Planning for an early winter adventure? Travelers are definitely fortunate for Southwest Airlines is offering one-way flights as low as $49 in a flash sale for both domestic and international destinations.

Not like other flash sales that heavily restrict days of travel, Huffington Post says that these domestic flight deal are available for everyday of the week except Friday and Sunday. Also, sales like these can prompt other airlines to have their fares cheaper as well to attract customers as a means of competition. That's why, it's important to be on the lookout for hot deals from carriers who also fly the same route as Southwest.

Furthermore, the sale started Tuesday morning and lasts for only 72-hours.

For the prices, Oklahoma City, OK, Omaha, NE, Salt Lake City, UT only cost cost $49.

There are also places which you can go to that has a rate of just $79 - Albuquerque, Dallas, Houston, Las Vegas, Ontario, Seattle, and St. Louis among others.

Also, for $99 a traveler can visit places like Cleveland, Detroit, Nashville, Sacramento, San Francisco, San Diego, and Washington.

Boston Logan, Grand Rapids, Louisville, New York, Philadelphia will only cost you $129.

There are restrictions for the  three day sale, one must book tickets by October 6th for trips between the dates below. According to KDVR:

Travel in the U.S. valid November 30, 2016 through December 20, 2016 and January 4, 2017 through February 15, 2017.

Travel to/from San Juan, Puerto Rico valid November 30, 2016 through December 8, 2016 and January 17, 2017 through March 2, 2017.

International travel valid November 30, 2016 through December 13, 2016 and January 10, 2017 through March 2, 2017.

As for an advice to interested customers, Dawn Gilbertson said, "Travelers can combine sale fares and other fares for a round-trip ticket. You might even find cheaper fares than the sale fares by using the calendar. I found one-way fares as low as $54 to Chicago in December, for example,"

He also recommended checking fares on other airlines "as they tend to match Southwest's sale fares on competing routes." It's important to keep in mind the baggage fees as well. Southwest reportedly accepts the first two checked bags for free, as long as it's not oversized.