U.S. airline stocks rallied, with the S&P Composite 1500 Passenger Airlines Index advancing 3.5%, after crude oil prices fell more than 7%. This decline in oil prices boosted expectations for lower fuel costs for airlines. Individual airlines saw significant gains, including JetBlue surging 6.5%, United and Alaska Air gaining 4% each, American Airlines rising 3.7%, Delta adding 3.5%, and Southwest climbing 2.4%.