Amazon is not the only company having a prime day for sales. Frontier Airlines just posted one of its biggest sales ever. It claims to have 3 million seats on sale with fares as low as $20 one-way or $39 roundtrip.
While Frontier is an ultra-low-cost carrier with extra fees for everything from snacks to a carry-on bag, these ultra-low fares can still save a lot of money as long as you know what you are getting and purchase any necessary extras in advance.
Travel on Tuesdays and Wednesdays from August through early March. Mondays, Thursdays, and Saturdays are also available for travel in August and September.
Blackout dates apply on September 3, November 22 - December 2, December 29, 2019 - January 6, 2020, and January 21, 2020.
Most routes are only flown on specific days of the week so you'll have to click around to find available flights. Many routes are also seasonal and may either begin or end in mid-November.
Tickets must be booked by 11:59 pm ET, July 17, 2019.
All fares are nonstop and work in the reverse direction as well.
There are many more routes on sale as well. The lowest fares may not be available throughout the entire travel period and you'll have to decline all extras to get the lowest price.
These fares only include one small personal item. Checked bag fees start at $30 each way when purchased during the initial booking. Larger carry-on bag fees start at $35 each way.
Seats will be assigned at random upon check-in for these prices. You may pay a fee to choose a specific seat.
Frontier offers the Works bundle, which can be added to any flight during the initial booking. It includes a standard carry-on bag plus a personal item, one free checked bag, seat selection (including stretch seating), priority boarding, flight flexibility, and refundability. This is a value if you want all of these amenities, but chances are you can get away with just adding what you need a la carte for cheaper.
Searching Frontier's site, I found flights departing Cincinnati CVG on Wednesday, October 16, returning from Ft. Lauderdale FLL on Wednesday, October 23, for $39 roundtrip.