Travel is valid Sept. 17 - Nov. 18. Flights on Fridays and Sundays will be slightly higher. This sale expires on Monday, Sept. 21.

Here are just a few of the best each-way fares (valid in either direction):

San Francisco-San Diego ... $39
Los Angeles-San Francisco ... $39
San Francisco-Seattle ... $39
Seattle-Las Vegas ... $69
San Diego-Seattle ... $69
Los Angeles-New York ... $99
Boston-Seattle ... $99
San Diego-Washington, D.C. ... $99
New York-Las Vegas ... $99
Washington, D.C.-Orange County ... $99