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David Zalubowski

Low-cost airline Frontier today filed for an initial public offering, which means it likely plans to go public sometime in May. The Denver-based company last year flew 14.9 million passengers through 59 airports in the U.S., Mexico and the Caribbean.

Top line: The Denver-based carrier's income statement reflects its budget sensibilities, with $200 million in net income on $1.7 billion in revenue. This is up from $146 million of earnings on $1.37 billion in revenue in 2015.

Why the improvement? Three factors jump out. First, the average cost of fuel fell from $1.90 per gallon to $1.59 per gallon. Second, the average number of passengers per departure climbed from 154 to 173. then there is "non-ticket revenue" (i.e., booking fees, baggage fees, on-flight purchases), which jumped from $401 million to $726 million.

Market: Airline stocks have been major beneficiaries of the "Trump Bump," judging by the most popular airline ETFs. Budget airline rival Southwest recently hit an all-time high, while Spirit Air remains well below its 2004 highs (but still is up for the past year).

Go deeper

Tina Reed, author of Vitals
4 hours ago - Health

FDA panel endorses shot of J&J booster for adults

Photo: Wolfgang Kumm/picture alliance via Getty Images)

Members of the Food and Drug Administration's vaccine expert panel on Friday unanimously endorsed a booster shot for adult recipients of Johnson & Johnson's COVID-19 vaccine at least two months after the initial dose.

Why it matters: The advisory committee raised concerns about a dearth of data to support their decision but ultimately decided to support an additional shot for those over 18.

Capitol Police officer indicted for obstructing Jan. 6 investigation

Trump supporters clash with police and security forces as people try to storm the Capitol on Jan. 6. Photo: Brent Stirton/Getty Images

A U.S. Capitol Police officer has been indicted on obstruction of justice charges for allegedly helping hide evidence of a participant's involvement in the Jan. 6 riot.

Driving the news: Officer Michael A. Riley, 50, is accused of telling the unidentified participant, referred to as "Person 1," in the Jan. 6 riot to delete posts from Facebook, which showed them in the Capitol during the attack.

7 hours ago - World

British MP dies after being stabbed while meeting constituents

Police outside Belfairs Methodist Church in Leigh-on-Sea, England, on Oct. 15. Photo: John Keeble/Getty Images

David Amess, a Conservative Party lawmaker in the U.K., was fatally stabbed Friday while meeting with local constituents in a church in eastern England, according to AP.

The big picture: Police said a man, 25, was arrested for the stabbing in Leigh-on-Sea and is being held on suspicion of murder. A knife was also recovered at the scene, authorities said.