If you're traveling today or later this week, you may want to check that your flight is on time.
The Idaho Falls Regional Airport is reporting delays as great as two hours for many flights to and from Denver.
Marilyn Montgomery and her husband spent two hours at the airport this morning after her daughter's flight from Denver was delayed an hour.
"It's frustrating. I mean, you expect a little bit of delays like 15, 20 minutes, but not an hour,” said Montgomery.
Denver International Airport officials tell Local News 8 they had to delay flights this morning so they could de-ice the runways.
The Idaho Falls Regional Airport has a full listing of flight delays on its website.