John Glenn Columbus International Airport, identified globally by the CMH airport code, serves as the primary gateway for central Ohio. Located just six miles east of downtown Columbus, this facility has transitioned from a modest municipal hangar into a critical mid-sized international hub. As of mid-2026, the airport continues to see record-breaking passenger volumes, reflecting the rapid economic growth of the Columbus metropolitan area. For travelers and logistics professionals, understanding the nuances of CMH is essential for efficient movement through the Midwestern United States.

The historical origin of the CMH airport code

A frequent question among travelers is why the code for Columbus is CMH rather than something more intuitive like COL or CLB. The answer lies in the early days of aviation. When the airport was established in 1929, it was known as the Columbus Municipal Hangar. This original designation provided the letters for the IATA code that persists today.

Originally dedicated as Port Columbus International Airport, the site was a pivotal stop on the first transcontinental air-rail service. In 2016, the Ohio General Assembly passed legislation to rename the facility to honor astronaut and long-time U.S. Senator John Glenn. While the name on the terminal has changed to reflect this legacy of exploration, the CMH airport code remains a permanent fixture in global flight systems, anchoring the airport's identity to its historical roots.

Navigating the terminal and concourses

The current configuration of John Glenn International features a single terminal building divided into three distinct concourses: A, B, and C. Each concourse has its own security checkpoint, which is a critical detail for passengers to remember. Moving between concourses requires exiting the secure area and re-clearing security, so checking the departure gate on the CMH flight board is a necessary first step upon arrival.

Concourse A

Concourse A is primarily the home of Southwest Airlines. Given Southwest's significant market share in Columbus, this concourse is often the busiest in terms of foot traffic. It features seven gates and a selection of quick-service dining options. Travelers using this concourse generally find it straightforward to navigate, though peak morning hours can see longer queues at the dedicated security checkpoint.

Concourse B

As the largest of the three, Concourse B serves several major carriers including American Airlines, United Airlines, Spirit Airlines, and Air Canada. It contains the widest variety of amenities, including sit-down restaurants and retail shops. American and United maintain a strong presence here, connecting Columbus to major hubs like Dallas/Fort Worth, Chicago O'Hare, and Denver. The layout is linear, making it easy to find gates, though the walk from the security area to the higher-numbered gates can take several minutes.

Concourse C

Concourse C is the primary base for Delta Air Lines, Alaska Airlines, and Frontier Airlines. It also handles the majority of international arrivals that require customs clearance. While smaller than Concourse B, it offers a more relaxed atmosphere. For those with lounge access, the Club at CMH is located in this concourse, providing a quiet space for business travelers and frequent flyers to work or relax before their flights.

The 2029 vision: A new era for CMH

By 2026, construction for the new terminal at John Glenn International is a visible and significant part of the airport landscape. This multi-billion dollar project is designed to replace the aging current infrastructure with a modern, consolidated facility. The new terminal, scheduled for completion in 2029, aims to address the capacity constraints felt by the current three-concourse system.

The vision for the new CMH includes a single, centralized security checkpoint. This will eliminate the current inconvenience of being unable to move between gates post-security. Plans indicate a total of 36 gates, modernized baggage handling systems, and a significantly expanded parking garage with 5,000 spaces. For current travelers, this means navigating some construction zones around the airport perimeter, but the end result promises to elevate Columbus into a top-tier regional aviation center.

Ground transportation and parking logistics

Reaching the airport or departing from it is relatively efficient due to its proximity to the city center. However, choosing the right transportation mode depends on the duration of the trip and the desired level of convenience.

Ride-share and Taxis

Uber and Lyft operate extensively at CMH, with a designated pickup zone located on the arrivals level. Taxis are available 24/7 and offer a flat-rate structure for trips to downtown Columbus, typically costing around $25 to $30 before gratuity. The drive to the central business district usually takes between 10 and 15 minutes, depending on traffic conditions on I-64 or I-670.

Public Transit

The Central Ohio Transit Authority (COTA) provides bus service connecting the airport to downtown. This is a cost-effective option for budget-conscious travelers, with fares significantly lower than private transfers. The AirConnect service specifically serves the airport-to-downtown corridor, though it is advisable to check current schedules as frequency can vary during weekends or holidays.

Parking Options

Parking at CMH is categorized by proximity and price. The terminal garage offers the most convenience, with levels designated for short-term and long-term stays. For those looking to minimize costs, the Blue, Red, and Green economy lots provide shuttle service to the terminal. As of 2026, the automated parking systems have been upgraded to allow for pre-booking, which is recommended during peak holiday travel periods to ensure a spot in the preferred lot.

Airlines and nonstop destinations

The CMH airport code is a hub of activity for over 10 major airlines. Together, they provide nonstop service to more than 50 destinations across North America. This connectivity is a major driver for the local economy, attracting businesses and supporting the tourism sector.

  • Major Hub Connections: Daily flights to Atlanta (ATL), Charlotte (CLT), Chicago (ORD/MDW), and New York (JFK/LGA/EWR) allow for easy one-stop access to international destinations.
  • Leisure Routes: Seasonal and year-round flights to Florida destinations (MCO, TPA, FLL, RSW) and Las Vegas (LAS) are highly popular among local residents.
  • Western Expansion: Direct routes to Los Angeles (LAX), San Francisco (SFO), and Seattle (SEA) have increased in frequency, catering to the growing tech presence in the Columbus region.

While CMH primarily serves domestic routes, its customs facility allows for direct flights to international vacation spots like Cancun and Toronto. The airport’s management continues to pursue additional transatlantic opportunities, although these often depend on broader market trends and aircraft availability.

Passenger amenities and the travel experience

Modern travel through CMH is designed to be as stress-free as possible. The airport has made significant investments in digital infrastructure and passenger comfort over the last few years.

Digital Services

High-speed Wi-Fi is complimentary throughout the terminal. Charging stations are integrated into most seating areas, ensuring that devices remain powered for the duration of the journey. The airport's mobile-friendly website provides real-time updates on flight statuses, security wait times, and parking availability.

Dining and Shopping

While the current terminal has some limitations in space, it offers a respectable selection of local and national brands. From Ohio-based coffee roasters to standard fast-casual fare, there are options for various dietary needs. It is important to note that many dining establishments close shortly after the final scheduled departures, so late-night travelers should plan accordingly.

Accessibility and Family Services

John Glenn International is fully ADA-compliant. Wheelchair assistance can be arranged through individual airlines, and it is best requested at the time of booking. For families, the airport provides nursing rooms and family restrooms. There are also designated pet relief areas located both inside and outside the secure zones, catering to those traveling with service animals or pets.

Strategies for a smooth departure from CMH

To ensure a seamless experience when flying out of Columbus, certain strategies can be employed. While CMH is generally more manageable than massive hubs like O'Hare or Hartsfield-Jackson, it still experiences surges in traffic.

  1. Arrival Timing: For domestic flights, arriving two hours prior to departure is the standard recommendation. During early morning hours (5:00 AM to 8:00 AM), the security lines can grow quickly due to a high concentration of departing business flights.
  2. TSA PreCheck: Those with TSA PreCheck will find dedicated lanes at each concourse. This can significantly reduce wait times during peak periods. It is worth noting that CLEAR is not currently available at all checkpoints, so travelers should rely primarily on PreCheck for expedited screening.
  3. App Utilization: Downloading the app of the airline you are flying is the most reliable way to receive gate change notifications and mobile boarding passes. Since the concourses are separate, knowing your gate before you go through security is vital.
  4. Security Logic: Remember that if you have a long layover or arrive very early, you are restricted to the amenities within your specific concourse. If you wish to visit a restaurant in Concourse B but your flight leaves from Concourse A, you will have to clear security twice.

The economic impact of the airport

The CMH airport code represents more than just a travel point; it is an economic engine for the state of Ohio. The airport supports thousands of jobs, ranging from airline operations and security to retail and hospitality. The record passenger numbers seen in 2024 and 2025 indicate a robust demand for air travel in the region, driven by the presence of major corporate headquarters, the state government, and the Ohio State University.

As the city of Columbus continues to grow, the airport’s role in facilitating commerce and connecting the region to the global marketplace becomes even more critical. The ongoing investment in the new terminal is a testament to the long-term confidence in the region's trajectory.

Frequently asked questions about CMH

What is the official name of the airport? The official name is John Glenn Columbus International Airport. It was formerly known as Port Columbus International Airport.

How far is CMH from the city center? It is located approximately 6 miles east of downtown Columbus. A taxi or ride-share typically takes about 10-15 minutes.

Does CMH have international flights? Yes, CMH serves international destinations including Canada and Mexico, and it has on-site customs facilities.

Can I walk between concourses at CMH? Currently, you cannot walk between Concourses A, B, and C without exiting the secure area and passing through security again. This will be resolved with the opening of the new terminal in 2029.

What are the busiest times at the airport? Early mornings (weekdays) and Sunday afternoons are typically the busiest periods due to business travel and returning weekend travelers.

Final thoughts on flying through Columbus

Whether you are visiting for the first time or are a resident of central Ohio, John Glenn Columbus International Airport offers a relatively efficient and friendly travel experience. The CMH airport code stands as a symbol of the city's aviation heritage and its ambitious future. While the facility is currently in a state of transition with the construction of the new terminal, it remains a reliable and accessible hub for the millions of passengers who pass through its gates each year. By understanding the terminal layout, planning for parking, and staying informed about the ongoing modernization, travelers can make the most of their journey through this essential Midwestern gateway.