Credit: Courtesy of United

If you're traveling to Dallas from Denver or Los Angeles from Las Vegas this spring, you're going to want to listen up. United Airlines is offering $35 one-way flights for the aforementioned routes on select travel dates. If this works in your favor, make sure to book before April 30th to take advantage of this deal.

There's no banner calling out the sale on United's website, but Time did a little digging and found that flyers flying either of these routes on May 10th or 11th can still currently book a flight for $36. Act fast: like any other flight deal, these fares won't last long.

Erika Owen is the Audience Engagement Editor at Travel + Leisure. Follow her on Twitter and Instagram at @erikaraeowen.