At Midway Airport, average flight delays of more than 15 minutes were reported on Sunday afternoon and a total of 264 flights on all airlines were canceled.
Passengers were evacuated from the plane using emergency slides, she said. The incident was first reported around 7:30 p.m.
Southwest Airlines on Sunday canceled more than 200 flights due to shortage of airplane de-icing fluid as the Midway Airport in Chicago, Illnois was hit by winter storm.
The carrier had cancelled six Midway departures as of mid-morning on Monday, according to FlightAware.
The flight was carrying 139 passengers and 5 crew members, airport officials tweeted.
Southwest was forced to cancel almost all of its Sunday flights as it waited for the pump to be repaired.
In a statement, the airline said its employees in Orange County were "working diligently" to make accommodations for passengers.
The airport initially said the plane had landed prior to the fire, but later corrected their tweet.
At the time the fire broke out, the plane was pushing back from the gate, Thompson said.
In a statement, Alyssa Eliasen, a spokesperson for the airline, said Southwest had "actively worked to manage our glycol levels (used to deice aircraft)", but that due to the severity of the winter weather it was forced to cancel the flights.