Frontier is having a good sale on most of its international flights to Mexico and the Caribbean. Fares start at just $159 roundtrip.
If you are unfamiliar with Frontier Airlines, please read our guide on Everything You Need to Know Before You Fly Frontier.
Travel is valid through March 6, 2019, with a 7-day advanced purchase required. There are no advertised blackout dates, but peak travel around the holidays will be more expensive. Most routes are only flown on a few days each week so be sure to click on the fare details for more booking info.
Tickets must be booked by 11:59 pm ET, on November 2, 2018.
Nonstop fares include:
Keep in mind that Frontier charges extra for any bags larger than a small personal item (small backpack, large purse, etc.). Pack super light to get the lowest price. Checked bag fees start at $30 each way. Larger carry-on bag fees start at $35 each way.
If you want to avoid all extra fees, read How to Pack in Just a Personal Item Sized Bag.
As an example booking, I found seats departing Raleigh RDU on Sunday, December 30, returning from Cancun CUN on Tuesday, January 8, for $159 roundtrip.