KABE to KBHM792 miles

Total Flights

1

Avg CO₂/Flight

2.8t

Total Emissions

2.8t CO₂

May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
San Antonio Birmingham

KSAT to KBHM743 miles

Total Flights

1

Avg CO₂/Flight

2.8t

Total Emissions

2.8t CO₂

May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Allentown Port Hawkesbury

KABE to CYPD787 miles

Total Flights

1

Avg CO₂/Flight

2.4t

Total Emissions

2.4t CO₂

May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Oklahoma City Tuscaloosa

KOKC to KTCL589 miles

Total Flights

1

Avg CO₂/Flight

2.0t

Total Emissions

2t CO₂

May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Birmingham Venice

KBHM to KVNC517 miles

Total Flights

1

Avg CO₂/Flight

2.0t

Total Emissions

2t CO₂

May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Birmingham North Chesterfield

KBHM to KFCI583 miles

Total Flights

1

Avg CO₂/Flight

1.9t

Total Emissions

1.9t CO₂

May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
Page 1 of 2