United Airlines via ShermansTravel offers select United Airlines 1-Way Fares Nationwide with prices starting from $44.30. (On the ShermansTravel landing page, click on "United.com" in the top paragraph to book.) This price is valid on flights from Denver, CO, (DEN) with arrival in Chicago, IL, (ORD) on February 14. That's the lowest price we could find for select routes by $11, although we saw such fares for $5 less two weeks ago. Book this travel deal by February 28.

Prices, dates, and booking details were valid at the time of publication.