United Airlines offers select nationwide roundtrip fares with prices starting at $138, as provided by ShermansTravel. (Click on "" in the main paragraph to see this sale; all taxes are included.) That's the second-best rate we've seen for nationwide roundtrip fares on United. It's also a current low for select routes by $20. This price is valid on flights departing from San Francisco, CA, (SFO) to Los Angeles, CA, (LAX) on April 9; prices vary depending on the departure cities and dates chosen. A roundtrip purchase is required. Blackout dates may apply. Book this travel deal by April 7 for travel April 1 through June 7. Other notable deals:

San Francisco (SFO) to Orange County (SNA) from $138

Houston (IAH) to New Orleans (MSY) from $182.50

Chicago (ORD) to Washington, D.C. (IAD) from $218

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