Lets assume there's a space station already built, so this would be a flight off earth, brief acceleration, coasting most of the way, brief deceleration and connect with the station. I'm assuming one or two captured asteroids are already at L4 providing basic materials like Water, Oxygen, Nitrogen, CO2, Metals and Silicon for solar panels, so it doesn't have to be an ultra heavy launch from Earth, but moderately heavy, maybe 2 astronauts and some equipment.
And the theoretical station could orbit L4 or L5 so it would have closer and further from the Earth. The journey wouldn't need to go all the way to the L4 point, 60 degrees ahead but could meet up at say, 45 or 50 degrees.
Using this article as a baseline, it says 260 days is a standard estimate to fly to Mars though faster is possible but difficult. It doesn't say how long the journey is, but eyeballing it, it's a bit more than half way around earth's orbit, so probably a little over 500 million km.
Using the times listed in this article, NASA has already sent ships to land on Mars in as little as 200 days - Mars Odyssey and taking less time, the distance was probably shorter as well. I'm not an expert in such things, but I'm guessing the weight of the payload was probably on the light side to make it in 200 days, for carrying passengers and some equipment current Mars estimates are probably more like the 260 day estimate (as a guess).
A journey to about 50 degrees ahead or behind Earth's orbit would be considerably shorter. maybe as little 75 or 80 million km to dock with my theoretical space station. I get a ballpark estimate of about 50 days. My question is, is that about right or is there something about the L4 or L5 trip that I'm overlooking? Like, it might take longer because the ship would have to fly closer to the sun before it coasts to L4 due to it's higher velocity.
The STEREO missions are probably not relevant as they took much longer.
Any additional relevant information on current or under development ship/engine designs and how that might affect time of travel would be appreciated. Thanks.