Should I buy a 13-inch or 15-inch MacBook Air?
They are the same computer. The 15-inch is about 3.3 pounds versus 2.7, and it usually asks $150 to $200 more. Pick the 15-inch if it lives on a desk. Pick the 13-inch if you carry it daily.
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$400$600$800$1,000$1,200
Side by side
Shaded with a red rule: the better side for a typical buyer. Not a lab score.
Air 13-inch M4Air 15-inch M4
Typical price
Better here: About $900
About $1,080
Memory
16GB is standard. It can be ordered with 24GB or 32GB. It cannot be upgraded later.
16GB is standard, same as the 13-inch M4.
Storage
256GB is the base. 512GB is more comfortable if you store photos or projects locally.
256GB is the base.
Screen
13.6-inch Liquid Retina, about 500 nits.
Better here: 15.3-inch Liquid Retina, about 500 nits.
Ports
MagSafe, two Thunderbolt ports, and a headphone jack. No HDMI and no SD card slot.
MagSafe, two Thunderbolt ports, and a headphone jack. No HDMI.
External displays
Two external displays, with the lid open.
Two external displays, with the lid open.
Camera
12MP Center Stage. It keeps you in frame on calls.
12MP Center Stage.
Noise
Silent. There is no fan.
Silent. There is no fan.
Weight
Better here: 2.7 lb
3.3 lb
Battery
Apple’s figure is up to 18 hours of video.
Apple’s figure is up to 18 hours of video.
Speed
The sweet spot. Comfortable for school, photo work, and most coding.
The same M4 as the 13-inch. You are paying for the screen.
US eBay asking ranges as of November 11, 2026.