Satellite internet sends data through space instead of underground cables

Satellite internet works by bouncing your data up to a satellite orbiting Earth, then back down to a ground station, and finally to you. Instead of relying on fiber optic cables buried under streets or telephone poles carrying signals, a satellite system uses radio waves traveling through the air and space. Your modem sends a signal up to the satellite, the satellite receives it and sends it back down, and a receiver dish on your roof or outside your home picks up that signal and passes it to your equipment.

The main reason satellite internet exists is geography. If you live somewhere cables cannot reach—rural areas, mountains, islands, or places where building infrastructure is too expensive—satellite can still get you online. The trade-off is that the signal has to travel much farther than it does through a cable, which creates delays and affects how the internet feels when you use it.

Key Takeaways

  • Satellite internet sends your data up to a satellite in orbit, which bounces it back down to a ground station, adding a delay called latency that makes video calls and online games feel slower than cable internet.
  • Two types of satellites serve internet: geostationary satellites that stay over one spot on Earth and low-earth orbit satellites that circle the planet, with different speeds and coverage areas.
  • You need a satellite dish pointed at the sky, a modem, and a clear line of sight to the satellite—trees, buildings, and heavy rain can interrupt your signal.
  • Satellite internet typically costs between $50 and $150 per month depending on speed and data limits, with installation fees ranging from $300 to $600 in most areas.

The journey your data takes: up, around, and back down

When you click a link or send an email on satellite internet, your modem converts that request into a radio signal and sends it upward to the satellite. This is called the uplink. The satellite receives your signal and immediately transmits it back down to Earth to a ground station—a facility with large antennas that connects to the broader internet backbone. This return path is called the downlink. The ground station then routes your request to wherever it needs to go: a website server, an email provider, or a video streaming service.

The response travels the same path in reverse. The website or service sends data back to the ground station, which transmits it up to the satellite, and the satellite beams it down to your dish. Your modem receives it and passes it to your computer, phone, or router. This entire round trip—up to space and back—takes time. That delay is called latency, and it is the main reason satellite internet feels different from cable or fiber. With cable internet, data travels through wires at nearly the speed of light over short distances. With satellite, it travels at the speed of light but covers thousands of miles, adding noticeable lag.

Geostationary satellites versus low-earth orbit satellites

Not all satellites are the same distance from Earth, and that distance changes everything about how the internet works. Geostationary satellites orbit about 22,000 miles above the equator and stay in the same spot over Earth as the planet rotates. This means one satellite can cover a huge area—roughly one-third of the planet—so fewer satellites are needed to provide global coverage. The downside is that the signal has to travel 22,000 miles up and 22,000 miles back down, creating latency of 500 to 700 milliseconds. That delay is noticeable when you are video calling, playing online games, or doing anything that requires quick back-and-forth interaction.

Low-earth orbit (LEO) satellites circle the planet at altitudes between 500 and 1,200 miles, much closer to Earth. Because they are closer, the signal travels a shorter distance and latency drops to 20 to 50 milliseconds—similar to cable internet. The trade-off is that LEO satellites move across the sky constantly, so you need many more of them to maintain coverage. Companies like SpaceX (Starlink) and Amazon (Project Kuiper) are launching thousands of LEO satellites to create global networks. As of now, Starlink is the largest LEO satellite internet service available to consumers in many regions, while traditional geostationary providers like Viasat and HughesNet still serve areas where LEO coverage is not yet available.

What you need to install satellite internet at home

Satellite internet requires three main pieces of equipment. The satellite dish is an antenna that points at the sky toward the satellite. It needs a clear line of sight—no trees, buildings, or other obstructions blocking the signal. The dish is usually mounted on your roof, on a pole in your yard, or on the side of your house. The modem is a box that converts the signal from the dish into data your devices can use, similar to a cable modem. Some systems combine the modem and router into one unit. Finally, you need a router to broadcast that internet wirelessly to your devices or connect them with ethernet cables.

Installation typically involves a technician coming to your home to assess whether you have a clear view of the satellite, mount the dish, run cables into your house, and set up the modem and router. This process usually takes a few hours. Some newer systems, particularly Starlink, are designed for self-installation and come with detailed instructions and video guides, though professional installation is still an option. The dish itself is relatively small—Starlink's dish is about the size of a pizza box—but it must point precisely at the satellite to work.

Speed, data limits, and what affects your connection

Satellite internet speeds vary depending on which provider and plan you choose. Geostationary satellite providers typically offer download speeds between 12 and 100 Mbps, while LEO providers like Starlink advertise speeds between 50 and 200 Mbps in areas with good coverage. Upload speeds are usually much slower than download speeds—often 5 to 20 Mbps—because most satellite systems prioritize downloading data over uploading it. For everyday tasks like browsing, email, and streaming video, these speeds are usually adequate. For uploading large files, video conferencing, or online gaming, the slower upload speeds and latency can be frustrating.

Many satellite plans come with monthly data caps, meaning you can only download a certain amount of data before your speed slows down or you pay extra. Caps range from 50 GB to 500 GB per month depending on the plan, though some newer LEO services offer unlimited data. A few things can degrade your satellite signal: heavy rain absorbs radio waves and can temporarily interrupt service, trees or buildings blocking your dish will weaken the signal, and snow accumulation on the dish can block it entirely. Most people in snowy climates need to clear their dish after storms.

Cost and availability in your area

Satellite internet typically costs between $50 and $150 per month for residential service, depending on speed tier and data limits. Installation fees range from $300 to $600 in most areas, though some providers occasionally offer promotions that reduce or waive this cost. Equipment costs are usually included in the installation fee, though you may own the equipment outright or lease it depending on your provider's terms. If you own the equipment and cancel service, you keep the dish and modem; if you lease, you return them.

Availability depends on your location and which provider serves your area. Starlink is available in many rural and suburban areas across North America and parts of Europe, Asia, and other regions, though coverage continues to expand. Viasat and HughesNet serve different geographic areas, so checking their coverage maps is necessary to see what is available at your address. Some areas have multiple providers to choose from, while others have only one or two options. Your internet service provider or local broadband authority can tell you which services reach your location.

When satellite internet makes sense and when it does not

Satellite internet is the right choice when you have no other option—when cable, fiber, and DSL do not reach your home. It is also worth considering if you need backup internet when your primary connection fails, since satellite uses a completely different infrastructure. Some people in areas with poor cable service choose satellite as their primary connection and accept the latency trade-off for the speed improvement.

Satellite internet is not ideal if you play competitive online games, do professional video conferencing regularly, or upload large files as part of your work. The latency and data caps make these tasks slower and more frustrating than cable or fiber. If you have cable or fiber available in your area, those are almost always better choices for speed, reliability, and cost. Satellite is a solution for a specific problem—reaching people in places cables cannot economically reach—not a replacement for wired internet where it already exists.

Frequently Asked Questions

Why is satellite internet slower than cable if the signal travels at the speed of light?

The signal does travel at light speed, but it has to cover thousands of miles to reach the satellite and come back down. A cable signal travels through wires over a few miles at most. Geostationary satellites add 500 to 700 milliseconds of delay just from the distance. LEO satellites reduce this to 20 to 50 milliseconds, which is much closer to cable speeds. The delay is real physics, not a technical limitation that can be engineered away.

Can I use satellite internet for streaming video and video calls?

Yes, for most purposes. Streaming video and video calls work fine on satellite internet as long as you have adequate download speed—usually 5 to 10 Mbps for HD video. The latency is noticeable in video calls (you will see slight delays in conversation), but it is not usually a dealbreaker. Online gaming and real-time applications are where latency becomes a real problem.

What happens to my satellite internet during a storm?

Heavy rain and thunderstorms can temporarily interrupt your signal because water droplets absorb radio waves. The outage is usually temporary and lasts only while the storm is directly overhead. Snow accumulation on your dish can block the signal entirely until you clear it off. Most people in snowy climates keep a soft brush or cloth nearby to clear the dish after storms.

Do I need a phone line or cable connection to use satellite internet?

No. Satellite internet is completely independent—it only needs a clear view of the sky and a power outlet. You do not need any existing infrastructure. This is why it works in remote areas where no cables exist. You can use satellite internet alone for all your connectivity needs.

Can I move my satellite dish if I relocate?

Yes, but it requires reinstallation. If you move within the same service area, your provider can typically move your equipment for a fee, usually $100 to $300. If you move outside your provider's coverage area, you may need to switch providers entirely. Some newer systems like Starlink are designed to be portable, so you can move the dish yourself if you stay within coverage.