After a chaotic summer travel period, September's shoulder season should be a welcome reprieve for weary travelers.
With the transition to fall comes new flight routes. Here are some of the notable network enhancements being planned by major U.S. carriers this autumn.
Alaska Airlines
Alaska Airlines will expand service between Yakima and Seattle-Tacoma International Airport in Washington State on November 17. The carrier will also add service from Los Angeles to Guatemala City, Guatemala on December 14.
American Airlines
American Airlines will fly travelers to see their favorite college football teams in action this fall. Notable routes include Austin, Texas to Birmingham, Alabama; Nashville to Gainesville, Florida and Los Angeles to Eugene, Oregon.
The carrier is also expanding service on 10 routes from North Carolina's Charlotte Douglas International Airport (CLT) starting December 5. Destinations include Belize City, Belize; Cancun, Mexico; Curacao; Liberia, Costa Rica; Los Cabos, Mexico; Montego Bay, Jamaica; Puerto Plata, Dominican Republic; Punta Cana, Dominican Republic; San Juan, Puerto Rico and St. Croix, U.S. Virgin Islands.
Starting December 9, American will launch a new nonstop service to Cancun from Nashville and Cincinnati.

Avelo Airlines plane takes off from Hollywood Burbank Airport. (photo courtesy of Avelo Airlines)
Avelo Airlines
Budget carrier Avelo Airlines will make its Caribbean debut this fall when it launches twice weekly service between Connecticut's Tweed-New Haven Airport and Puerto Rico’s San Juan Luis Munoz Marín International Airport. The new flights will commence on November 15.
Delta Air Lines
Delta Air Lines will re-launch service to Curacao from Atlanta for the first time since 2010 starting December 16.
JetBlue
JetBlue is expanding service to the Caribbean this fall, connecting New York City's John F. Kennedy International Airport with Robert Llewellyn Bradshaw International Airport (SKB) in St. Kitts and Nevis starting November 2 and flying from JFK to Belize City, Belize beginning December 6.
Meanwhile, the carrier will commence flights from Boston to Grenada and connect Los Angeles with Nassau, Bahamas starting on November 4. JetBlue will also launch new Orlando to Raleigh, North Carolina service beginning November 2.

Southwest Airlines flight arriving at Austin–Bergstrom International Airport, Texas. (photo via Wikimedia Commons/Brett Spangler)
Southwest Airlines
Low-cost carrier Southwest Airlines will launch daily nonstop service between Long Beach, California and Albuquerque, New Mexico on September 5. Starting October 7, the carrier will offer seasonal service on Saturdays between Kansas City, Missouri and Montego Bay, Jamaica and Los Cabos, Mexico.
Meanwhile, Southwest's current service between Kansas City and Cancun, Mexico will operate daily starting October 5.
Spirit Airlines
Ultra-low-cost carrier Spirit Airlines will offer a new nonstop route to Las Vegas from Charleston, South Carolina starting September 7. The flight will operate five times weekly.

United Airlines plane. (photo via United Airlines Media)
United Airlines
Last month, United Airlines announced the addition of 127 new, nonstop flights for the upcoming college football season. More flights and larger planes will be flying to numerous college towns and cities, including Ann Arbor, Michigan; Knoxville, Tennessee and Columbus, Ohio, among others.
"We're committed to providing a best-in-class travel experience for our customers, whether they're traveling around the globe, or flying to see their favorite college football team play," Patrick Quayle, Senior Vice President of Global Network Planning and Alliances, said in a statement. "We're pleased to deliver a schedule this season that makes it easy for fans to come together and support their teams on the road."
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