Airlines were waiving change fees Monday as fliers faced another day of weather-related headaches.

The flexible rebooking policies covered a number of major airports in the mid-Atlantic and Northeast, but travel trouble spots awaited fliers across the nation Monday. Aside from the rainy weather in the East, storms in the South and visibility concerns in the West also were affecting flights. 

Nationwide, about 430 flights had been canceled and a whopping 6,000 delayed as of 6:50 p.m. ET, according to flight-tracking service FlightAware. Many of those came in the mid-Atlantic and Northeast, where delays were growing at the airports serving New York City, Washington and Baltimore. But several airports outside the Northeast also were seeing problems, including Houston Bush Intercontinental, Los Angeles, San Francisco and Seattle.

Spawning Monday’s change-fee waivers in the Northeast was a system moving from the Ohio Valley into New England. Forecasts called for heavy rain and poor visibility, including at the delay-prone airports serving Philadelphia and the New York City area. Other parts of the region – including areas near the Washington and Baltimore metro areas – were under a flash flood watch Monday.

FLIGHT TRACKER: Is your flight on time?

IN PHOTOS: 30 cool aviation photos (story continues below)

Autoplay

Show Thumbnails

Show Captions

 

Travelers scheduled to fly through the region should keep watch on flight schedules as the day progresses.

Monday’s potential problems come after three days of unsettled weather created major disruptions last week. More than 3,600 flights were canceled in the U.S. and another 21,800 delayed from Wednesday through Friday, according to data from FlightAware. Many of those stemmed from storm-related delays in the East and Midwest, where storms fired up across flight paths during the stretch of stormy weather.

Outside the Northeast, travelers faced more sporadic disruptions Monday.

Hit-and-miss thunderstorms to created off-and-on problems across parts of the South. Houston Bush Intercontinental and Dallas/Fort Worth, for example, each saw weather-related delays pop up during the day, according to the Federal Aviation Administration

On the West Coast, low clouds and reduced visibility slowed flights at Los Angeles and San Francisco by about 30 to 60 minutes,…