United has matched last week's Southwest sale with a nearly identical sale of their own. If you prefer to fly out of major airports like Chicago-O'hare, Houston-Intercontinental, or Washington-Dulles, this sale may be what you're looking for. You may find that American and/or Delta will be matching along some routes as well.

Travel is valid on Tuesdays, Wednesdays, and Saturdays through June 13, 2018, with a 21-day advance purchase required. Avoid blackout dates on May 24, 25, & 28. A Saturday night stay may be required depending on the route. There also may be a 30-day max stay.

Tickets must be booked by March 29, 2018.

A sample of nonstop fares include:

Cleveland to Milwaukee $97 round-trip

San Francisco to Burbank $117 round-trip

Chicago to Detroit $139 round-trip

Chicago to Norfolk $191 round-trip

Chicago to Charleston $193 round-trip

Charlotte to Houston $213 round-trip

Washington D.C. to Columbia $215 round-trip

Houston to Tulsa $219 round-trip

Spokane to San Francisco $223 round-trip

Charlotte to Chicago $263 round-trip

St. Louis to Houston $263 round-trip

Houston to Nashville $265 round-trip

Denver to Tucson $269 round-trip

Newark to St. Louis $271 round-trip

There are many more routes and these fares all work in reverse as well. Prices are for basic economy and only include one small personal item (small backpack, purse, etc.). Larger carry-on bags are not allowed. Checked bag fees start at $25 each way. If you would like to bring a larger carry-on bag, consider the higher regular economy price. 

Above image by Sorbis via Shutterstock.