It takes one hour and 45 minutes to fly from Shenyang, a sprawling provincial capital in northeastern China not far from the border with North Korea, to Seoul, the capital of South Korea. It’s the kind of flight in which passengers have to gobble down their beef and rice before the attendants come around telling them to stow their tray tables for landing.

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But for the North Koreans who escape from Kim Jong Un’s regime, by way of China, there is no quick flight onward.

(Video provided by Reuters)

Instead, they embark on a grueling journey that — best-case scenario — involves traveling almost 2,700 miles on buses, motorbikes and boats, in taxis and on foot over mountains, on a roundabout route that scores of North Koreans each month are embracing as the best possible way to reach South Korea, where they will immediately become South Korean citizens.

© Paula Bronstein/For The Washington Post North Korean defectors look out at the Mekong river bordering Laos after arriving safely in Thailand. For most, the journey will first pass through China, Vietnam and Laos, where they must be on the alert for police who might arrest them and send them back the way they came — to certain and brutal punishment in North Korea.

Not until they cross a fourth frontier from Laos into Thailand are they are finally safe.

Kim, the young and tempestuous North Korean leader, is issuing increasingly shrill threats to the outside world, flying missiles over Japan and threatening to strike the United States.

For the people of North Korea, his threats are not just bluster. They are a very real part of daily life.

Behind the visible salvos of missiles, ordinary North Koreans are risking their lives to make this invisible journey out of Kim’s clutches and to safety.

The Thai authorities do not send them back. Instead, they will slap them with a minor immigration violation and alert the South Korean Embassy in Bangkok, which will start the process of transferring them to Seoul — not far from where many started their journey. There, they will start a new life, one of constant Internet connectivity and white rice every day.

“I want to learn all about computers,” said a 15-year-old boy who had arrived in Thailand from Laos, just 12 days after escaping from North Korea. “I want to become a computer expert.”

“I want to be good at computers too,” chimed in his 8-year-old sister, who was playing with an imitation Barbie that a humanitarian worker had given her on arrival in Thailand. It was the first doll she had ever owned.

© Paula Bronstein/For The Washington Post A girl brushes the hair of a new doll that she got as a gift after arriving to Thailand. The brother and sister were two of the 11 North Koreans who told their story to The Washington Post of their escape after arriving here, on the Thai side of the Mekong River, before turning themselves in to the police.

The North Koreans asked to withhold their names and other identifying information to avoid putting their family members still in North Korea at risk of retribution from the Kim regime.

They were recovering from the last leg of their terrifying journey out of North Korea, which started with a dead-of-night escape across the water into China and culminated in a boat ride across a swollen Mekong, which washed them way downstream from where they were supposed to be dropped.

After they had spent hours in the rain, not knowing where they were, the activist who had helped them escape finally found them.

They slept overnight in a spartan hotel room here and ate hot food and changed into dry clothes. Then, the following morning, with an air of anticipation, they turned themselves in to the police.

They were processed, then joined about two dozen other North Koreans in holding cells.

It was a muggy day. In two of the cells, women and children — including the little sister who got the Barbie and a baby who had just started walking — fanned themselves on mats on the floor and ate sunflower seeds. The pink bars had been turned into a makeshift washing line, and the girl had hung up her doll’s dress on it.

A third cell contained a handful of men and the wannabe computer nerd.

Once there was a busload of them, as more North Koreans arrived nearly every day, they’d all be driven 12-plus hours to Bangkok.

The 11 who talked to The Post said that, throughout their perilous escape, they had been focused on this moment — on the moment they would get to the safety of this humid and smelly cell, the moment the South Korean bureaucracy would whir into action.

© Paula Bronstein/For The Washington Post Ji Seong-ho stands by the Mekong River bordering Laos. In the background are the North Korean defectors. Ji is a North Korean defector now living in Seoul as a human rights activist. He lost his arm and leg failing off a train when he was homeless during the famine. Ji founded the organization Now Action and Unity for Human Rights, helping North Koreans who are still in the North as well as those who have escaped, living in the South. Risking all for freedom

It was the experience of crossing back and forth into China, unrelentingly capitalist China, that made the fisherman decide to flee from North Korea. He was earning a good living, plying the seas as his official job and transferring money across the border as his unofficial one. But seeing how Chinese people lived and listening to South Korean news on a radio he’d bought across the border had opened his eyes.

“I realized that what we were told by our media was all lies,” he said the night before they surrendered to police.

For the 50-year-old woman from the North Korean port of Nampo, it was the fear of being repatriated to North Korea again — she’d just spent 2½ years in a re-education camp — that made her carry on after she made it back to China.

For the 23-year-old school friends from the border city of Hyesan, being sold to Chinese men — knowingly or unknowingly — was the way to make money for their families. “I knew I was going to be sold, but I was prepared to go,” said one, looking up from her smartphone.

Her friend, a hairdresser, had gone to China several months before. She thought she was going to work in a restaurant but instead was sold to a Chinese man for $12,000.

For all these reasons and many more, North Koreans cross the river into China.

Untold thousands risk their lives to escape each year. Some live in hiding in China, some get caught and repatriated, and some — 1,418 last year — make it out to safety in South Korea.

When Kim Jong Un came to power at the end of 2011, at the age of only 27, many North Koreans hoped he would usher in a new era of modernity and openness for the totalitarian state.

That didn’t turn out to be the case.

Kim has ordered a merciless crackdown on the long border with China, and Beijing has stepped up its own vigilance. The flow of people has dropped markedly — but not altogether.

A vast network of brokers, many of them defectors from North Korea themselves, arrange escape through a system that is now so well-oiled that, if everything goes smoothly, a North Korean can be in a Thai detention center within 10 days and in South Korea within a month.

That’s if everything goes right.

© Paula Bronstein/For The Washington Post A North Korean defector holds some tissue as she cries talking about her compelling story from a hotel room, resting after arriving safely in Thailand. After finding a broker, North Koreans who have earned money through private trading pay up front for their escape. Others promise to pay with the settlement money they receive after arriving in South Korea. A lucky few have their escapes financed by Christian organizations.

The group containing the fisherman was rescued by Now Action and Unity for Human Rights, an organization led by Ji Seong-ho, himself a North Korean who escaped. Ji’s outfit arranged to pay $2,000 to get each member of the group out. Contacting a broker directly would have cost double that, he said.

The group crossed the river into China at night to find two cars waiting to take them to two safe houses — just as their broker had said.

“By the time we arrived at the house, it was getting light outside,” said a 42-year-old housewife. “We stayed there for three days, just eating and sleeping and watching Chinese TV until it was time to go.”

They were going to take a new route, through Vietnam rather than directly through Laos, because Chinese authorities had become more aggressive near the Laos border.

“I was worried that we were being used as guinea pigs on the route. But if we were going to die, we were going to die,” the fisherman said. “We had already decided to kill ourselves rather than be sent back to North Korea.”

The group was then put onto the first of many buses for a 17-hour-long journey. “That was nothing — we spent more than 80 hours on buses in China,” the housewife laughed.

Being on a bus was dangerous. If Chinese police boarded to check their documents, the North Koreans would be busted. “We didn’t sit together, and we didn’t speak to each other while we were on the bus,” the housewife said. “Nobody bothered us because they thought we were sleeping the whole time.”

These escapes are usually coordinated by someone in Seoul managing the tricky logistics.

“We have to know the exact locations of checkpoints. We need to be able to tell them where to wait and when to cross,” said Kim Sang-hun, a Seoul-based Christian activist who helps North Koreans escape.

“They can be arrested anywhere at any time, and the situation is going to be very bad for them. So to bring them to safety, we have to know the local bureaucracy and find a way to get around it.”

Yet this was the easy leg of their journey. Many North Koreans speak some Chinese, either through living in China or by trading with China, and their similar looks mean they can blend in with the local population.

Yet when they got to the bus station closest to the border with Vietnam, the atmosphere changed. Police were patrolling the border in force, so their guides told them to take cover and then be prepared to run through the dark.

Hiding between buildings, waiting for their moment to cross, the North Koreans were being as still as they could be. The guides were gesturing at them not to move. They didn’t need to have a common language — their body language spoke volumes. When the moment came, they ran. And they were across.

The hardest part was still to come. After several more bus and car rides through Vietnam, the North Koreans had to hike through the mountains along the border with Laos, through torrential rain.

“Every step of the escape is hard and dangerous — hiking mountains, changing methods of transportation and crossing borders,” said Ji, the activist who now helps his compatriots escape. “Because they’re so tense, some fall ill during or after the escape.”

The journey is especially onerous for children, the elderly and the disabled, he said. Mothers sometimes give their children sleeping pills so they won’t cry and give them up.

© Paula Bronstein/For The Washington Post North Korean defectors in a hotel room, resting after arriving safely in Thailand. Three men with flashlights were waiting to lead the group over the mountain paths. It was raining hard, and they were all soaked through. The paths were slippery and treacherous. It was pitch black.

“We were told we were supposed to go over two mountains, but I think it was three,” said a young mother who had left her 4-year-old daughter behind in China while she made the escape. “It was really hard, and I was so scared I thought I was going to die from fear.”

The 50-year-old woman from Nampo said the border crossings were the most terrifying part. “I kept thinking: What would happen if I get caught now?” she said. “If I was repatriated again, I knew that it would be the end of my life.”

They did make it into Laos, and there was another car waiting for them at the border. The driver’s nerves put them on edge. He was afraid of being stopped by the police with the North Koreans in his car, and his fear was contagious.

Most unnerving of all was the reality of being so close to safety but still not quite there. “I kept thinking: Imagine if I made it this far and then I got caught in Laos,” the young mother said.

Just four hours to the Mekong River and, across it: Thailand.

Their clothes still wet from the mountain crossing, the group was dropped on the river bank in the pouring rain. There, they waited in the darkness until it was time to cross.

At 3:30 a.m., they got into one of the long boats that navigate the Mekong. The heavy rains had made the river high and fast, and they were dropped 20 miles downstream from where they were supposed to go ashore.

“There was nobody around, nobody waiting for us,” the housewife said. “Up until that time, everything had worked perfectly.”

But for the fisherman, it didn’t matter. “I was so relieved to be in Thailand. I sat by the river and smoked some cigarettes.”

Ji, the man waiting upstream for them, started out on a frantic, hours-long search. He heard from the coordinator in Seoul that they’d crossed and realized they’d missed their drop point, but he didn’t know where they were. And they, not being able to read Thai, didn’t know where they were either.

Luckily, as one of the women in the group had a Chinese cellphone, Ji eventually found them and took them to the nearby hotel, where a hot shower and dry clothes awaited them.

That Saturday night, before they turned themselves in at the police station, they had a celebration. They pushed back the beds in the hotel room, and the housewife cleaned the tiled floor. They sat crossed-legged and ate sticky rice, grilled fish, fried chicken and banana chips, all washed down with large cans of Chang, a Thai beer.

The 8-year-old played with a reporter’s phone, delighting in photo filters that gave her bunny ears or a crown of flowers.

Not far to South Korea now.