The Australian needed one hour and 31 minutes on court to defeat Korda 6-2 6-4, meaning he triumphed at 's-Hertogenbosch without dropping a set in any round.
Back-to-back breaks got De Minaur through the opener, and though Korda hit straight back following another break early in the second, De Minaur kept the pressure on and got his reward in the sixth game.
De Minaur forced 14 break points overall while saving four of the six he faced, with Korda producing 26 unforced errors in an erratic performance.
Data Debrief: De Minaur enjoying productive year
After beating Casper Ruud to win the Mexican Open final in February, De Minaur has won multiple ATP crowns in a single year for the third time, also triumphing at Sydney, Atlanta and Zhuha in 2019 and in Antalya and Eastbourne in 2021.
He had already clinched a new career-high ATP ranking of eighth with his semi-final win over Ugo Humbert, but he will now rise to seventh on Monday after lifting the trophy.
De Minaur – the top seed for the ATP 250 tournament in the Netherlands – needed one hour and 46 minutes to wrap up a 7-6 (7-4) 6-3 success over the world number 16, having thrown away a 4-0 first-set lead before holding his nerve in a tiebreak.
The second set was cagey as De Minaur did not give up a single break point and converted one of two he forced, some strong serving ensuring he held off his opponent.
He will face Korda in Sunday's final after the American ended Tallon Griekspoor's title defence at the semi-final stage earlier on Saturday, winning 6-2 6-4.
Meanwhile, Jack Draper will face Matteo Berrettini in the final of the BOSS Open in Stuttgart, having beaten Brandon Nakashima 6-3 6-3 in the semi-finals.
Former Wimbledon runner-up Berrettini came through an all-Italian clash with Lorenzo Musetti in just 67 minutes, winning 6-4 6-0.
Data Debrief: New high for De Minaur
De Minaur is into his 17th ATP Tour-level final, having an 8-8 record in his previous 16. It will be his third on grass, after beating Lorenzo Sonego in Eastbourne in 2021 and losing to Carlos Alcaraz at Queen's last year.
The victory also ensured he will rise to eighth in the world rankings – a new career-high position.
Defending champion Mannarino had won eight matches in a row at the ATP 250 event, which was last held in 2019, but he fell 7-5 7-5 to Medvedev in a match lasting a little under two hours.
Top seed Medvedev, whose most recent appearance in a final came at the Australian Open in January, will now face home favourite Tim van Rijthoven on Sunday.
"Adrian plays good, and some games in this match I was like: okay, I can't do anything," said Medvedev, who will reclaim top spot in the ATP rankings next week.
"I had to just continue playing my tennis. He was unbelievable sometimes, missing sometimes, so I just continued my game, and it managed to work today."
Medvedev was far from his best against flat-hitting Mannarino, with the first set featuring five breaks of serve, but the 26-year-old did enough to edge in front.
After wasting a chance to serve out the match in the 10th game of the second set, Medvedev edged a mammoth 11th game and avoided any sort of scare to advance through.
The Russian will next face a different sort of test against Van Rijthoven after the Dutch wildcard stunned second seed Felix Auger-Aliassime earlier on Saturday.
Van Rijthoven, who had not won a match at tour level until his opening-round win over Matthew Ebden, prevailed 6-3 1-6 7-6 (7-5) in a thrilling semi-final.
After sharing the first two sets, Van Rijthoven wasted six break-point opportunities in the decider, but he held his nerve in the tie-break to keep his dream run going.
He is the first Dutchman to reach the final in 's-Hertogenbosch since Raemon Sluiter in 2009.
Murray started his preparations for the grass-court swing with a run to the semi-finals of the challenger at Surbiton.
He knocked off seventh seed Alexander Bublik to reach the last eight in Stuttgart but a meeting with the top seed and world number five represented a much more imposing challenge.
It was one the two-time Wimbledon champion rose to emphatically, winning a first-set tie-break and then claiming the second set in comfortable fashion to cement a 7-6 (7-4) 6-3 win, gaining revenge for his contentious five-set defeat to the Greek at last year's US Open.
Murray's previous win over a top-five opponent came in the ATP Finals six years ago, when he defeated Novak Djokovic in a year that also saw him win Wimbledon.
"I thought I did well. He served unbelievably in the first set," Murray said in his on-court interview.
"I felt like I had very few chances, but when he was creating chances on my serve, I stayed strong.
"I played a really solid tie-break and in the second set, once I was in the rallies, I felt like I was dictating a lot of the points. It was a good performance."
Murray is up to 53rd in the live ATP rankings and is bidding to get back into the top 50 for the first time since 2018.
Standing between him and a place in the final is Nick Kyrgios, who was 7-6 (7-3) 3-0 up when Marton Fucsovics retired from their quarter-final clash.
Matteo Berrettini beat Lorenzo Sonego in three sets, while Oscar Otte won by walkover against Benjamin Bonzi.
At the Rosmalen Grass Court Championships in 's-Hertogenbosch, Daniil Medvedev saw off Ilya Ivashka 7-6 (10-8) 6-4.
Medvedev, who will soon return to world number one when the ranking points from the French Open come into effect, sees the grass-court season as a chance to cement his grip on that spot.
"I don't have many points to defend on grass and I have some to win, so hopefully I can play well, starting here," said Medvedev. "Every round is points and the higher you get, the more you need to step up."
He will face defending champion Adrian Mannarino in the semi-finals, while second seed Felix Auger-Aliassime is into a last-four clash with home hope Tim van Rijthoven after beating Karen Khachanov.
Osaka's match was interrupted by rain early on with her in the lead, but Andreescu came back out in top form to take the first set.
The Japanese raced through the second though, taking a 5-0 lead before holding off Andreescu's fightback to go into a decider.
Despite an impressive comeback to force a tie-break in the final set, Osaka became sloppy, with her mistakes contributing to the Canadian's path into the semi-final, where she will face Dalma Galfi.
Elsewhere, Alex de Minaur is through to the semi-finals after a comfortable straight-sets victory over Milos Raonic.
Despite a long break due to bad weather, the Australian eased into the next round with a 7-5, 6-2 victory on Friday.
He will face either Ugo Humbert or Gijs Brouwer in the next round.
Data Debrief: Osaka not close enough, De Minaur in cruise control
Despite winning more points (98 compared to 94), and winning more games (16 to 15), Osaka could not hold her nerve in the tie-break to reach the semi-finals.
Competing as the top seed for the first time in his tour-level career, De Minaur felt no pressure as he rallied in the second set to ensure Raonic would not find a way back into the match, winning his last five games in a row on his way to victory.
The American pulled out of the French Open due to back and neck injuries that have kept her out since April but made her return with a 6-2, 6-2 win in just 58 minutes.
Sasnovich matched Pegula in the opening four games, with both players trading points, but the world number five soon gained her foothold to cruise through the rest of the first set.
Pegula remained in control in the second, despite Sasnovich's late attempt at a comeback, but the Belarusian could not do enough to stop the top seed from advancing.
Pegula will now face Aleksandra Krunic or Jessika Ponchet in the next round.
Data Debrief: Pegula puts injury worries behind her
Pegula last played in America's Billie Jean King Cup victory in April, but she showed no signs of rustiness on her return to the court.
She showed no signs of rustiness though, hitting nine winners and just six unforced errors on her way to sealing her victory.
Second seed Raducanu conceded the match after 36 minutes having sustained an injury to her left side while down a break at 4-3 in the opening set.
The 19-year-old is scheduled to appear at Birmingham next week before heading to Wimbledon, where she reached the fourth round last year.
US Open champion Raducanu, who made her WTA Tour debut in Nottingham last year, is unsure if she will recover in time to feature at the All England Club.
"I think I pulled something, I am not really sure what exactly happened," Raducanu said.
"I have just come off court, an absolute freak injury. I don't know what I could have done more about it. That is it.
"I have no idea [about Wimbledon]. It could have just seized up and gone into spasm and then it is really bad for a few days. I have no idea. I cannot diagnose myself. I will get it checked out."
Raducanu was the only seed to exit the tournament, with top seed Maria Sakkari overcoming Camila Osorio 6-2 6-3 to advance to a second-round meeting with Rebecca Marino.
Beatriz Haddad Maia came from a set down to beat Wang Qiang 5-7 6-4 6-3, while Ajla Tomljanovic and Camila Giorgi had comfortable victories against Wang Xinyu and Sonay Kartal respectively.
Aryna Sabalenka cruised into the second round of the Rosmalen Grass Court Championships by defeating Kateryna Baindl 6-4 6-1.
Fifth seed Liudmila Samsonova, meanwhile, succumbed to a 6-3 6-4 loss to Ann Li in an hour and 22 minutes.
There would have been further casualties among the seeds had Tamara Zidansek, Ekaterina Alexandrova and Elise Mertens not fought from a set down to win their opening matches.
