Residents and visitors are still watching closely for what Hurricane Dorian could bring over the next few days. (September 3)

Travelers should support a new round of heavy flight cancellations Wednesday and potentially the rest of the week as Hurricane Dorian crashes up the east coast.

Airlines have already canceled nearly 700 Wednesday flights to, out of and in the United States, according to flight tracker FlightAware, and the total is likely to grow. It is on top of more than 1800 cancellations on Tuesday and 1500 on Monday.

Most of the canceled flights are to and from Florida, where several airports, including the giant Orlando International Airport in Florida, are still closed. Nearly 330 Orlando flights have already been canceled, according to FlightAware. The airport has not said when it plans to reopen, but the Federal Aviation Administration's website shows that it will reopen at 5 p.m. EDT on Wednesday.

At smaller Jacksonville International airports, flight cancellations are approaching on Wednesday already 120 flights.

Fort Lauderdale International Airport, which reopened Tuesday afternoon, shows only 34 inbound and outbound cancellations, a fraction of the cancellations it had Monday and Tuesday.

In Charleston, SC, a city worker secures plywood panels over the windows of the Old Exchange and the Provost Dungeon building on September 3 in preparation for Hurricane Dorian. (Photo: MATT BURKHARTT / Staff)

However, the travel problem is spreading to nearby states. In Charleston, South Carolina, Charleston International Airport plans to close at 3 p.m. EDT on Wednesday and do not expect to open again until Friday morning.

Airlines have had travel anomalies in place since the storm began to develop last week and have expanded the number of cities and travel dates. In general, the exemptions allow travelers to make a one-time flight change to get out of the storm without paying the usual penalties, which include large ticket exchange fees. Policies vary by carrier, but travelers who are concerned about upcoming flights should make changes as early as possible for best availability.

Travelers whose flights are canceled may request a refund or rebook when flights are available.

Hurricane Dorian Airline Travel Advisors

Allegiant Air

American Airlines

Delta Air Lines

Frontier Airlines

JetBlue Airways

Southwest Airlines

Spirit Airlines

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