I’m looking at the online site for my local big chain grocery store. This is what I’m seeing, all for half gallon sizes:

• Store brand regular milk is $2.69 for 2% and $2.79 for whole
• Simple truth almond milk is $2.99
• Store brand lactose free milk is $3.99 for all varieties (on sale from $4.49)
• Simple truth soy milk is $3.49 for all varieties
• Califia farms oat milk is $4.29 for all varieties (on sale from $5.99)

These are all the less expensive alternatives. So almond milk is slightly higher than regular, but the others are a pretty significant percent increase.