Almost all airlines in the United States operate from hubs.  Going from West to East, they are (in no specific order), Phoenix, Salt Lake City, Denver, Dallas / Fort Worth, Houston, Minneapolis / St. Paul, Chicago, Detroit, Cincinatti, Memphis, Atlanta, Cleveland, Philadelphia, and NYC.  There are a few other cities that some might argue are hubs but which I think are more “focus” cities than the above cities.

 

One way airlines have reorganized themselves to meet the cost pressures of non-deregulation on the costs side of the airline industry is to simply start “connection” and/or “feeder” airlines or to contract with those airlines.  Some examples are American Eagle, Mesa Airlines, Comair, Compass and Express Jet.  There are others too.  These airlines fly regional aircraft (regional jets and turbo-prop aircraft) on behalf of the mainline airlines.   Unions permitted these airlines by getting “scope” clauses in the contracts that limit the size of the aircraft to be operated. 

 

Often those scope clauses originally limited airlines to flying regional aircraft that had 50-odd seats or less.  What they didn’t do was limit the kind of flying such aircraft might be asked to do.   As things evolved post-1978 deregulation, airlines began to establish large hubs with multiple banks of flights each day.  They did so in order to “concentrate” their operations and take advantage of economies of scale.   Over time, mainline aircraft departing from a hub either went to other hubs or to larger 1st and 2nd tier cities.  Mainline aircraft stopped serving the smaller third tier cities (for example Des Moines or Jackson, MS.)  It never occured to unions to limit both scope and distance in those contracts because originally it was assumed that regional aircraft couldn’t serve route sectors of much more than 200 to 300 nm. 

 

Instead, mainline airlines used their feeder airlines to pick up traffic in those cities and carry it to a hub where the passenger then transferred to a mainline aircraft or another regional flight to get to their final destination.  For instance,  a passenger might fly American Eagle from Des Moines to Chicago, transfer to an American Airlines flight using mainline aircraft and continue on to a final destination such as Los Angeles.  

 

Prior to 1978 deregulation, American Airlines might have flown a route from Chicago to Los Angeles with intermediate stops in Des Moines and, say, Salt Lake City.  Remember this is a hypothetical example.  While hubs were beginning to develop or had developed, those entities really resembled what we call focus cities today.  It was a concentration of traffic and opportunity to rotate aircraft through maintenance facilities but it wasn’t a fortress hub that we see in places such as DFW or MSP today.

 

Over time, new aircraft such as regional jets that had greater capacity and speed than original “feeder” aircraft such as the EMB Brasilias or SAAB 340 aircraft were introduced.  These regional jets were capable of mainline aircraft speeds and altitudes and were capable of flying route segments in excess of 400 nautical miles.  Since the cost structure for such aircraft was an order of magnitude less than that for mainline service, airlines began to realize that they could use these aircraft to serve routes that contained a lot of O&D traffic for more point to point flying. 

 

Suddenly, American Eagle wasn’t just serving cities from DFW that were in Texas and surrounding states.  With regional jets, it began serving medium haul, thin traffic routes from DFW.  One example is the one I gave yesterday:  DFW to MKE.   That route has a lot of O&D traffic (Origin and Destination) but very little connecting traffic.  What that means is that people flying from MKE to DFW were terminating their trip at DFW instead of necessarily continuing on to another destination and vice versa.  If a MKE passenger wanted to get to Denver, they would fly either to Chicago or MSP to connect or possibly direct on a United Airlines “connection airline”. 

 

The feeder/connection airlines evolved into the “point to point” service provider for small to medium markets.  The reason is that airlines can only afford the flight crew labor costs for routes where the yield (profit from revenue) justified those costs.  The only way to find that yield is to concentrate flights through hubs.  One example, again, is DFW.  American Airlines “feeds” traffic from all over its network (including American Eagle’s network) into DFW where they “concentrate” that traffic and redistribute it to other routes.  This means that those routes load factors remain very high for each flight. 

 

On the surface, that sounds efficient.  However, there are some underlying factors that reveal it to be inefficient to operate such hubs.  First, it means that you have to schedule your traffic in banks of flights.  You want your flights to arrive at about the same time and then take off again at about the same time.  In order to manage that, your departure times at outlying stations may have to be excessively inconvenient to passengers.   Your airport service staff tends to work in concentrations with excessive idle time in between banks of flights.  You still have to pay them and they remain there because you service large banks of flights at one time.  An airline must have that staff in place over the full duty period to accomodate those peak periods.

 

Such hubs also tend demand fleets that are largely homogenized.  American Airlines, for instance, standardized on the MD-80 for these flights (and now is doing so on the B737-800) and therefore has to find routes that fit the aircraft instead of aircraft that fit the routes.  Because they must fill so many seats on mainline routes to make a profit, it drives them to feed more and more traffic into the hubs.

 

Hubs also can cause system wide service disruptions.  A bad weather day in Chicago can wreck two major legacy carriers systems (United and American Airlines) for multiple days because any disruption ripples outward through the whole system.  Since all flights go to or depart from the hub, there is no flexibility to “route around” the problem city.  

 

All of those issues inhibit a legacy carrier from earning long term profits and they haven’t earned reliably for over 20 years now. 

 

The best example of how best to operate in today’s airline market is, no surprise, Southwest Airlines.  While they do have several cities that look and feel like hubs, they really aren’t when compared to other airlines.  They are focus cities.  Those focus cities permit some concentration but they really exist to provide some operational flexibility and maintenance. 

 

Southwest Airlines focuses on flying point to point routes and high frequency commuter flights.  If you try to get from one city to another on Southwest’s system, you are very likely to fly there direct and in many cases non-stop.   The percentage of traffic on flights from focus cities that is “connecting” is relatively small compared to legacy airlines. 

 

When a flight from Southwest Airlines departs DAL (Dallas Love Field) for ABQ (Albuquerque), it isn’t coming back that day most likely.  Instead, it will continue on to, perhaps, Phoenix and then to Portland where it will turn and head to Los Angeles and then, maybe, to Denver.  The plane  goes through 3 focus cities but at all times it is carrying O&D traffic primarily. 

 

That point to point system with focus cities permits them to offer highly convenient flights that fly direct (in other words, a passenger doesn’t have to get off the plane and board another one) and they get a higher utilization rate out of both the aircraft and crew because they aren’t sitting at hub for 1 to 2 hours waiting for their flight to depart again.  Instead, Southwest crews do fast turnarounds at focus cities (20 to 40 minutes) and depart for still another city.  Southwest not only gets high utilization from their aircraft but they also get high utilization from their flight crews. 

 

Southwest Airlines’ crews are paid competively and even generously but the airline also gets far more productivity from them in a given duty period.   Ironically, Southwest crews also fly less fatiguing schedules overall and spend more nights at home than most other aircrews.   Southwest captains earn as much or more than any other Boeing 737 captain but because they negotiate not just raises but flexibility in their contracts, their standard of living is quite a bit higher than it would be at most legacy carriers.   They offer more productivity in return for working an easier duty period at a competitive salary. 

 

They also don’t fly small commuter aircraft and they don’t avoid flying to 3rd tier markets.  Southwest flies B737 equipment to cities such as Indianapolis, Odessa, Corpus Christi and Brimingham.  Every other airline serves those markets with primarily regional jets and Southwest manages to earn more profit flying to those same cities using mainline aircraft that is more than 100% larger.   Not because their crews are “cheaper” but because their crews (and their unions) bargain for more than just money.  It’s a competitive negotiation with real give and take and, as a result, Southwest gets high productivity without working their crews longer hours, bad morale or high turnover. 

 

Next we’ll look at why seemingly “fair” fares can’t earn real profits for most US carriers. 

Filed under: Deregulation, Trivia by ajax