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Passengers outside LAX terminal as Spirit Airlines canceled hundreds of flights earlier this week. Photo: Al Seib/Los Angeles Times via Getty Images

It's been the travel week from hell for Americans across the country.

Driving the news: Low-cost carrier Spirit Airlines was at the forefront of a disastrous few days of flight cancellations.

  • It was a perfect storm of bad weather, IT outages and not enough people to staff flights — as airlines face a surge of travelers.

By the numbers: Spirit was responsible for 80% of all U.S. flight cancellations on Thursday — when it canceled more than half of its schedule, per data from Flight Aware.

  • The tally: over 1,700 nixed flights this week, with another 300 canceled as of midday, CNN reports.

What they're saying: "There will still be cancellations over the next few days, but we can start to build back to a full operation," CEO Ted Christie told ABC News.

American Airlines also canceled hundreds of flights this week — fallout from a weekend storm that hit Dallas, its biggest hub.

Go deeper

Piedmont Airlines flight attendants vote to authorize strike

Unionized flight attendants for American Eagle carrier Piedmont Airlines protest outside Philadelphia International Airport. Photo courtesy of Natalie Sowinski/Philadelphia Council AFL-CIO

Flight attendants for an American Airlines subsidiary with a base in Philadelphia voted to authorize a strike Thursday.

Driving the news: Members of the union representing flight attendants for American Eagle carrier Piedmont Airlines picketed outside Philadelphia Airport (PHL) following the vote, according to the Association of Flight Attendants-CWA.

Why it matters: AFA's strike strategy "could affect the entire system or a single flight," the union said in a news release.

  • "Even the disruption of a few flights could threaten operations across the American Airlines Group system," AFA said.
11 mins ago - World

Iran agrees to resume Vienna nuclear talks in November

Ali Bagheri (R) with Enrique Mora in Tehran on Oct. 14. Photo: Iranian Foreign Ministry handout via Getty

Iran's new chief nuclear negotiator said following a meeting in Brussels on Wednesday that Iran would resume negotiations in Vienna before the end of November, with the exact date to be set next week.

Why it matters: The Vienna talks have been frozen since Iran's new hardline president, Ebrahim Raisi, was elected in June. This is the most direct commitment from Raisi's government to return to the negotiating table.

Dan Primack, author of Pro Rata
5 hours ago - Politics & Policy

Democrats' billionaires tax explained

Illustration: Aïda Amer/Axios

There is now legislative language behind the push to tax American billionaires on unrealized capital gains, as Sen. Ron Wyden last night released his 107-page plan.

Why it matters: This would be a sea change in U.S. tax policy, which has only applied to realized gains (otherwise known as income).