Copyright Boulder Daily Camera

By The Associated Press NEW YORK (AP) — Major U.S. airports are among those facing 10% reductions in air traffic Friday due to the government shutdown. A list distributed to airlines and obtained by The Associated Press includes airports in New York, Chicago and Los Angeles among the 40 that will see flights slashed. The Federal Aviation Administration is imposing the reductions to take pressure off air traffic controllers, who are federal employees and have gone without pay during the shutdown. In addition to reduced flight traffic, the shutdown has led to more flight delays, with experts advising travelers to check flight statuses before heading to the airport, among other tips. Here’s a closer look at what to know about the reductions. Which airports are affected? The list includes 40 airports with Atlanta, Denver, Dallas, Miami, Newark and San Francisco among them. A full list of airports facing reductions is here. Why is this necessary? Air traffic controllers have gone without paychecks during the shutdown of the federal government. That’s led to controllers calling in sick and contributed to staffing shortages that have been affecting air travel for weeks. Most controllers work mandatory overtime six days a week during the shutdown without pay, the National Air Traffic Controllers Association has said. That leaves little time for a side job unless controllers call in sick to the FAA. When will the reductions begin and end? They’re set to start Friday, with passengers expected to be notified on Thursday. Airlines have said people could see weekend travel plans disrupted with little notice. It’s unclear when the reduced flights could end. Airlines, unions and the travel industry have urged Congress to end the shutdown, which on Wednesday became the longest on record. What will the effect of the reduction be? The cuts could include up to 1,800 flights and about 268,000 seats combined, according to one estimate. United Airlines and Delta Air Lines both said they would offer refunds to travelers who opt not to fly, even if they have tickets that aren’t normally refundable. Transportation Secretary Sean Duffy warned this week there could be chaos in the skies if the shutdown drags on long enough for controllers to miss their second full paycheck next week. Has this happened before? FAA Administrator Bryan Bedford said this week that he’s never seen these kinds of measures taken before in his nearly four-decade experience in the aviation field. “We’re in new territory in terms of government shutdowns,” he said. Staffing problems led to delays throughout October, but they were mostly isolated and temporary. Last weekend, though, saw a change. From Friday to Sunday evening, at least 39 air traffic control facilities reported potential staffing limits, according to an Associated Press analysis of operations plans shared through the Air Traffic Control System Command Center system. The figure, which is likely an undercount, is well above the average for weekends before the shutdown. During weekends from Jan. 1 to Sept. 30, the average number of airport towers, regional control centers and facilities monitoring traffic at higher altitudes that announced potential staffing issues was 8.3, according to the AP analysis. List of airports impacted by government shutdown 1. Anchorage International in Alaska 2. Hartsfield-Jackson Atlanta International in Georgia 3. Boston Logan International in Massachusetts 4. Baltimore/Washington International in Maryland 5. Charlotte Douglas International in North Carolina 6. Cincinnati/Northern Kentucky International in Ohio 7. Dallas Love Field in Texas 8. Ronald Reagan Washington National in Virginia 9. Denver International in Colorado 10. Dallas/Fort Worth International in Texas 11. Detroit Metropolitan Wayne County in Michigan 12. Newark Liberty International in New Jersey 13. Fort Lauderdale/Hollywood International in Florida 14. Honolulu International in Hawaii 15. Houston Hobby in Texas 16. Washington Dulles International in Virginia 17. George Bush Houston Intercontinental in Texas 18. Indianapolis International in Indiana 19. John F. Kennedy International in New York 20. Harry Reid International Airport in Las Vegas 21. Los Angeles International in California 22. LaGuardia Airport in New York 23. Orlando International in Florida 24. Chicago Midway International in Illinois 25. Memphis International in Tennessee 26. Miami International in Florida 27. Minneapolis/St Paul International in Minnesota 28. Oakland International in California 29. Ontario International in California 30. Chicago O`Hare International in Illinois 31. Portland International in Oregon 32. Philadelphia International in Pennsylvania 33. Phoenix Sky Harbor International in Arizona 34. San Diego International in California 35. Louisville International in Kentucky 36. Seattle/Tacoma International in Washington 37. San Francisco International in California 38. Salt Lake City International in Utah 39. Teterboro in New Jersey 40. Tampa International in Florida