For travel over Labor Day Weekend, fly nonstop from Los Angeles to Phoenix for $128 roundtrip on Southwest.
I found tickets for this price departing Los Angeles LAX on Friday evening, August 30, returning from Phoenix PHX on Tuesday morning, September 3.
You'll find similar fares from all LA Area airports and slightly lower fares are available for non-holiday travel.
This fare includes a carry-on bag, a personal item, and 2 free checked bags.
Southwest has an open seating policy, which means there are no assigned seats and you'll get to choose your seat during boarding. The order of boarding is determined by the time of check-in so check-in exactly 24 hours before departure or pay for priority boarding for a better choice of seat.
American and United are selling Basic Economy fares for the same price on these same dates, but departure times for the lowest fares may be less desirable. However, if you need to return on Monday, September 2, fares on American or United are quite a bit less than Southwest.
American's Basic Economy includes a carry-on bag plus a personal item. United's Basic Economy only includes a small personal item. Checked bag fees are $30 each way on either airline and seats will be assigned at random for Basic Economy. Main Cabin or standard Economy fares are $70 more roundtrip.
And don't forget to check out our Weekender Search Tool for more weekend travel deals.
Looking for a place to stay in the Bay Area? Here's what's available for these Labor Day Weekend dates on Hotelwatchdog.