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Frontier Airlines is offering $20 off a flight if booked by tomorrow, May 21, 2015. This promotional code SAVE20 can be used in addition to their already existing $39 fare sale, allowing you to double dip on saving money!
This is for flights for travel between May 27 and August 15, 2015, but only flights on a Tuesday, Wednesday, or Saturday are eligible. If you are able to get a roundtrip flight on one of these three days, you’ll get $20 off your total flight purchase, but if only one of the flights is on the discounted days or you are booking a one-way flight, you’ll only receive $10 off the flight.
Frontier fares are typically pretty low, so this could help you get a nice deal for summer travel!