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UA521

IAH → BOS · Boeing 737 MAX 9 · United Airlines

For travellers

Departure · Houston (IAH)

Terminal C · Gate C9
Scheduled 01 Oct 18:35 · Departed 01 Oct 19:04 · +29 min
Board status: Departed
Airborne since 01 Oct 19:38 (ADS-B)

Arrival · Boston (BOS)

Terminal B · Gate B23 · Baggage belt 6
Scheduled 01 Oct 23:39 · Landed 01 Oct 23:58 · +19 min
Board status: Arrived
Landed 01 Oct 23:58 (airport data)

Board data from bos, houston, updated 796 min ago; times local to each airport.

Flight

Status
Completed (landing confirmed by airport data)
Arrival confirmed via
Airport data (confirmed)
Departure
George Bush Intercontinental Houston Airport (IAH) — Houston, United States
Scheduled departure
2026-10-01 23:35 UTC
Departed
2026-10-02 00:38 UTC
Arrival
General Edward Lawrence Logan International Airport (BOS) — Boston, United States
Scheduled arrival
2026-10-02 03:39 UTC
Estimated arrival
2026-10-02 03:47 UTC
Distance flown
2769 km
Straight-line distance
2568 km

Aircraft

Registration
N37530
Type
Boeing 737 MAX 9
Seats
179 total (117 Economy, 42 Economy Plus, 20 First)
CO2 (EMEP est., total)
53.5 t (379 kg/pax Business, 289 kg/pax Economy)

Altitude & speed

Max altitude
35,025 ft
Max ground speed
535 kt
Tracked
3h 18m · 2,765 km
Altitude (ft, max 35,025)
018,91437,8270m30m1h 0m1h 30m2h 0m2h 30m3h 0m
Ground speed (kt, max 535)
02895780m30m1h 0m1h 30m2h 0m2h 30m3h 0m
Altitude (ft, max 35,025)
018,91437,8270m1h 0m2h 0m3h 0m
Ground speed (kt, max 535)
02895780m1h 0m2h 0m3h 0m

From the ADS-B positions we received; time since the first fix. A dashed stretch is a gap in reception, bridged by a straight line.

Route map

Airline

United Airlines (UAL)

Latest flights

DepartedFlightRouteRegAircraftStatusDistance
2026-10-02 00:38 UTC UAL521 IAH → BOS
Houston → Boston
 N37530 Boeing 737 MAX 9 Completed (landing confirmed by airport data) 2769 km
2026-09-30 23:54 UTC UAL521 IAH → BOS
Houston → Boston
 N47524 Boeing 737 MAX 9 Completed 2760 km
2026-09-30 21:08 UTC UAL1123 IAH → BOS
Houston → Boston
 N47524 Boeing 737 MAX 9 Completed (landing confirmed by airport data) ~3106 km est. (492 km recorded)
2026-09-30 00:40 UTC UAL521 IAH → BOS
Houston → Boston
 N37562 Boeing 737 MAX 9 Completed 2704 km
2026-09-26 13:46 UTC UAL521 IAH → MCO
Houston → Orlando
 N17289 Boeing 737 MAX 8 Completed 1436 km

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