You will have to use an adapter/cable but easy enough.  Search for HDMI to VGA and Display Port to VGA adapters.  Amazon has a lot of choices.  For example, I use this one on an old VGA Samsung monitor with my Dell... DP to VGA Cable 

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@dira24 wrote:

1. I just got the Dell XPS 8930. It has 1 HDMI port, 1 DisplayPort and a couple of USB ports.

2. I have two Dell E2414H screens which I want to connect - they only have VGA ports in the back.

 

 

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1. Well, the proper way to do this is with a dedicated video card.

2. According to the Internet, they also have (digital) DVI ports. I suggest you use them (or try to convert to them).

@dira24 According to the Setup Guide (https://downloads.dell.com/manuals/all-products/esuprt_electronics/esuprt_display_projector/esuprt_display/dell-e2414h_setup%20guide_en-us.pdf) , @Tesla1856 is correct, the Dell E2414H has both DVI and VGA video inputs. I also suggest you use DVI and not VGA.

What would be the difference if I'm either way converting them both to HDMI?

I do not have a dedicated video card as of now so that's not an option.

Is there a difference if I'm connecting/converting to HDMI if it's through a VGA or DVI?

Understood.

Is there a HDMI or DP cable I can connect to the PC which would give me an extra port?

No way to add an additional port without an adding a discrete video card.  However, the DP port allows you to daisy chain monitors from the same port so once you decide to buy new monitors that supports DP chaining, you will be able to daisy chain 2-3 monitors from the one DP port on the 8930 depending on the resolution desired.

If the intention is to add a 3rd monitor, there's always a USB3>{video} dongle, where {video} is a port supported by that 3rd monitor.

Just make sure the dongle supports Win 10 and the "native" (= "recommended" or "optimum") resolution of the monitor connected to the dongle. 

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@Bill Settle wrote:

@dira24,

1. VGA is analog where as DVI is digital so DVI will give you "better" quality signal depending on components. 

2. However, the monitors you have are only 1920x1280 @ 60Hz so I doubt you would ever be able to tell a difference between the DVI or VGA inputs on your monitors if you are using short, 3-6' cables. 

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1. Correct

2. Dell E2414H - 24" LED monitor - Full HD (1080p) - 24" Specs
    Native Resolution. Full HD (1080p) 1920 x 1080 at 60 Hz

With 1080p 24inch monitor, sitting 2-feet away ... you should be able to tell a difference between VGA and DVI. It will be sharper and the colors are better.

That is why I bothered to post in the first place.