SAN FRANCISCO (CBS SF) — Inclement weather on the East Coast is causing flight delays as travelers head home for the Thanksgiving holiday, a San Francisco International Airport spokesman said.

Travelers flying to Newark, Boston, New York and Philadelphia can expect delays ranging from 73 minutes in Boston to more than 3 hours in Newark, according to the Federal Aviation Administration’s website.

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SFO spokesman Doug Yakel said the FAA will often impose a delay program when bad weather reduces an airport’s capacity to receive aircrafts.

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“It’s just like metering lights on the freeway,” Yakel said.

Yakel recommended travelers check in with their airline before heading to the airport.

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The FAA also logs the delays expected for each airport at http://www.fly.faa.gov/ois/.