Alaska Airlines said it expects a six-percentage-point hit to revenue in the second quarter. The carrier, which merged with Hawaiian Airlines last year, said it wouldn't update its full-year forecast because of "economic uncertainty and volatility,

The outlook came as the airline posted a wider loss and lower-than-expected revenue in the first quarter. Shares fell after-hours.

Alaska Airlines said it is expecting a six-point impact to its revenues in the second quarter due softening demand.