Air travelers have had a rough past couple of weeks  -- with about 3,200 flights cancelled since Sunday as a result of the second winter storm in five days. Flights across the country were affected, from the Rockies to the Great Lakes and the Northeast.

Last week's storm, according to USA Today, snarled flights into the weekend, prompting airlines to cancel more than 2,000 flights.  A total of 5,200 flights were cancelled over the past seven days.

FlightStats indicated that airlines had cancelled 354 flights nationwide as of 10:45 a.m. ET. Not all of these are a direct result of the storm, but most of them are from airports in the storm's path. Chicago O'Hare cancelled 160 flights, New York LaGuardia cancelled 50 and Newark cancelled about two dozen as of 10:45 a.m.

Even for those fliers who do not have to cope with the headache of cancelled flights, they'll still have to put up with delays. Chicago O'Hare will probably see off-and-on delays as the storm winds down in that area, USA Today reported.

The Federal Aviation Administration's flight-delay map indicates that as of 10:50 a.m., New York JFK, New York LaGuardia, Newark Liberty, Philadelphia, Baltimore/Washington International and Chicago O'Hare all have significant flight back-ups.

To help passengers coping with the messy weather, airlines are also waiving fees for passengers flying through the most-affected airports, USA Today reported.

Tuesday was the worst day for fliers so far, with 1,574 flights cancelled nationwide, FlightStats indicated.

As of 10:45 a.m. 354 flights were cancelled on Wednesday, on top of totals from Sunday (775), Monday (607) and Tuesday. This brings storm-related cancellations to 3,310 since Sunday, according to FlightStats.

Some large airlines are using flexible rebooking policies for fliers with flights to, from or through affected airports.

Although the exact policy varies by airline, USA Today reported, most allow customers to make one change without an additional fare or change fees with a certain rebooking window.