(The Hill/WFXR) — More than 1,800 flights within, into, or out of the U.S. have been canceled on Monday as airlines grapple with inclement weather and staff shortages due to COVID-19.

A total of 1,867 flights were canceled as of 8:20 a.m. on Monday, Jan. 3 according to FlightAware. As of Monday morning, airlines have already issued 861 delays for flights within, into, or out of the U.S.

Southwest canceled 437 flights, JetBlue reported 136 cancellations, United recorded 103 cancellations, Delta called off 78 flights and American Airlines canceled 36 trips, according to FlightAware.

On a local level, the Roanoke-Blacksburg Regional Airport says the following flights have been canceled or delayed as of 10:35 a.m. on Monday:

  • Arrivals:
    • Canceled — American flight 6037 from Charlotte at 10:27 a.m.
    • Canceled — Delta flight 5530 from Atlanta at 10:37 a.m.
    • Canceled — American flight 6124 from Charlotte at 12:12 p.m.
    • Canceled — United flight 3956 from Washington-IAD at 12:13 p.m.
    • Delayed from 8:53 p.m. to 9:56 p.m. — Allegiant flight 2291 from Sanford Orlando
  • Departures:
    • Delayed from 8:10 a.m. to 8:50 a.m. — American flight 6159 to Philadelphia
    • Delayed from 9 a.m. to 10:40 a.m. — American flight 6070 to Charlotte
    • Canceled — American flight 6037 to Charlotte at 10:57 a.m.
    • Canceled — Delta flight 5530 to Atlanta at 11:20 a.m.
    • Canceled — American flight 6124 to Charlotte at 12:37 p.m.
    • Delayed from 9:38 p.m. to 10:36 p.m. — Allegiant flight 2405 to Sanford Orlando

The Lynchburg Regional Airport has also canceled American Airlines flight 6031, which was supposed to arrive from Charlotte at 10:17 a.m. and then leave for Charlotte at 10:42 a.m.

Monday’s cancellations were the latest in a weeks-long saga of airlines being forced to cancel trips because of a nationwide surge in COVID-19 cases. Some airlines reported staff shortages because of the virus, forcing them to pare down the number of flights per day.

The U.S. is seeing a spike in COVID-19 infections driven in part by the omicron variant, which is more transmissible than previous strains of the virus.

More than 2,700 flights within, into or out of the U.S. were canceled on Sunday, Jan. 2. More than 15,000 U.S.-flights have been canceled since Christmas Eve, according to USA Today.

Inclement weather conditions are also driving Monday’s flight cancellations. A winter storm slammed a part of the Midwest on Sunday and is now headed for sections of the East, according to USA Today.

Federal offices in Washington, D.C. are closed on Monday because of the wintry weather.

Undeterred by the cancellations and delays, travelers still made trips this weekend. The Transportation Security Administration (TSA) says more than 1.6 million individuals passed through travel checkpoints on Saturday, Jan. 1.