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In honor of today’s Pluto fly-by, Frontier Airlines has released a 14% off coupon code (PLUTO) that is valid until 7/15 for flights from 8/17/15 – 12/16/15. This stacks with the cheap $49ish fares that Frontier offers, so could be a way to score a pretty cheap flight if the timing works out for you!
Also in honor of the planet-formerly-known-as-Pluto, Frontier is also offering 500 free miles to those who sign-up for their Early Returns program, so if you haven’t done that in the past it could be a good time to go ahead and join.