# Distance from Alton/St Louis (ALN) to Seattle (SEA)

> 2,760 km · estimated flight time 4h · Medium-haul route.

## Summary

- **Distance**: 2,760 km / 1,715 mi / 1,490 nm
- **Estimated flight time**: 4h
- **Heading**: 301° (west northwest)
- **Return heading**: 98° (east)
- **Classification**: Medium-haul
- **Type**: Domestic (United States)
- **Time difference**: -2h (When it's 00:21 in Alton/St Louis, it's 22:21 in Seattle)
- **Elevation difference**: 111 ft (SEA is lower 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

### [Seattle-Tacoma International Airport (SEA)](https://www.flightduration.online/airport/sea-seattle-seattle-tacoma-international-airport/1ef266df-37e8-64a2-a4f1-06bb2780ed98)

- City: Seattle, United States
- ICAO: KSEA
- Timezone: America/Los_Angeles
- Coordinates: 47.450000, -122.310000
- Elevation: 432 ft

## Route notes

This is a medium-haul route that may be operated by either narrow-body or wide-body aircraft depending on demand. Passengers can expect a meal service on most carriers.

Time-zone information: When it's 00:21 in Alton/St Louis, it's 22:21 in Seattle.

## Related

- [St Louis Regional Airport (ALN)](https://www.flightduration.online/airport/aln-altonst-louis-st-louis-regional-airport/1ef266df-0e15-6d96-bfee-06bb2780ed98)
- [Seattle-Tacoma International Airport (SEA)](https://www.flightduration.online/airport/sea-seattle-seattle-tacoma-international-airport/1ef266df-37e8-64a2-a4f1-06bb2780ed98)
- [Flight duration calculator](/#calculator)