Petroleum pump jacks are pictured in the Kern River oil field in Bakersfield, California
Oil prices rose around 3% on Monday due to hopes that the Omicron COVID-19 variant will have a limited impact on global demand in 2022, even as surging cases caused flight cancellations.
Global benchmark Brent crude rose $2.53, or 3.3%, to $78.67 a barrel by 11:01 a.m. EST (1601 GMT). U.S. West Texas Intermediate (WTI) crude rose $2.01, or 2.7%, to $75.80 a barrel. The U.S. market was closed on Friday for a holiday.
Oil, which plunged by more than 10% on Nov. 26 when reports of a new variant first appeared, gained last week after early data suggested that Omicron could cause a milder level of illness.
"Though Omicron is spreading faster than any COVID-19 variant yet, a relatively relieving news is that most people infected with Omicron are showing mild symptoms, at least so far," said Leona Liu, analyst at Singapore-based DailyFX.
More than 1,300 flights were cancelled by U.S. airlines on Sunday as COVID-19 reduced the number of available crews while several cruise ships had to cancel stops.
"The disruption to goods and services from isolating workers, notably air travel, seems to be the main fallout so far," Jeffrey Halley, analyst at brokerage OANDA, said of rising Omicron cases. "That is only likely to cause short-term nerves, with the global recovery story for 2022 still on track."
Brent has risen by more than 45% this year, supported by recovering demand and supply cuts by the Organization of the Petroleum Exporting Countries and its allies, collectively known as OPEC+.
Talks resume on Monday between world powers and Iran on reviving Tehran's 2015 nuclear deal. Iran said oil exports were the focus of the talks, which so far appear to have made little progress on boosting Iran's shipments.
Also on investors' radar is the next OPEC+ meeting on Jan. 4, at which the producer alliance will decide whether to go ahead with a planned 400,000 barrels-per-day (bpd) production increase in February.
OPEC+ stuck to its plans at its last meeting to boost output for January despite Omicron.
Reporting by Stephanie Kelly in New York Additional reporting by Alex Lawler in London and Florence Tan and Koustav Samanta in Singapore. Editing by Louise Heavens and Matthew Lewis