Does UA4639 have Starlink Wi-Fi?

About 99% Starlink odds, weighted to recent UA4639 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.

How the check works · Is Starlink Wi-Fi free?

Next UA4639 departures

  • BOI → SFO · Tue, Oct 20, 8:15 AM MDT
    N134SY · E175
    Starlink
  • BOI → SFO · Wed, Oct 21, 8:15 AM MDT
    N153SY · E175
    Starlink

UA4639 Starlink history

Based on 97 recent flights; Starlink found in 24 of 26 Wi-Fi checks since Jan 12, 2026 (last N614UX, Oct 3, 2026).

Aircraft seen on UA4639: Embraer E-175, Bombardier CRJ-550.

Routes UA4639 flies

  • BOI → SFO · 2h 3m
    Seen 752 times · last seen Oct 19, 2026
    Plan this route
  • COU → ORD · 1h 41m
    Seen 253 times · last seen Jun 24, 2026
    Plan this route
  • ATW → ORD · 1h 31m
    Seen 46 times · last seen Jul 28, 2026
    Plan this route

Other BOI → SFO flights

UA4661UA4733UA4678UA5194UA5192UA5200UA5199

Other ways to check

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  • See every United Airlines aircraft on the fleet page.

Questions

How do I check if UA4639 has Starlink?
Pick your travel date above. United Airlines assigns the aircraft about 2 days before departure, and the answer then comes from that aircraft. Before that, you get Starlink odds from recent UA4639 flights, weighted to the latest.
How accurate is this?
We check each aircraft's Wi-Fi on united.com and match aircraft to flights using flight schedule data. Aircraft can be swapped before departure, so check again the day before you fly.