The Embraer ERJ-145 is a jet powered regional airliner and is the base variant of the ERJ family of aircraft. The ERJ-145 is no longer in production and is used in limited service across the world. It typically flies short to medium range routes with low to medium demand.
- The ERJ-145EP is a modified version of the ERJ-145ER that has extra range and a higher Maximum Takeoff Weight (MTOW). The increase in MTOW allows for the additional weight to be added to the plane. Since there is no additional seating capacity, the increase would come in the form of more fuel to travel farther or more cargo or a combination of the two.
- The ERJ-145LR is a modified version of the ERJ-145 that has longer range.
- The ERJ-145LU is a modified version of the ERJ-145 that has extra range and a higher Maximum Takeoff Weight (MTOW). The increase in MTOW allows for the additional weight to be added to the plane. Since there is no additional seating capacity, the increase would come in the form of more fuel to travel farther or more cargo or a combination of the two.
- The ERJ-145XR is a modified version of the ERJ-145 that has extra range. This variant has a significant increase in operating range due to new engines, increased range and the addition of winglets. This sub-variant is the latest design of the Embraer 135/140/145 family.

