Southwest charges are least expensive when bought three months to 30 days ahead of time are the best opportunity to purchase Southwest Carriers Tickets for sure is the least expensive day to fly on Southwest Aircrafts. Practically every one of the low tolls evaporate after the 30-day time frame has elapsed. Notwithstanding, perusers have seen that they have looked through the day preceding their flight and tracked down a superior charge and rebooked, so no one can say with any certainty. Assuming you stand by too lengthy after the three-month point, the offers are by and large gone, except if they're important for a Cheapest days to FLY Southwest. Cheapest days to FLY Southwest does things somewhat better, in any event, with regards to flight plans. Most of aircrafts sell tickets 11 months ahead of time, plus or minus a couple of days. Southwest, then again, distributes its flight plan for wide clusters at various times during the year.