CHICAGO >> It looks like United Airlines fixed its computer problems just in time for busy weekday travel.

United dealt with significant delays over the weekend as it integrated its passenger records data with Continental Airlines. United and Continental merged in 2010 but the company didn’t finish merging all its operations until Saturday.

The delays were worst on Saturday. United spokeswoman Megan McCarthy said a quarter of the company’s flights on Saturday were delayed 30 minutes or more, but 99 percent of all flights were completed.

By Sunday, flight-tracking website Flightstats.com was showing 73 percent of United arrivals were on-time, although almost half its flights were late in leaving its big hub in Chicago.

On Monday, Flightstats was showing that on-time departures improved to 84 percent.

United added 600 additional reservations agents worldwide to help with calls over the weekend. Wait times were high anyway, including on Monday. The airline said it is working to reduce call volume.

United and Continental merged in 2010 but the company didn’t finish merging all its operations until Saturday. 

The company, which is based in Chicago, held four dress rehearsals to practice for the switch.