Rankings / Airports / SJC

2025 flights

San Jose International Airport (SJC)

San Jose International Airport (SJC) carries at least 5% of the passengers on 10 of the 100 busiest US routes. On those routes about 6.8 million passengers flew through it in 2025, counting each route's airport split.

CO2 on the routes through SJC

The routes through SJC run from 71 kg of CO2 per passenger (San Francisco to Las Vegas) to 300 kg (San Francisco to Honolulu), with a middle of 119 kg.

Every route that uses SJC, busiest first
RouteFlown withShare through SJCkg CO2 per passenger
San Francisco to San DiegoSAN (31%)31%78
San Francisco to Las VegasLAS (28%)28%71
San Francisco to SeattleSEA (30%)30%119
Los Angeles to San FranciscoLAX (10%)10%75
San Francisco to DenverDEN (24%)24%136
San Francisco to PhoenixPHX (27%)27%107
Dallas-Fort Worth to San FranciscoDFW (19%), DAL (8%)27%193
San Francisco to PortlandPDX (25%)25%103
San Francisco to HonoluluHNL (17%)17%300
Chicago to San FranciscoMDW (6%), ORD (3%)9%235

Airport references

Source: US Bureau of Transportation Statistics (BTS), T-100 traffic and Schedule T-2 fuel filings; US EPA jet-fuel CO2 factor. Route calculation method.

Airlines on these routes

By passengers on the routes above, the largest are Southwest Airlines, United Airlines, Alaska Airlines, American Airlines, SkyWest Airlines and Frontier Airlines.

About these figures. The CO2 per passenger is for the whole city pair, so it covers every airport the route uses. The airline filings the figures come from don't split fuel by airport, so we can't say how a flight from SJC compares with one from a neighbouring airport. The share column is the part of the route's passengers that flew through SJC, from the same filings. How the figures are built.