Speaking of those fares Q-L... From the UA website:

Here are examples of United's off-peak sale fares (roundtrips):

San Francisco-Seattle: $98
Denver-Seattle: $228
Chicago-Seattle: $248
Washington, D.C.-Seattle: $448
New York City-Seattle: $448

The fares must be purchased at least 14 days in advance of travel and within 24 hours of making reservations but no later than July 23, 1999. They require a Saturday night stay and are non-refundable. These fares are available for travel between July 27 and September 30. All fares are subject to availability; seats are limited and may not be available on certain high-demand
flights. At these prices, customers should book early for best availability.