United Airlines is having a flash sale with one-way flights starting at $59

roman_slavik / iStock The INSIDER Summary: United Airlinesis having a flash sale endingJune 29. The sale isfordomestic travel. The sale flights depart fromsevencities, with the lowest fare coming in at $59 one-way. The cheapest faresare for United'snew fare option,Basic Economy. United Airlinesis having a flash sale with one-way flights for as little as $59. The $59 one-way fares apply to flights fromSan Franciscoto Seattle. The next-cheapest flights are$63, from Chicago to Detroit, then $71 fro...