Excessive heat warning issued for part of the viewing area

Refunds coming to Delta passengers disrupted by massive delays

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

Travelers are experiencing major flight delays at La Guardia airport after Delta's system-wide computer outage.

NEW YORK (CNNMoney) — It’s been more than 48 hours since Delta suffered a massive power outage that grounded all its planes Monday morning, but the travel nightmare isn’t over for some fliers.

Flight cancellations and delays are still plaguing the airline.

After canceling around 800 flights on Tuesday, Delta said it would start Wednesday with more than 150 canceled flights.

Passengers whose flights have been canceled or “significantly” delayed due to Monday’s glitch are entitled to a refund.

Fliers who were traveling Monday, Tuesday or Wednesday and want to rebook can do so without a fee as long as they depart on or before Sunday, August 21.

Anyone who rebooks for a flight that leaves after August 21 could end up paying any difference in fare, but won’t have to pay the change fee, which is normally $200 for U.S. travel.

Passengers whose flights are canceled or delayed more than three hours will also get a $200 travel voucher for future travel.

Delta didn’t say how it would define a “significant” delay. A spokesperson said passengers should reach out to reservations for more information. The number is (800) 221-1212.

The massive power outage started around 2:30am ET on Monday and left flight airport departure and arrival screens on the fritz. Some passengers were stuck on the tarmac.

The ground stop was lifted before 9:00 am ET on Monday, and some departures resumed, but Delta warned that cancellations and delays would continue.

Notice: you are using an outdated browser. Microsoft does not recommend using IE as your default browser. Some features on this website, like video and images, might not work properly. For the best experience, please upgrade your browser.