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Southwest Airlines’ Big Sale Is Back, With a Catch

Southwest Airlines Takes Off From PhiladelphiaSouthwest Airlines Takes Off From Philadelphia
Southwest Airlines employee assists a passenger.Photo by William Thomas Cain—Getty Images

Southwest Airlines’ (LUV) biannual sale is back, but with more limitations than ever.

The three day sale began on Tuesday, June 7, and will last for a total 72 hours, going through June 9. This is something that the airline has done every June and October in recent years. According to USA Today, it was such a hit last summer that it crashed the company’s website and drove Southwest to prolong the deal by an extra day.

The Fortune 500 company is offering tickets for as low as $44. Dozens of roundtrip tickets can be booked for under $100, though those are generally the airline’s shortest flights. Prices appear to vary based on the region you’re traveling to or from, and the distance being traveled.

According to Southwest’s website, domestic flights can only be booked from August 23 to December 14. That range is just one day shorter for international flights, and is cut down even more if you’re traveling to or from San Juan, Puerto Rico. Those flights are only valid from September 7 to December 8.

Departure dates are also only available on certain days of the week. Before now, Southwest allowed people taking advantage of the sale to fly five days a week, omitting Fridays and Sundays. That has now been reduced to just three days a week, or four if you’re traveling to or from Puerto Rico. Departure dates for international travel are only available two days a week, on Tuesdays and Wednesdays.