The era of small regional jets dominating service to America's secondary airports is beginning to fade. Across the United States, airlines are increasingly deploying larger mainline aircraft on routes that were once considered too small to support them. In recent months, both American Airlines and United Airlines have expanded Airbus A319 operations into smaller cities that traditionally relied on Bombardier CRJ and Embraer regional jets.
The trend became especially noticeable this spring with Airbus A319 appearances in markets such as Flagstaff Pulliam Airport and Appleton International Airport. For passengers, the upgrades bring larger cabins, more premium seating, and improved onboard amenities.
Flagstaff recently reached a historic milestone when American Airlines introduced the airport's first-ever scheduled Airbus A319 service. According to reporting from KJZZ Phoenix, the new flights replaced smaller CRJ regional jets operating between Flagstaff and Dallas/Fort Worth International Airport.

The switch is particularly notable because Flagstaff Pulliam Airport sits at roughly 7,000 feet above sea level, where higher elevation and warmer temperatures can affect aircraft performance. Regional jets have historically been common at the airport due in part to operational considerations associated with high-altitude airports.
Airport leaders and local officials view the move as a sign of growing demand in northern Arizona. Mainline service often indicates stronger long-term confidence from airlines, and the introduction of Airbus operations places Flagstaff among a growing number of smaller US airports now seeing larger narrowbody aircraft regularly.
Brian Gall, Flagstaff airport director, said: This Airbus A319 is going to be our first mainline aircraft, meaning the first aircraft that is actually owned and operated by American Airlines, and even has like an American Airlines call sign while it's in the air.

At Appleton International Airport in Wisconsin, aviation enthusiasts recently spotted A319 aircraft from both American and United Airlines operating flights typically handled by regional jets. For Appleton travelers, the use of Airbus aircraft represents a noticeable improvement in comfort and capacity.
Compared with CRJ regional jets, mainline narrowbody aircraft offer significantly more seats and improved performance on high-altitude routes.
The shift towards mainline aircraft on smaller routes reflects changing economics and passenger demand. Airlines are responding to growing consumer expectations for more comfort and amenities on shorter flights.

The shift towards mainline aircraft on smaller routes reflects changing economics and passenger demand.
