United has round-trip flights from Denver (DEN) to Omaha, Nebraska or El Paso (OMA, ELP) for $138, NONSTOP. Flights August to November. Departures on Tuesday and Saturday. Extended weekends available. Origin/Destination reversible.
United’s “Basic Economy” fares do not allow for a free carry-on bag. Only a personal item (like a small laptop bag) is free. Seats are randomly assigned for free prior to boarding. If you have the United Explorer credit-card, use the “free checked bag” perk.