How do I check if UA2421 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 UA2421 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 UA2421 have Starlink Wi-Fi?

About 48% Starlink odds, weighted to recent UA2421 flights. A firm answer comes about 2 days before departure, once the aircraft is assigned.

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

UA2421 Starlink history

Based on 60 recent flights; Starlink found in 6 of 10 Wi-Fi checks since Mar 13, 2026 (last N38479, Sep 28, 2026).

Aircraft seen on UA2421: Boeing 737 MAX 9, Boeing 737-900ER, Boeing 737-900.

Routes UA2421 flies

MSY → SFO · 4h 39m
Seen 215 times · last seen Oct 19, 2026
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TPA → IAH · 2h 27m
Seen 73 times · last seen Aug 8, 2026
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SFO → YVR · 2h 28m
Seen 6 times · last seen Sep 22, 2026
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DEN → IND · 2h 34m
Seen 42 times · last seen May 18, 2026
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Other MSY → SFO flights

UA2194 UA1973

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 UA2421 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 UA2421 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.