Airport Wi-Fi guide
Seattle, United States

Sea-Tac Wi-FiIs it free, how long it lasts and how to connect

Seattle–Tacoma International Airport offers free Wi-Fi in all its public areas. The network is called SEA-FREE-WIFI.

Checked 6 November 2026 · from Port of Seattle’s own pages

Network SEA-FREE-WIFI Free Wi-Fi Free Time limit Not published How you sign in Accept terms, sometimes an ad Paid option None published Based here Alaska Airlines, Delta Air Lines

Step by step

How to connect to Sea-Tac Wi-Fi

  1. Join the network SEA-FREE-WIFI.

  2. Accept the terms and conditions on the page that opens.

  3. Occasionally you will see a brief ad before the internet opens.

Free

What’s free at Sea-Tac

  • Wi-Fi is free of charge in all public areas of the airport.
  • The Port of Seattle doesn’t publish a time limit, a data cap or a speed.

As of November 2026.

Paid

Faster or longer Wi-Fi

The Port of Seattle doesn’t publish a paid or faster tier.

In the lounges

The Port lists free Wi-Fi among the amenities of The Club at SEA, near Gate A12 and above Gate S10.

As of November 2026.

Tips

When Sea-Tac Wi-Fi won’t play along

From Sea-Tac

  • The airport’s ASL interpreter service and the Aira service for blind and low-vision travellers both run over SEA-FREE-WIFI.

On a Mac

  • No sign-in page? Open http://captive.apple.com in Safari. A plain http page can be redirected to the airport’s sign-in page; an https one can’t.
  • Pause what hides it. A VPN, iCloud Private Relay or your own DNS can keep the page from opening. Turn them off, sign in, then turn them back on.
  • Forget and rejoin. A network the Mac already knows may not show the sign-in window again. Forget it in System Settings › Wi-Fi and join once more.
  • Look behind your windows. macOS opens the sign-in page in a small window of its own, which can open behind the others.

More in Wi-Fi login page not appearing on a Mac and hotel and airport Wi-Fi login on a Mac.

Airlines

Airlines based at Sea-Tac

Boarding soon? Here’s what the Wi-Fi is like once you’re on the plane.

Alaska AirlinesAlaska Airlines in-flight Wi-Fi →Delta Air LinesDelta Air Lines in-flight Wi-Fi →

At the gate with Kilobat

Airport Wi-Fi on a Mac, without the guesswork

Kilobat is a Mac menu-bar app that shows what each app sends and holds back what can wait. At Sea-Tac:

  • It spots the sign-in page Free

    When the page doesn’t open by itself, the menu bar says This Wi-Fi wants you to sign in, with Open sign-in page. When a sign-in runs out, it says Logged out by the Wi-Fi’s sign-in page instead of blaming DNS.

  • It warns you before time runs out Pro

    Kilobat learns how long sign-ins last on each network, and warns you about five minutes before the next logout. While you’re signed in, the menu shows the time left.

  • It holds back what can wait Pro

    Airport Wi-Fi is shared by a terminal full of people. Switch to the Travel profile and only the apps you allowed connect. Mark the network Metered and Kilobat switches to Travel by itself.

  • It checks the line before a call Free

    The stutter test pings the internet every 50 ms for 20 seconds and shows the spikes an average hides. Check before meetings warns you five minutes before a call if something would freeze it; with Pro, one button pauses the culprits.

Download for Mac ↓
brew install seifip/kilobat/kilobat

Pro is $29 once for two Macs, with a 7-day free trial and 14-day refunds. How the sign-in checks work: hotel and airport Wi-Fi login on a Mac.

Kilobat

SEA-FREE-WIFI will log you out in 5 min

Open sign-in page

Questions

Is the Wi-Fi at Sea-Tac free?

Yes. The Port of Seattle says Wi-Fi is free of charge in all public areas of the airport.

What is the Wi-Fi network called at Sea-Tac?

The network is SEA-FREE-WIFI. You accept the terms, and sometimes watch a brief ad, before you get online.

Is there a time limit on Sea-Tac Wi-Fi?

The Port of Seattle doesn’t publish a time limit or a data cap.

Why won’t the Sea-Tac Wi-Fi sign-in page open on my Mac?

A VPN, iCloud Private Relay or your own DNS can keep it from opening. Turn them off, open http://captive.apple.com in Safari, and turn them on again once you’re signed in. Kilobat shows Open sign-in page when a network is waiting for you.

Sources

Checked on 6 November 2026.

Get your Mac ready for Sea-Tac.

Download for Mac ↓
brew install seifip/kilobat/kilobat