The Federal Aviation Administration will significantly reduce flight capacity at airports across the country beginning Friday amid the ongoing government shutdown.

The agency instructed every airline to reduce flights by 10% across 40 high-traffic airports in the country.

Transportation Secretary Sean Duffy said this week that the decision was made out of concern for safety due to staffing shortages as air traffic controllers go unpaid while the government remains closed.

Several airlines confirmed the news and informed customers of the disruptions to regularly scheduled flights, with United Airlines and American Airlines among those offering refunds.

The reductions and cuts will affect most of the country’s largest and busiest airports, in red and blue states, including those in the New York, Los Angeles and Chicago areas; Hartsfield-Jackson Atlanta International Airport; Dallas/Fort Worth International; and Miami International.

Here’s a list distributed to airlines of all airports expected to experience flight reductions, as reported by multiple outlets:

1. Anchorage International (ANC)
2. Hartsfield-Jackson Atlanta International (ATL)
3. Boston Logan International (BOS)
4. Baltimore/Washington International (BWI)
5. Charlotte Douglas International (CLT)
6. Cincinnati/Northern Kentucky International (CVG)
7. Dallas Love (DAL)
8. Reagan Washington National (DCA)
9. Denver International (DEN)
10. Dallas/Fort Worth International (DFW)
11. Detroit Metropolitan Wayne County (DTW)
12. Newark Liberty International (EWR)
13. Fort Lauderdale/Hollywood International (FLL)
14. Honolulu International (HNL)
15. Houston Hobby (HOU)
16. Washington Dulles International (IAD)
17. George Bush Houston Intercontinental (IAH)
18. Indianapolis International (IND)
19. New York John F. Kennedy International (JFK)
20. Las Vegas Harry Reid International (LAS)
21. Los Angeles International (LAX)
22. New York LaGuardia (LGA)
23. Orlando International (MCO)
24. Chicago Midway (MDW)
25. Memphis International (MEM)
26. Miami International (MIA)
27. Minneapolis/St. Paul International (MSP)
28. Oakland International (OAK)
29. Ontario International (ONT)
30. Chicago O’Hare International (ORD)
31. Portland International (PDX)
32. Philadelphia International (PHL)
33. Phoenix Sky Harbor International (PHX)
34. San Diego International (SAN)
35. Louisville International (SDF)
36. Seattle/Tacoma International (SEA)
37. San Francisco International (SFO)
38. Salt Lake City International (SLC)
39. Teterboro (TEB)
40. Tampa International (TPA)