How do I check if UA421 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 UA421 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 UA421 have Starlink Wi-Fi?

About 78% Starlink odds, weighted to recent UA421 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 UA421 departures

DEN → IAD · Mon, Oct 19, 3:45 PM MDT
N14569 · A321neo
Starlink
IAD → ORD · Mon, Oct 19, 10:18 PM EDT
N24516 · A321neo
Starlink
IAD → ORD · Tue, Oct 20, 10:18 PM EDT
N14509 · A321neo
Starlink

UA421 Starlink history

Based on 160 recent flights; Starlink found in 13 of 30 Wi-Fi checks since Jan 2, 2026 (last N14545, Oct 17, 2026).

Aircraft seen on UA421: Airbus A321neo, Boeing 757-300, Boeing 737-800, Boeing 737-900ER.

Routes UA421 flies

DEN → IAD · 3h 26m
Seen 892 times · last seen Oct 19, 2026
Plan this route
IAD → ORD · 2h 14m
Seen 351 times · last seen Oct 19, 2026
Plan this route
SJC → DEN · 2h 37m
Seen 33 times · last seen Oct 18, 2026
Plan this route

Other DEN → IAD flights

UA1924 UA2408 UA2853 UA1101 UA1279 UA347 UA2087 UA1610

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 UA421 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 UA421 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.