To celebrate its fourth birthday, which is next week, Virgin America is offering flights for the rest of the day from O’Hare International Aiport to San Francisco for $99 each way. With taxes and fees, the round-trip total is a quite respectable $212.

Booking must be completed by 11:59 p.m. Pacific time 1:59 a.m. Friday in the great Midwest, and travel needs to happen between Aug. 11 and Nov. 16. Details can be found here. If you’re based elsewhere and looking for deals to San Francisco, other Virgin birthday discounts can be found here.A word of warning: all seats on all flights are not discounted, so you might need to hunt a bit to make it work. Regardless, happy birthday, Virgin.