Some customers of Delta.com and other online travel sites got a day-after-Christmas gift thanks to a computer glitch that enabled some travelers to book tickets for as low as $20 or $25.

Delta Air Lines said that it had corrected the error and would honor the fares that it sold at the low price.

A spokesman for Delta said that for a portion of the morning of Dec. 26 some prices were incorrectly displayed on Delta.com and other booking channels, resulting in lower than usual fares for customers.

"The situation has been resolved, and the correct prices are being displayed," a Delta spokesperson said. "Delta will honor any fares purchased at the incorrect price."

The low fares, called "mistake fares," appeared around 9 a.m., according to posts on FlyerTalk.com. Members of the forum reported seeing fares for as low as $13 on Expedia.ca, Delta.com and elsewhere. One user saw a business-class fare of $36.85 for Los Angeles to Miami.

The Delta site appeared to be experiencing some problems on the afternoon of Dec. 26, displaying the term "internal server error" or "unexpected error" when users clicked through on flight queries.

Follow Kate Rice on Twitter @krtravelweekly.