JetBlue is having another two-day sale, with one-way fares starting at $49. It's a good opportunity to plan a fall getaway.
The cheapest flights are between Long Beach and San Jose, Chicago and Fort Lauderdale, and Puerto Rico and St. Croix. (Caribbean island hopping, anyone?)
Other example fares include $89 between Atlanta and Boston, and between Austin and Fort Lauderdale.
Fly to Havana, Cuba, from Fort Lauderdale for only $89, or from New York City for $159. Additional Caribbean destinations with cheap fares include Barbados, the Dominican Republic, Curacao, St. Lucia, Aruba, Jamaica, the Bahamas ... you get the idea.
Travel dates are from September 6 to November 7, with blackout dates from September 20-25 and October 5-9. To take advantage of the sale, book by August 16.
Check fares from your home airport on JetBlue.
If none of those options strike your fancy, you can also find cheap flights to Hawaii right now on Hawaiian and United.