Article: Up to 170,000 people were in the city on Saturday to see Spanish holders Real Madrid beat Italy's Juventus 4-1 in the world's biggest club football match.
Many flights left Cardiff and Bristol airports overnight while those using trains had waits of up to 45 minutes, but were offered blankets and sweets.
South Wales Police said three people were arrested over ticket touting.
A 35-year-old from Napoli was arrested on Friday after a tip-off from an off-duty Italian officer and he will appear before city magistrates on Monday.
On Saturday, two other men, aged 32 and 28, were arrested on suspicion of fraud after being found with four tickets and a significant quantity of money. They remain in police custody.
Most roads have reopened following wide-scale closures in the build-up to the final.
Castle Street will remain closed until Monday morning, as will Lloyd George Avenue and the immediate roads around the Champions Festival in Cardiff Bay, which ends on Sunday.
Organisers said more than 60,000 fans went to the festival on Thursday and Friday with another capacity crowd flooding in on Saturday.
Supporters of Juventus and Real Madrid mixed in a friendly atmosphere at the festival in Cardiff Bay on Saturday afternoon ahead of the game's big kick-off at the National Stadium of Wales.
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Summarize: Thousands of fans have headed home after Cardiff hosted the Champions League final.
Problem: She has been invited to give a speech at Stanford University on Scotland's place in the world.
The Scottish Conservatives have questioned Ms Sturgeon's priorities, saying she should "get back to the day job".
The first minister will also meet Governor of California Jerry Brown to discuss climate change.
Mr Brown has criticised President Trump for his executive order overturning many climate change policies introduced by President Obama.
The Scottish parliament has started its Easter recess.
A Scottish government spokeswoman said: "The First Minister's visit will focus on promoting trade and investment, boosting tourism, sharing best practice across the public and private sector and promoting Scottish innovation and entrepreneurship.
"The relationship between Scotland and America is an important one with deep and long-standing ties reflected by the strong economic, cultural and personal links of our citizens."
Conservative MSP Annie Wells said she fears the first minister will use the trip to promote Scottish independence.
She said: "The First Minister seems determined to talk about independence at every opportunity she gets.
"Rather than going abroad to try and sell her plans for separation, she should accept that Scots don't want a second independence referendum and get back to the day job of improving our health service and schools."
The start of the first minister's trip has coincided with further comments from the Spanish government about its attitude to Scotland joining the EU.
Spain has confirmed that it would not initially block any attempt from Scotland to join the EU after Brexit.
Foreign Minister Alfonso Dastis, however, said he remains opposed to independence.
Mr Dastis added: "Having said that, if, in application of its laws, the outcome of that process is a division of the United Kingdom, any part of the United Kingdom that becomes a state and wants to join the EU will have to apply. And follow the steps that are stipulated."
He warned an application for membership could take several years to be processed.
SNP MP Stephen Gethins said: "This is a significant intervention by Spain's foreign minister which confirms what other Spanish politicians have said previously.
"We can be now absolutely clear - there is no intention of a 'Spanish veto' over Scotland's EU membership.
"This is just the latest indication from a senior European diplomat that an independent Scotland would be welcomed into the EU, after Lord Kerr this week said that we'd be in 'very fast'.
"EU countries want to be constructive with Scotland and will respect the democratic will of the Scottish people if we choose to be independent."
The Conservatives have said the issue was not just about the exercise of a veto.
MEP Ian Duncan said: "The issue about an independent Scotland's EU membership has never been about an individual country's veto.
"The truth is the decision would rest in the hands of all 27 member states, each of which would undoubtedly ask for something from Scotland in return.
"This is likely to lead to sweeping concessions, especially for our fishermen. This would result in a hugely unfavourable deal, something considerably worse than the UK's membership of the EU prior to Brexit."
What was that article about?

A: Nicola Sturgeon is travelling to California, as part of a five-day visit to the United States.
Problem: Scottish Labour, the Scottish Conservatives and the Scottish Lib Dems said Scots did not want another ballot despite SNP claims it had a mandate.
Scottish Labour leader Kezia Dugdale dismissed claims she had not been clear on the issue.
And Ruth Davidson ruled out any second ballot until after 2021.
The SNP has said it has a mandate to hold a second referendum, despite the 2014 vote being a "once in a generation" event.
It said it included the right to hold another independence ballot in the event of a "material" change to Scotland's circumstances.
It insisted that the Brexit vote, in which 62% in Scotland voted to remain in the EU, a majority, albeit reduced at Holyrood last year, and a vote in March by the Scottish Parliament to stage another referendum, constituted a mandate.
Speaking on the BBC's Sunday Politics Scotland Ms Dugdale, who has previously said Labour MPs and MSPs could campaign for independence if a second referendum was staged, insisted she would block any second ballot.
She said: "Everywhere I go I meet people who are distressed, upset and worried about the instability a second referendum would cause and indeed the damage independence would cause.
"We have been very clear we are opposed to independence and a second independence referendum.
"The reality is now, our job is to block a referendum here in Scotland. Because the people of Scotland don't want it, nor do they want independence."
And Scottish Tory leader Ruth Davidson who has seen her party stage an electoral revival on the back of her vocal opposition to another independence vote, said she did not believe the SNP had a mandate for a second referendum.
She insisted on the programme that there was no "public consent" to hold another vote and if there had to be one it could only be after 2021 at the earliest.
She said: "the SNP are going to argue for another referendum till the cows come home. I don't accept they have a mandate. There has got to be both political and public consent for this."
And she said there could not be any second vote held until after a Brexit deal had been negotiated and its effects "played out on the ground" including the new powers devolved from the EU back to Scotland.
She added: "I am absolutely not going to advocate for this to be held in the next while or within the next generation."
And Scottish Lib Dem leader Willie Rennie joined in the chorus against staging a second referendum while campaigning in East Dunbartonshire.
He said: "The Scottish economy is teetering on the edge of a recession, the performance of Scottish education is dropping down the international rankings and mental health services are failing to deliver the care we expect.
"People should use their vote to change the direction of the country away from another divisive independence referendum."
But SNP deputy leader Angus Robertson, said there was only one way for Scotland's "voice to be heard" adding: "Scotland needs MPs who will speak up for what is right, not simply do whatever Theresa May tells them.
"Now more than ever, it is vital to have strong SNP voices standing up for Scotland at Westminster."
What was that article about?

A:
Leaders of Scotland's main pro-UK parties insist they would block any attempt to stage a second independence vote.