How do I check if UA3999 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 UA3999 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.

Does UA3999 have Starlink Wi-Fi?

Over 99% Starlink odds, weighted to recent UA3999 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 UA3999 departures

ATL → IAH · Fri, Oct 9, 9:30 AM EDT
N87319 · E175
Starlink
ATL → IAH · Sat, Oct 10, 9:30 AM EDT
N89321 · E175
Starlink

UA3999 Starlink history

Based on 76 recent flights; Starlink found in 17 of 17 Wi-Fi checks since Jan 9, 2026 (last N88332, Sep 7, 2026).

Aircraft seen on UA3999: Embraer E-175.

Routes UA3999 flies

ATL → IAH · 2h 27m
Seen 87 times · last seen Oct 8, 2026
Plan this route
BDL → IAD · 1h 33m
Seen 983 times · last seen Sep 24, 2026
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IAD → LGA · 1h 21m
Seen 197 times · last seen Sep 7, 2026
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EYW → IAH · 3h 18m
Seen 286 times · last seen May 20, 2026
Plan this route

Other ATL → IAH flights

UA3992 UA532 UA6130 UA4037 UA3987 UA4661 UA4060 UA1359

Other ways to check

Know your tail number? Search it on the homepage.
Shopping on Google Flights? The free Chrome extension marks United flights that have Starlink.
See every United Airlines aircraft on the fleet page.

Questions

How do I check if UA3999 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 UA3999 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.