( CNN ) Spirit Airlines has a new fare deal and is announcing it with sex jokes . The low-cost carrier just acquired its 69th plane and is celebrating with $ 69 round-trip fares in April and May that include taxes and fees -- although additional baggage charges may apply . Round-trip purchase is not required , so you could actually pay $ 34.50 for a one-way flight . But the airline is getting more attention for its cheeky ad copy , which obliquely references a sexual act . `` We 've been waiting to hit 69 planes for years , '' reads the offer on Spirit 's website . `` It 's our favorite number -- ever since we were twelve and found that magazine under our brother 's bed ( the one with the fantastic articles ) . Use your mouth to spread the word : Spirit is in an even better position to get you where you 're going . '' Some observers say the promotion is sophomoric and has crossed the limits of good taste . `` You ca n't object to that price point , but you certainly can object to the discount airline 's marketing strategy , which is so juvenile it led us to wonder if Spirit 's website was hacked , '' wrote Aaron Rupar of KMSP in Minneapolis . Spirit spokesman Paul Berry , in a prepared statement , said the promotion reflects the airline 's quirky culture . `` Spirit is n't your typical airline and we do n't want to be . We enjoy being different than other airlines , '' said Berry , Spirit 's director of corporate communications . `` When it comes to advertising , different means we do n't spend a lot of money on advertising -- because that just increases fares . But we 're also different because our ads are fun , provocative , sometimes silly and often irreverent . They get lots of attention , '' he added . `` The vast majority of our customers find these types of ads humorous and accept them for what they are . We understand there is a small group of people who feel differently . '' The $ 69 fares must be booked by the end of the day Tuesday . Questionable taste or not , the promotion may be working : People were complaining on Twitter that they could n't access Spirit 's website to book flights . Based in Florida , Spirit Airlines is famous for charging fees for almost everything it possibly can . The airline 's defense is simple : Pay for what you want on your flight , and do n't pay for what you do n't want . Airline plans $ 15 flights to Europe .
Spirit is offering suggestive $ 69 fares . The airline announced them with a pitch that may remind us of high school jokes . The cheeky airline is known for charging for almost all extras .