ATLANTA, Georgia (CNN) -- Bad weather and an airport technical problem stalled Thanksgiving holiday travel on Monday -- and conditions are likely to worsen as Turkey Day nears.
At Dallas-Fort Worth International Airport, incoming and outgoing flights were halted when two control towers lost radio communications. The delays at the Texas airport consequently delayed flights in other cities across the country.
Weather was the culprit at other major airports, the Federal Aviation Administration said.
In Georgia, Atlanta's Hartsfield-Jackson International Airport saw flights delayed up to an hour due to heavy fog. In the Northeast, high winds caused delays at Newark International Airport in New Jersey and LaGuardia Airport in New York.
Heavy cloud cover was blamed for delays at O'Hare International Airport in Chicago, Illinois, and at Philadelphia International Airport in Pennsylvania.
In Colorado, heavy snow was expected Tuesday and Wednesday. Forecasters said the snow could bring traffic and travel problems.
The same weather system could worsen travel conditions in Oklahoma, Kansas, Nebraska, Iowa, Missouri and the Texas panhandle.
Farther out West, Oregon and Washington state also were bracing for heavy snowfall.
The Transportation Security Administration on Monday launched a holiday travel public awareness effort. Called SimpliFLY, the program includes a one-minute video that shows travelers how to "pack smart to get through security faster," the TSA said.
"Our goal is to get passengers through the checkpoint as quickly as possible while maintaining aviation security. The public can partner with us to accomplish this by coming prepared," said TSA Administrator Kip Hawley.
Meanwhile, Americans hitting the road also will be forking over more money to fill their vehicles' gas tanks.
The price of gasoline jumped another 13 cents in the last two weeks, close to the all-time high set earlier this year, according to a survey published Sunday.
The average price of a gallon of self-serve regular is $3.09, the Lundberg Survey found. That's 9 cents below the record set in May.
The latest price is also 9 cents below the inflation-adjusted, all-time high, said survey publisher Trilby Lundberg. In 1981, the price peaked at $1.35 -- which comes out to $3.10 in today's dollars using the latest Consumer Price Index data, she said.
The travel organization AAA estimates that 38.7 million Americans nationwide will take a trip 50 miles or more from home this Thanksgiving. That represents a 1.5 percent increase over last year.