IAH to MSY: Distance and Flight Time

How far is it from Houston to New Orleans?

The great-circle distance between George Bush Intercontinental Airport (IAH) and Louis Armstrong New Orleans International Airport (MSY) is 489 km (304 mi, 264 nautical miles). That is the straight-line distance; a real flight is a little longer because of air-traffic routing.

How long is the flight from IAH to MSY?

A nonstop flight typically takes about 1h 5m. This is an estimate from the distance; actual block times depend on the aircraft, winds and the exact routing. MSY is roughly east of IAH.

How is the IAH to MSY route written in code?

The pair is written IAH-MSY in IATA codes and KIAH-KMSY in ICAO codes, the form used on a flight plan. George Bush Intercontinental Airport is IAH (KIAH), Louis Armstrong New Orleans International Airport is MSY (KMSY).

Both ICAO codes start with K, the prefix ICAO assigns to the contiguous United States, so this is a route inside one ICAO region. How ICAO prefixes are laid out.

The two fields sit at almost the same height, within 93 ft (28 m) of each other.

Airlines flying IAH to MSY

1 airline appear on this route in the open route dataset, 1 of them still listed as active. Each row gives the IATA code, the ICAO code and the radio callsign, which is what an air traffic controller hears:

A further 3 carriers sell this pair as a codeshare without operating it: AC, LH, TK.

Route and carrier data comes from the OpenFlights open dataset, regenerated here on 3 July 2026. It is a historical snapshot of scheduled connections, not a live schedule, and it includes codeshare listings, so some carriers shown may no longer operate the route or exist. How we build this · Data and sources.

Frequently asked questions

Related routes

Other routes from Houston (IAH):

Other routes from New Orleans (MSY):

IAH airport code · MSY airport code · Busiest airports worldwide