Travelers flying to or from San Diego International Airport could experience flight delays or cancellations starting Friday as the cutbacks in flight capacity began at 40 major airports nationally.

Thousands of flights have been cancelled or delayed across the United States, as the country continues to feel the pinch after the U.S Secretary of Transportation took the unprecedented steps to shave up to 10% of all scheduled flights to release the pressure put on air traffic controllers during the federal government shutdown.

Cancelations and delays are mounting at major U.S. airports Friday morning, a day after the Federal Aviation Administration ordered airlines to cut thousands of flights due to the government shutdown.

The FAA has reduced flights at major airports, blaming the federal government shutdown. What happens if airlines cancel your flight.

Travelers told News 5 this was the highest volume of traffic in the airport that they have seen since pre-pandemic.

United, American, Delta, and Southwest are among the airlines adjusting schedules and warning passengers to expect potential disruptions at SFO and across Bay Area airports.

Airlines have started to cancel hundreds of flights as they comply with the Federal Aviation Administration's (FAA) order to reduce air traffic.

More than 1,100 US flights were canceled and over 12,000 were delayed on Friday as the Trump administration ordered air traffic cuts amid the record 38-day government shutdown. The FAA’s reduction plan affects 40 major airports as staffing shortages among unpaid controllers deepen nationwide.

Hundreds of flights, a small overall percentage, were canceled on Friday following orders by the Trump administration as the government shutdown leaves air traffic controllers working without pay. Disruptions at major airports appeared limited.

Several airports that send flights to Palm Beach International Airport could see flight cancellations amid the federal government shutdown.