Atlas V is an active expendable launch system in the Atlas rocket family. It was formerly operated by Lockheed Martin, and is now operated by United Launch Alliance (ULA). Atlas V is built in 10 variants: Atlas V 401, 411, 421, 431, 501, 511, 521, 531, 541, 551. The first digit stands for fairing diameter in meters, the second digit stands for number of SRBs and the last digit stands for number of engines on the second stage. Atlas V 401 was used to launch few times Orbital ATK’s Enhanced Cygnus to International Space Station due to Anteres explosion investigation underway. Atlas V will be also used to launch crewed CST-100 Starliner on modified version N22 to International Space Station through Commercial Crew Development program. The vehicle operates out of Space Launch Complex 41 at Cape Canaveral Air Force Station and Space Launch Complex 3-E at Vandenberg Air Force Base. There was also considered Atlas V Heavy _ which would put two addiational Common Core Boosters on the sides of the first stage.

I recommend turning on "Advanced tweakables" in KSP settings.

To download each variant of Atlas V, go to the "Files" section.

Also Don’t forget to download the flags for Atlas V in the "Files" section.

Here are my other projects.

Atlas V 400 Series (401, 411, 421, 431)

Atlas V 400 Series

Atlas V 500 Series (501, 511, 521, 531, 541, 551)

Atlas V 500 Series

Atlas V N22 w/ CST-100 Starliner

Common Core Booster

Common Core Booster

Centaur III

Centaur III

AJ-60A

Atlas V 401
T-0:00:02 - Main Engine Ignition
T-0:00:00 - Lift Off
T+0:02:42 - Main Engine Cut Off
T+0:02:46 - First Stage Separation
T+0:02:54 - Second Engine Ignition
T+0:03:12 - Fairing Deploy

Atlas V 411
T-0:00:02 - Main Engine Ignition
T-0:00:00 - Solid Rocket Booster Ignition
T-0:00:00 - Lift Off
T+0:01:14 - Solid Rocket Booster 1 Jettison
T+0:02:42 - Main Engine Cut Off
T+0:02:46 - First Stage Separation
T+0:02:54 - Second Engine Ignition
T+0:03:12 - Fairing Deploy

Atlas V 421
T-0:00:02 - Main Engine Ignition
T-0:00:00 - Solid Rocket Boosters Ignition
T-0:00:00 - Lift Off
T+0:01:14 - Solid Rocket Boosters 1,2 Jettison
T+0:02:42 - Main Engine Cut Off
T+0:02:46 - First Stage Separation
T+0:02:54 - Second Engine Ignition
T+0:03:12 - Fairing Deploy

Atlas V 431
T-0:00:02 - Main Engine Ignition
T-0:00:00 - Solid Rocket Boosters Ignition
T-0:00:00 - Lift Off
T+0:01:14 - Solid Rocket Boosters 1,2 Jettison
T+0:01:15 - Solid Rocket Booster 3 Jettison
T+0:02:42 - Main Engine Cut Off
T+0:02:46 - First Stage Separation
T+0:02:54 - Second Engine Ignition
T+0:03:12 - Fairing Deploy

Atlas V 501
T-0:00:02 - Main Engine Ignition
T-0:00:00 - Lift Off
T+0:02:26 - Fairing Deploy
T+0:02:42 - Main Engine Cut Off
T+0:02:46 - First Stage Separation
T+0:02:07 - Second Engine Ignition

Atlas V 511
T-0:00:02 - Main Engine Ignition
T-0:00:00 - Solid Rocket Booster Ignition
T-0:00:00 - Lift Off
T+0:01:14 - Solid Rocket Booster 1 Jettison
T+0:02:26 - Fairing Deploy
T+0:02:42 - Main Engine Cut Off
T+0:02:46 - First Stage Separation
T+0:02:54 - Second Engine Ignition

Atlas V 521
T-0:00:02 - Main Engine Ignition
T-0:00:00 - Solid Rocket Boosters Ignition
T-0:00:00 - Lift Off
T+0:01:14 - Solid Rocket Boosters 1,2 Jettison
T+0:02:26 - Fairing Deploy
T+0:02:42 - Main Engine Cut Off
T+0:02:46 - First Stage Separation
T+0:02:54 - Second Engine Ignition

Atlas V 531
T-0:00:02 - Main Engine Ignition
T-0:00:00 - Solid Rocket Boosters Ignition
T-0:00:00 - Lift Off
T+0:01:14 - Solid Rocket Boosters 1,2 Jettison
T+0:01:15 - Solid Rocket Booster 3 Jettison
T+0:02:26 - Fairing Deploy
T+0:02:42 - Main Engine Cut Off
T+0:02:46 - First Stage Separation
T+0:02:54 - Second Engine Ignition

Atlas V 541
T-0:00:02 - Main Engine Ignition
T-0:00:00 - Solid Rocket Boosters Ignition
T-0:00:00 - Lift Off
T+0:01:14 - Solid Rocket Boosters 1,2 Jettison
T+0:01:15 - Solid Rocket Boosters 3,4 Jettison
T+0:02:26 - Fairing Deploy
T+0:02:42 - Main Engine Cut Off
T+0:02:46 - First Stage Separation
T+0:02:54 - Second Engine Ignition

Atlas V 551
T-0:00:02 - Main Engine Ignition
T-0:00:00 - Solid Rocket Boosters Ignition
T-0:00:00 - Lift Off
T+0:01:14 - Solid Rocket Boosters 1,2 Jettison
T+0:01:15 - Solid Rocket Boosters 3,4,5 Jettison
T+0:02:26 - Fairing Deploy
T+0:02:42 - Main Engine Cut Off
T+0:02:46 - First Stage Separation
T+0:02:54 - Second Engine Ignition

Atlas V N22 w/ CST-100 Starliner
T-0:00:02 - Main Engine Ignition
T-0:00:00 - Solid Rocket Boosters Ignition
T-0:00:00 - Lift Off
T+0:01:14 - Solid Rocket Boosters 1,2 Jettison
T+0:02:42 - Main Engine Cut Off
T+0:02:46 - First Stage Separation
T+0:02:54 - Second Engine Ignition
T+0:03:02 - Fairing Jettison
T+0:03:08 - Cover Deploy

Calculated with full thrust.