All airlines have ceased operations at Denver International Airport for the rest of Sunday due to blizzard conditions at the airport, DIA announced Sunday afternoon.

As of 12:30 p.m., there was 19.1 inches of snow at the airport — the official recording station for the city. The National Weather Service predicts up to 27 inches of snow will accumulate at the airport before the storm ends.

DIA said airlines were ceasing operations at 4:45 p.m., five hours after the airport closed all six of its runways due to blowing snow and poor visibility.

In addition, officials are urging travelers not to drive to the airport as Peña Boulevard is currently impassable with multiple disabled vehicles along the roadway.

If it is absolutely necessary to go to DIA, travelers must take the RTD A-Line, which is currently operating with delays.

While no flights are traveling in or out of the airport, DIA will remain open to serve passengers and employees who are already there, officials said.

According to flightaware.com, 1,436 flights were canceled and 45 were delayed Sunday at DIA. The airport has already canceled or delayed 770 flights for Monday and 112 flights for Tuesday as of 5 p.m. Sunday.

Airlines at DIA were operating a limited number of flights Sunday. On Saturday, 1,981 flights were canceled and 4,315 were delayed at DIA.

DIA closes all runways, cancels more than 1,000 flights as area receives nearly 2 feet of snow

Airlines have not yet decided on flight schedules for Monday; however, extensive delays and cancellations are expected. Passengers are strongly encouraged to check their flight status before coming to the airport.

“A good way to avoid being stuck overnight is to confirm your flight status before you head out to the airport and take advantage of any option to reschedule your flight if possible,” said Emily Williams, a spokeswoman for DIA.

DIA said snow removal crews will work to clean and treat the runaways, Peña Boulevard and airport parking lots once conditions improve, with the goal of reopening everything by Monday.

The airport has prepared supplies for the event that travelers get stranded at DIA because of the storm.