After the closure of American airspace and amid fears of further terrorist attacks, Aeroflot Russian International Airlines indefinitely canceled its flights to the United States, Canada and Israel, while Delta Airlines halted its Russian-American routes.

Aeroflot runs 19 round trips a week to the United States and six to Canada. Delta, meanwhile, flies daily between Moscow and New York.

Flights already in the air at the time of the attacks were immediately rerouted. One Airbus 310 headed for New York landed at Canada's Goose Bay air base, while a Chicago-bound Boeing 767 landed in Montreal. And a Delta Boeing 767 en route to New York stopped in Dublin, Ireland. All three planes, along with their passengers and crew – possibly as many as 380, according to airline officials – are still stranded in those locations, awaiting permission from the U.S. Federal Aviation Administration to continue on.

"No one has yet applied for medical aid and all the passengers and crew members regularly receive warm meals and have access to a long-distance phone line," said Andrei Turovtsev, Aeroflot's representative in Canada. He did not know when the travelers would be able to resume their journeys.

Including those stranded in Canada, Aeroflot has 735 would-be passengers affected by the route closures. All of them have been offered the opportunity to refund their tickets or reschedule on flights after regular service resumes, likely after Monday, Sept. 17.

At least one of the stranded Aeroflot travelers, though, is planning to return as soon as possible to Russia, while many Canadian travelers have called Aeroflot to cancel their Russian travel plans, Turovtsev said.

"I think it has to do with an overall fear toward airplanes, generated by these unparalleled terrorist attacks," he said.