Two central Illinois airports will add new, nonstop flights in August, officials said Tuesday.

Discount air carrier Allegiant Air plans to begin flying twice a week between Champaign’s Willard Airport and Las Vegas, while Northwest Airlines will resume daily flights between Peoria and Detroit.

Allegiant said in a news release that it plans service on Thursdays and Sundays from Willard, which is in Savoy, just south of Champaign. Service will begin Aug. 16.

The airline’s Web site says it uses MD-80s, which are full-size jets. Service at Willard now is limited to flights aboard smaller, regional jets between Champaign and Chicago, Dallas and Detroit.

“If this venture is as successful as we anticipate, this will be just the first of several new destinations,” airport director Gene Barton said in the release.

Las Vegas-based Allegiant plans introductory one-ways fares starting at $79, according to the release. The airline now flies b etween Peoria and Las Vegas, with one-way fares starting at $109, according to its Web site.

Beginning Aug. 21, Northwest will offer two daily roundtrip flights between the Greater Peoria Regional Airport and Detroit, one of its three U.S. hubs, the airline said in a statement. Service between the two cities was dropped in 2003.

Eagan, Minn.-based Northwest says the restored service will use Canadair regional jets, seating about 50 passengers. One-way fares will be $171, according to the airline’s Web site.

The Peoria-to-Detroit flights will offer central Illinois travelers “convenient connections to destinations throughout North America, Europe and Asia,” Northwest vice president Tom Bach said in a statement.

Northwest is a member of an airline alliance that serves more than 900 cities in 160 countries.