In MCU movies, Thor, Loki, and Odin are not really gods, if I am right; they are more like an alien race with super powers.
Compared to people on earth, how old are Thor, Loki, Odin, and Asgardians in Earth years? Hundred-thousand years old or more? Are their lives limited? If they don't get killed, will they be considered immortals?
From Wikipedia article about Thor (so basically the comic version) :
Like all Asgardians, Thor is incredibly long-lived and relies upon periodic consumption of the Golden Apples of Idunn to sustain his extended lifespan, which to date has lasted many millennia.
From MCU wiki page in a sidebar there are basic info about Thor (the film version). There we see:
Age: Over one thousand years.
Powers and abilities:
[...]Thor trained and skilled in the arts of battle, which he has practiced for thousands of years.[...]Superhuman Longevity: Thor, like all other Asgardians, is not truly immortal. It is possible to kill an Asgardian and other beings in the Nine Realms. More accurately, Asgardians are extremely long-lived beings. Thor ages at a pace far, far slower than a human, as he is at least 1,000 or more years old; more than likely, like Loki, born shortly before the last great war between the Asgardians and the Frost Giants.
As for Loki:
Age: 1051-1052
Powes and abilities:
Superhuman Longevity: Loki has the capacity to live for thousands of years. Loki was a baby at the end of the last great war between the Asgardians and the Jotuns, over a thousand years ago.
As for Odin:
Age: Thousands of years.
Powers and abilities:
Superhuman Longevity: Odin ages at a rate that is much slower than that of a human being. Even though he is thousands of years old, he still in very good health, greatly belying his appearance. When he died, he was over 5.000 years old if not older.
In the Avengers Infinity War, Thor himself says he is 1500 years old. (I can't find an online transcript at the moment, but I watched the movie yesterday, and he clearly said it.)
In Thor: The Dark World Odin and Loki have the following exchange:
Odin: We are not gods! We're born, we live, we die, just as humans do.
Loki: Give or take five thousand years.
Now Loki isn't saying they LIVE for 5000 years. He's saying they live for some OTHER time, probably longer, with an average deviation of 5000 years.
In Ragnarok Thor comments to Surtur "I thought my father killed you half a million years ago".
It's also mentioned outside the MCU that the creation of Mjolnir was what killed the Dinosaurs.
An exact number is gonna be tough to produce but I'm thinking pretty old.
You are right that the Asgardians are more like a highly advanced alien race with superhuman abilities. They do have a lifespan, but it is much longer than that of humans. As Odin says in Thor: The Dark World, "We are not gods! We're born, we live, we die, just as humans do." Loki adds, "Give or take five thousand years."
Based on the movies and the official MCU timeline book, we can estimate the ages of some of the main Asgardian characters:
REDLINE ALERT!
Hello there! Thor tells Surtur, "I thought my father killed you half a million years ago." Now, we know Asgardians live a long time, but do they live that long? It's hard to say how long Odin has been around, 'cause sometimes he falls into the Odinsleep.
- Marvel Studios’ The Marvel Cinematic Universe: An Official Timeline
So, to answer your question, Thor, Loki, Odin, and the Asgardians are very old in Earth years, but not immortal. They can die of old age, or injury, just like humans. This is confirmed by the Time Variance Authority (TVA) (introduced in the Loki TV series), the organization that monitors and maintains the main MCU timeline, also known as the “Sacred Timeline”, as their AI mascot, Miss Minutes, explains. From the Official Timeline:
TVA ALERT!
Hey there! How long do Asgardians live? That's a great question! As Odin the Allfather will one day explain, they exist for a very long time but aren't immortal. He says they are born and die just like regular folks, but his son Loki adds: "Give or take 5,000 years." That's a whole lotta wiggle room!
In the comics, Odin was one of the Avengers of 1Mil BCE. Could be 1mil+
Or, in the movies, it's said that Asgardians live for about 5k years.
In human years Loki is estimated to be around 17, but in Asgardian years he is about 1,000, I'm guessing nothing under 800 though. And as for Thor, I watched Infinity War April 27th, and in one part he says he is 1,500 years old.So either way, they are both pretty old. As for Odin I am not so sure, I'll elaborate on him once I find out more information. And since people haven't been able to make screen caps of Infinity War, because spoilers, I can't find him saying it. I think we'll have to wait a bit until a lot more people have watched it though until we get the screen caps. Until then, we wait. :D
