Texas airports and their flight routes
This page puts the 4 Texas airports this site tracks side by side: DFW, DAL, HOU and IAH. Counting an airport on a route when it carries at least 5% of the route's passengers, together they cover 24 of the busiest US routes in 2025, 9 more than DFW alone.
The airports
An airport counts on a route when it carries at least 5% of the route's passengers, the same rule as the airport pages. Smaller shares aren't counted, so an airport can have a few passengers on a route without it appearing here. "Routes" is how many of the tracked routes each airport counts on. "Only here" is how many of those have no other airport on this page at 5% or more. This covers the Texas airports with their own airport page, not every airport in the state.
| Airport | Routes | Only here |
|---|---|---|
| Dallas/Fort Worth International Airport (DFW) | 15 | 1 |
| Dallas Love Field (DAL) | 14 | 0 |
| William P. Hobby Airport (HOU) | 10 | 0 |
| George Bush Intercontinental Airport (IAH) | 10 | 0 |
Where the airports overlap
23 of the 24 routes have more than one of these airports with at least 5% of their passengers, and 1 have just one. On Los Angeles to Dallas-Fort Worth, 2 of them clear that share: DAL and DFW.
- DFW is the only airport here with at least 5% of one route: Dallas-Fort Worth to Seattle.
Flight CO2 across these routes
The lowest-CO2 route here is Dallas-Fort Worth to Austin, at 51 kg per passenger over 190 miles. The highest is Dallas-Fort Worth to Seattle, at 211 kg over 1,660 miles. Longer trips burn more fuel, so this range shows how far people fly, not which airport is cleaner.
Every route in one table, 2025
Busiest first. Each route appears once, with the airports on this page that carry at least 5% of its passengers. CO2 is per passenger, one way, for the whole route across all its airports.
How these routes have changed
24 of these routes also have an earlier year on file. The biggest changes are below, each against that route's own earlier year. They describe the whole route, not one airport.
- Dallas-Fort Worth to San Francisco: 227 kg per passenger in 2019, 193 kg in 2025 (15% lower), on a route of the same length, 1,458 miles.
- New York to Houston: 231 kg per passenger in 2019, 197 kg in 2025 (15% lower), on a route of the same length, 1,412 miles.
- Atlanta to Houston: 133 kg per passenger in 2019, 116 kg in 2025 (13% lower), on a route of the same length, 692 miles.
Sources and limits
Source: US Bureau of Transportation Statistics (BTS), T-100 traffic and Schedule T-2 fuel filings; US EPA jet-fuel CO2 factor. See the route calculation method, route dataset and airport dataset.
Which state an airport is in comes from Wikidata, traced from each airport's location up to the state, retrieved 2026-11-06. Each step below links to the saved Wikidata record.
- DFW: Dallas/Fort Worth International Airport > Tarrant County > Texas.
- DAL: Dallas Love Field > Dallas > Denton County > Texas.
- HOU: William P. Hobby Airport > Houston > Harris County > Texas.
- IAH: George Bush Intercontinental Airport > Houston > Harris County > Texas.
The airline filings don't split fuel by airport. The CO2 figures cover every airport on a city pair, so they can't show how switching airports changes emissions. Selected and rounded airport shares aren't added into state passenger or emissions totals. Fuel burned only is counted, without non-CO2 warming effects.
Compare another state: California, Florida. Return to the state index.