Last update 6:45 ET.  

Another day, another nor’easter. That’s how it must feel for air travelers this week as a potent coastal storm snarled flights for the third time in less than two weeks.

Nationwide, airlines have canceled more than 1,625 flights on Tuesday and another 214 on Wednesday, flight-tracking service FlightAware counted as of 6:45 p.m. ET. Another 369 were canceled across the nation on Monday, with at least a third of those related to the then-developing storm. 

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Nearly all of those cancellations were tied to airports in the Northeast and New England, where more than a foot of snow is forecast across parts of the region.

American and Southwest had grounded their entire Tuesday schedules at Boston and at several other airports in the region. JetBlue, which operates its second-busiest airport at Boston, said it planned to operate only a few late-day arrivals there so that it could have planes in place to try to restart operations on Wednesday morning. 

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Those decisions were made a day earlier as airlines preemptively grounded more than 1,000 flights even before the storm’s first snowflakes.

“Proactive cancellations position airlines to quickly reset their schedules and operations once the storm passes,” FlightAwre spokeswoman Sara Orsi said in a Tuesday morning e-mail. “In addition to minimizing impact on travelers, they also allow airlines to strategically reposition aircraft and crews away from the impacted areas.”

For Tuesday, travelers should expect few flights to operate in Boston.

“Most impacted is Boston Logan Intl (BOS) with 840 flights cancelled (75% of flights),” said Orsi.

She added that – so far – the three big delay-prone airports serving New York City were mostly on schedule, except for cancellations on flights to Boston and other airports hampered by the storm. Wind had begun to create delays at the airports by early afternoon, leading to some delays at Newark, LaGuardia and JFK. 

But, in New England, problems were widespread. At least two-thirds of Tuesday's flights were canceled in Providence. The count was close to 60% at Portland, Maine, and a half or more at Hartford, Conn., and Manchester, N.H.

Underscoring the strength of the storm in New England, Amtrak said it was canceling all Tuesday service between New York City and Boston.

"We'll restore service when improved weather conditions allow us to do so safely," the rail carrier said via Twitter

Unrelated to the problems in the Northeast, fliers could face problems at San Francisco's airport on Tuesday. Flights arriving to the airport were being delayed because of wind, according to the Federal Aviation Administration's flight-delay map. On-an-off problems were possible there throughout the day as rainy, blustery weather moved across the area. Several dozen flights had been canceled and a few dozen more delayed as of 10 a.m. ET, though some of those likely came on flights that had been scheduled to fly to or from the Northeast.

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