# Distance from Alton/St Louis (ALN) to Chengdu (CTU)

> 12,155 km · estimated flight time 15h · Ultra-long-haul route.

## Summary

- **Distance**: 12,155 km / 7,553 mi / 6,563 nm
- **Estimated flight time**: 15h
- **Heading**: 347° (north northwest)
- **Return heading**: 12° (north northeast)
- **Classification**: Ultra-long-haul
- **Type**: International (United States) → China
- **Intercontinental**: North America → Asia
- **Time difference**: +13h (When it's 10:30 in Alton/St Louis, it's 23:30 in Chengdu)
- **Elevation difference**: 1,082 ft (CTU is higher than ALN)

## Airports

### [St Louis Regional Airport (ALN)](https://www.flightduration.online/airport/aln-altonst-louis-st-louis-regional-airport/1ef266df-0e15-6d96-bfee-06bb2780ed98)

- City: Alton/St Louis, United States
- ICAO: KALN
- Timezone: America/Chicago
- Coordinates: 38.890000, -90.050000
- Elevation: 544 ft

### [Chengdu Shuangliu International Airport (CTU)](https://www.flightduration.online/airport/ctu-chengdu-chengdu-shuangliu-international-airport/1ef266e0-20d1-6f24-8403-06bb2780ed98)

- City: Chengdu, China
- ICAO: ZUUU
- Timezone: Asia/Shanghai
- Coordinates: 30.580000, 103.950000
- Elevation: 1,625 ft

## Route notes

This is an ultra-long-haul route, one of the longest in aviation. It requires wide-body aircraft with extended range capability such as the Airbus A350-900ULR or Boeing 777-200LR. Passengers should prepare for an extended flight with multiple meal services.

Time-zone information: When it's 10:30 in Alton/St Louis, it's 23:30 in Chengdu.
With a 13-hour time difference, expect significant jet lag.

## Related

- [St Louis Regional Airport (ALN)](https://www.flightduration.online/airport/aln-altonst-louis-st-louis-regional-airport/1ef266df-0e15-6d96-bfee-06bb2780ed98)
- [Chengdu Shuangliu International Airport (CTU)](https://www.flightduration.online/airport/ctu-chengdu-chengdu-shuangliu-international-airport/1ef266e0-20d1-6f24-8403-06bb2780ed98)
- [Flight duration calculator](/#calculator)