LONDON—Delta Air Lines Inc. said Monday it has suffered a computer outage through its system, leaving passengers unable to check in and grounding its flights globally.

The No. 2 U.S. carrier by traffic said via Twitter that "our systems are down everywhere."

Delta said in a statement it had "experienced a computer outage that has impacted flights scheduled for this morning. Flights awaiting departure are currently delayed. Flights en route are operating normally."

The airline's shares were hit last week when the airline reported a sharper than expected drop in passenger unit revenue for July. Shares in Delta are down more than 25% this year amid a wider slump in airline shares over concern of overcapacity.

Delta is advising travelers to check the status of their flights this morning while the issue is being addressed.

Write to Robert Wall at robert.wall@wsj.com

(END) Dow Jones Newswires

August 08, 2016 05:35 ET (09:35 GMT)

Copyright (c) 2016 Dow Jones & Company, Inc.
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