
Houghton County Memorial Airport (IATA: CMX, ICAO: KCMX, FAA LID: CMX) is a county-owned public-use airport located four nautical miles (5 mi, 7 km) southwest of the central business district of Calumet, a village in Houghton County, Michigan, United States. The airport is situated in the unincorporated community of Oneco in Franklin Township, near the village of Calumet on the Keweenaw Peninsula in northwest of the Upper Peninsula of Michigan. A limited scheduled commercial service is available, subsidized by the Essential Air Service program. In addition, Royale Air Service provides a seaplane service to Isle Royale National Park depending on traveler demand. It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2021–2025, in which it is categorized as a non-hub primary commercial service facility. The airport received $1.1 million from the US Department of Transportation in 2020 as part of the CARES Act to help mitigate the effects of the COVID-19 pandemic.

47.168°N, 88.489°O · 334 m s. n. m. (1.095 ft)
Lengths and surfaces from the public OurAirports register; open runways only.
Approach
Common traffic (CTAF)
Automated weather
Frequencies from the official publication: FAA NASR, AIRAC 01 OCT 2026, checked on Oct 16, 2026. They change with each amendment: not for navigation without checking the current AIP. See the official publication In MHz.
The first airfields in the Keweenaw Peninsula were, as common at the time, near the shoreline; several are known to have existed on both sides of the Portage Canal, with airmail and ad hoc passenger service to Chicago's Meigs Field. These fields could not accommodate increasingly larger aircraft in the post-WWII era, and their locations made them unsuitable for expansion. Houghton County Memorial Airport was commissioned at its current location in 1948, with air service on Wisconsin Central Airlines commencing a few months later via milk run service to Chicago and Detroit via many intermediate stops.
For the next sixty years, Wisconsin Central's corporate successors - sequentially, North Central Airlines, Republic Airlines, Northwest Airlink operated by Simmons Airlines, Mesaba Airlines, and Pinnacle Airlines, and Delta Connection - maintained regular passenger service, to varying combinations of Chicago, Detroit, and Minneapolis. Flights to Detroit usually included a stop at Marquette County Airport until 1999, and Sawyer International Airport from 1999-2003, when direct service to Detroit was cancelled in favor of exclusive service to Minneapolis.
Following the great recession in 2008-2009 and corresponding reduction in passenger traffic, Mesaba Airlines filed for subsidized service under the Essential Air Service program. Despite strong community support for Mesaba's service, the FAA instead selected Skywest Airlines, operating as United Express, making two daily flights to Chicago. On March 11, 2022, SkyWest announced its intention to withdraw from the airport (and 30 others), which would leave the airport with no scheduled passenger service. The airport rejected the airline's plans to reduce flight frequencies to the airport, however, and SkyWest continues to operate twice-daily flights, albeit with a much higher EAS subsidy.
From our own logbook: 39 aircraft documented between 2010 and 2025.
Types seen here
Airlines with documented aircraft
Busiest routes from here
A count of our own aircraft profiles, year by year, from the public United States flight records: it reflects what we have documented, not the airport’s total traffic.
Other airlines with direct routes
Airlines with current passenger routes from here, according to Wikipedia route tables cross-checked from both ends (October 2026).
Photo: Royalbroil · CC BY-SA 3.0 · view original
Data from OurAirports (public domain) · destinations and airlines from Wikipedia route tables (CC BY-SA, 2026), unless another source is given · profile and photo from Wikidata/Wikimedia Commons (CC0 / CC) · summary and history from Wikipedia (CC BY-SA).
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This page was last updated on October 16, 2026
APA
Vuelopedia. (2026, October 16). Houghton County Memorial Airport (CMX). Retrieved October 20, 2026, from https://vuelopedia.org/en/airport/CMX
MLA
“Houghton County Memorial Airport (CMX).” Vuelopedia, Fundación Poderia, 16 Oct. 2026, vuelopedia.org/en/airport/CMX. Accessed 20 Oct. 2026.
Chicago
Vuelopedia. “Houghton County Memorial Airport (CMX).” Fundación Poderia. Last modified October 16, 2026. https://vuelopedia.org/en/airport/CMX.
Harvard
Vuelopedia (2026) Houghton County Memorial Airport (CMX). Available at: https://vuelopedia.org/en/airport/CMX (Accessed: 20 October 2026).
BibTeX
@misc{vuelopedia_en_airport_cmx,
author = {{Vuelopedia}},
title = {{Houghton County Memorial Airport (CMX)}},
publisher = {Fundación Poderia},
year = {2026},
date = {2026-10-16},
url = {https://vuelopedia.org/en/airport/CMX},
howpublished = {\url{https://vuelopedia.org/en/airport/CMX}},
urldate = {2026-10-20},
note = {Accessed 2026-10-20}
}Wikipedia
{{cite web |url=https://vuelopedia.org/en/airport/CMX |title=Houghton County Memorial Airport (CMX) |website=Vuelopedia |publisher=Fundación Poderia |date=2026-10-16 |access-date=2026-10-20 |language=en}}