The Times says it has learned that airlines are to be prevented from "ripping off passengers with last-minute hidden fees".
Ministers are said to be drawing up measures to stop passengers being hit by unexpected charges of up to £160 to change the name on a booking, print boarding passes or check-in luggage.
The Daily Mail meanwhile accuses four of the biggest insurance companies of raking in more than £800m from what it calls "rip-off extras".
It says the industry-wide figure is likely to be far higher. The firms insist customers are treated fairly.
The Mail sees it as "another victory" in its 10-year campaign against plastic pollution.
The papers explain that people will be able to put bottles into so-called "reverse vending machines" which will read the barcodes on them and print out a coupon.
The Daily Telegraph leads with a prediction that cars will travel slower than bicycles on congested roads within a decade.
It comes from the Department for Transport, which says average speeds on A-roads in towns and cities dropped to just 18.4mph in 2017 - down from 19.3mph in 2014.
The Department for Transport says if this rate of decline continues, by 2027 cars will be travelling slower than 16 mph - the average speed of a male cyclist.
There's extensive coverage in French papers of the killing of three people in Aude by a man claiming allegiance to Islamic state, or Daesh.
"Once again," says Le Figaro, "Daesh strikes at the heart of France. The much-feared scenario of a terrorist attack in a quiet provincial town has caused dread across the country."
Le Monde says the killer, who was shot dead, was a loner and a small time drug dealer.
There are many tributes to the heroism of the gendarme, Arnaud Beltrame, who took the place of hostages and who died overnight from the bullet wounds he suffered.
His mother is quoted in Le Parisien saying: "I knew it was inevitably him; it's his reason to live, to defend the homeland. He would say to me: I'm doing my job mum."
The Guardian leads on its interview with Cambridge Analytica employee Brittany Kaiser.
The paper says her revelations about the company's work for the Leave.EU campaign will add to the pressure on the company's chief executive, Alexander Nix.
The Financial Times highlights the decision by Elon Musk to delete the official Facebook pages of his companies, Tesla and SpaceX, in response to "the data scandal engulfing the world's largest social network".
It contrasts this with the "general inaction" from other companies, something it attributes to the "addiction" that many corporate marketing departments have to the very kind of Facebook data at the centre of the scandal.
The Times reports that Britain's biggest tour operator, Tui, suspended its Youtube advertising on Friday night after its and other brands' adverts were shown next to videos teaching people how to shoplift.
According to the New York Times, President Trump decamped to his ocean front estate in Palm Beach on Friday, after what it calls "another week of chaos" which "left heads spinning".
West Wing staff apparently describe an atmosphere of "bewildered resignation" as they grapple with the task of "predicting and reacting in real time to the president's shifting moods".
The Politico website talks of Mr Trump's aides being "at their wits ends" over his unpredictable behaviour which has staff "worried about their own credibility".
However, according to the Matthew Parris column in The Times, "there's a brutish jingoism afoot in Britain and Brexiteers jumping on the passports bandwagon are playing to the gallery of ill-informed and authoritarian nativists."
Finally, according to the Sun a member of the nine-strong panel hired by the Department of Health to study the effects of the new sugar tax, once wrote on a blog that he believed God was calling him to work towards the introduction of taxes on soft drinks.
He's the academic and priest Professor Mark Rayner, who's insisted to the paper that the panel will evaluate the tax on its merits.
However, the Sun describes him as "holy unsuitable" to "judge whether this nanny-state levy works".