Avelo Airlines will add four routes from McKinney National Airport beginning Dec. 16-17, including its first service to Denver and new flights to Atlanta, Nashville and New Orleans, deepening its bet on the Dallas-area airport as the sole carrier operating there.

The new routes will run at frequencies between twice and four times weekly. They build on McKinney's commercial launch on Nov. 11, when Avelo begins nonstops to Florida destinations and Las Vegas — five initial cities in total. By year-end, the airline will base three Boeing 737-800s at the field, each configured with 186 seats.

McKinney National Airport (DTX) sits roughly 35 miles from both Dallas/Fort Worth International and Dallas Love Field, the hubs dominated by American Airlines and the operating base of Southwest Airlines, respectively. Avelo's play is straightforward: draw passengers in the northern Dallas suburbs who would otherwise face a long drive to either airport, using an airfield with minimal congestion and, for now, no competing scheduled service.

No other carriers have committed to DTX. That gives Avelo a monopoly position at the facility for the foreseeable future, but it also means the airline carries the full cost of establishing commercial operations at an airport with no incumbent passenger infrastructure. The FAA issued McKinney's commercial certificate on Sept. 26, clearing the regulatory path barely six weeks before the first scheduled departure.

The December expansion brings Avelo's initial McKinney network to nine destinations, spanning Florida leisure markets, Las Vegas and now four cities closer to home: Atlanta, Denver, Nashville and New Orleans. The mix reflects the carrier's hybrid approach — leisure-heavy flying anchored by point-to-point routes that bypass both DFW and DAL.

For Boeing, the McKinney base adds another three 737-800s to Avelo's deployed fleet, aircraft drawn from the secondary market rather than new deliveries. The -800s seat 186 passengers, consistent with Avelo's dense single-class configuration.

The stakes for Avelo are considerable. The airline has shuffled its network repeatedly since launching in 2021, exiting West Coast bases and consolidating operations east of the Mississippi. McKinney represents its most aggressive push into a major metro area's secondary airport since that restructuring, and the speed of the December additions — four new cities within five weeks of the base opening — signals an intent to establish the station quickly rather than ramp gradually.

Utilization of three aircraft across nine destinations will require careful rotation planning, particularly given the twice-to-four-times-weekly frequencies on the new routes. Thin schedules at secondary airports carry schedule-resilience risk: a single aircraft-on-ground event at DTX, with no spare based there, could cascade across the network.

McKinney's certificate and Avelo's launch also test a broader proposition: whether suburban reliever airports can sustain scheduled low-cost service in large metro areas when the primary hubs remain comparatively accessible. If Avelo's loads hold through the winter, expect the carrier to weigh additional aircraft and destinations at DTX in 2026; if they do not, McKinney risks joining the list of secondary-airport experiments the ULCC has already abandoned.