US discount carrier Spirit Airlines has announced that it will introduce two daily nonstop flights between Las Vegas and Portland, Ore., in the fall.

The flights on the route will begin effective September 22, 2011. With the introduction of the flights, the airline will operate an average of 16 daily flights to six destinations.

The Spirit Airlines will be promoting a limited number of US$9 fares to customers, who are members of the airline’s US$9 Fare Club, on the new route.

The membership to the airline’s US$9 Fare Club costs US$60 annually, and offers members deep discounts on some flights.

The travel time between Las Vegas and Portland will take two hours. The flights from Portland will depart at 7.30 am and 6.10 pm, while the return flights leaving Las Vegas will be at 3.30 pm and 8.55 pm.

The Spirit Airlines had four daily flights to Las Vegas and Portland a year ago.

The airline also has nonstop routes to Detroit, Los Angeles International Airport, Dallas-Fort Worth International, Chicago’s O’Hare International and Fort Lauderdale, Fla., to Las Vegas.

The Spirit Airlines mostly operate flights on the East Coast and to the Caribbean.