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UAL423

ATH → ORD · Boeing 787-10 · United Airlines

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Departure · Athens (ATH)

Terminal 4 · Gate A03
Scheduled 12:55 · Departed 14:12 · +77 min
Board status: Departed
Airborne since 14:12 (ADS-B)

Arrival · Chicago (ORD)

Gate INTL
Scheduled 16:20 · Estimated 16:47 · +27 min
Board status: Active
In the air, ~5h 8m to go (50% of the route flown)

Board data from ath, ord, updated 48 min ago; times local to each airport.

Flight

Status
In progress
Departure
Eleftherios Venizelos International Airport (ATH) — Athens, Greece
Scheduled departure
2026-10-02 09:55 UTC
Departed
2026-10-02 11:12 UTC
Arrival
Chicago O'Hare International Airport (ORD) — Chicago, United States (scheduled)
Scheduled arrival
2026-10-02 21:20 UTC
Estimated arrival
2026-10-02 21:47 UTC
Progress
50% · ~5h 8m remaining
Also flies as
UA423
Codeshares
AC4568, LH8842
Distance flown
4541 km
Straight-line distance
8770 km

Aircraft

Registration
N17015
Type
Boeing 787-10
Seats
318 total (199 Economy, 54 Economy Plus, 21 Premium Plus, 44 Polaris)

Altitude & speed

Max altitude
36,025 ft
Max ground speed
516 kt
Tracked
5h 1m · 4,541 km
Note
still in progress - the track so far
Altitude (ft, max 36,025)
019,45438,9070m1h 0m2h 0m3h 0m4h 0m5h 0m
Ground speed (kt, max 516)
02795570m1h 0m2h 0m3h 0m4h 0m5h 0m
Altitude (ft, max 36,025)
019,45438,9070m2h 0m4h 0m
Ground speed (kt, max 516)
02795570m2h 0m4h 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

Airlines

Alpine Air Express (AIP)
United Airlines (UAL)

Latest flights

DepartedFlightRouteRegAircraftStatusDistance
2026-10-02 11:12 UTC UAL423 ATH → ORD
Athens → Chicago
 N17015 Boeing 787-10 In progress ~8770 km est.
2026-10-01 10:16 UTC UAL423 ATH → ORD
Athens → Chicago
 N91007 Boeing 787-10 Completed (landing confirmed by airport data) 9273 km
2026-09-30 10:15 UTC UAL423 ATH → ORD
Athens → Chicago
 N14019 Boeing 787-10 Completed (landing confirmed by airport data) 9110 km
2026-09-29 10:00 UTC UAL423 ATH → ORD
Athens → Chicago
 N13013 Boeing 787-10 Completed 9112 km
2026-09-28 10:14 UTC UAL423 ATH → ORD
Athens → Chicago
 N12020 Boeing 787-10 Completed 9020 km
2026-09-27 08:29 UTC UAL423 ATH → ORD
Athens → Chicago
 N16008 Boeing 787-10 Completed 8963 km
2026-09-26 20:00 UTC UAL423 ATH → ORD
Athens → Chicago
 N14016 Boeing 787-10 Completed 1167 km
2026-09-26 10:51 UTC UAL423 ATH → ORD
Athens → Chicago
 N14016 Boeing 787-10 Completed (landing confirmed by airport data) ~8989 km est. (4500 km recorded)
2026-09-25 19:37 UTC UAL423 ATH → ORD
Athens → Chicago
 N16008 Boeing 787-10 Completed 1181 km
2026-09-25 10:08 UTC UAL423 ATH → ORD
Athens → Chicago
 N16008 Boeing 787-10 Completed (landing confirmed by airport data) ~9118 km est. (4625 km recorded)
2026-09-24 09:45 UTC UAL423 ATH → ORD
Athens → Chicago
 N17015 Boeing 787-10 Completed 9186 km
2026-09-23 09:51 UTC UAL423 ATH → ORD
Athens → Chicago
 N14016 Boeing 787-10 Completed 9085 km
2026-09-22 19:10 UTC UAL423 ATH → ORD
Athens → Chicago
 N12004 Boeing 787-10 Completed 1166 km
2026-09-22 09:52 UTC UAL423 ATH → ORD
Athens → Chicago
 N12004 Boeing 787-10 Completed (landing confirmed by airport data) ~9270 km est. (3889 km recorded)
2026-09-20 10:01 UTC UAL423 ATH → ORD
Athens → Chicago
 N14016 Boeing 787-10 Completed 9265 km
2026-09-19 19:32 UTC UAL423 ATH → ORD
Athens → Chicago
 N16009 Boeing 787-10 Completed 892 km
2026-09-19 09:49 UTC UAL423 ATH → ORD
Athens → Chicago
 N16009 Boeing 787-10 Completed (landing confirmed by airport data) ~9347 km est. (4817 km recorded)
2026-09-18 19:48 UTC UAL423 ATH → ORD
Athens → Chicago
 N17015 Boeing 787-10 Completed 918 km
2026-09-18 10:30 UTC UAL423 ATH → ORD
Athens → Chicago
 N17015 Boeing 787-10 Completed (landing confirmed by airport data) ~9544 km est. (3632 km recorded)
2026-09-17 19:35 UTC UAL423 ? → ORD
? → Chicago
 N13018 Boeing 787-10 Completed 959 km
2026-09-17 11:33 UTC UAL423 ATH → ?
Athens → ?
 N127BA BEECHCRAFT 1900 Incomplete (signal lost) 113 km
2026-09-17 09:59 UTC UAL423 ATH → ORD
Athens → Chicago
 N13018 Boeing 787-10 Completed (landing confirmed by airport data) ~9498 km est. (4629 km recorded)
2026-09-16 12:19 UTC UAL423 ATH → ORD
Athens → Chicago
 N14001 Boeing 787-10 Completed 9829 km
2026-09-15 10:01 UTC UAL423 ATH → ORD
Athens → Chicago
 N12020 Boeing 787-10 Completed 9688 km
2026-09-14 09:48 UTC UAL423 ATH → ORD
Athens → Chicago
 N16008 Boeing 787-10 Completed 9513 km
2026-09-13 09:52 UTC UAL423 ATH → ORD
Athens → Chicago
 N17015 Boeing 787-10 Completed 9516 km
2026-09-12 09:50 UTC UAL423 ATH → ORD
Athens → Chicago
 N12010 Boeing 787-10 Completed 9284 km
2026-09-11 10:27 UTC UAL423 ATH → ORD
Athens → Chicago
 N14011 Boeing 787-10 Completed 10167 km
2026-09-10 10:15 UTC UAL423 ATH → ORD
Athens → Chicago
 N12012 Boeing 787-10 Completed 9534 km
2026-09-09 12:14 UTC UAL423 ATH → ORD
Athens → Chicago
 N17002 Boeing 787-10 Completed 9347 km
2026-09-08 10:04 UTC UAL423 ATH → ORD
Athens → Chicago
 N12006 Boeing 787-10 Incomplete (signal lost) ~9072 km est. (2881 km recorded)
2026-09-07 10:37 UTC UAL423 ATH → ORD
Athens → Chicago
 N12021 Boeing 787-10 Completed 9357 km
2026-09-06 09:46 UTC UAL423 ATH → ORD
Athens → Chicago
 N14019 Boeing 787-10 Completed 9348 km
2026-09-05 09:58 UTC UAL423 ATH → ORD
Athens → Chicago
 N12005 Boeing 787-10 Completed 9405 km
2026-09-04 09:25 UTC UAL423 ATH → ORD
Athens → Chicago
 N14016 Boeing 787-10 Completed 9487 km
2026-09-03 10:09 UTC UAL423 ATH → ORD
Athens → Chicago
 N13014 Boeing 787-10 Completed 9544 km
2026-09-02 09:25 UTC UAL423 ATH → ORD
Athens → Chicago
 N13013 Boeing 787-10 Completed 9414 km
2026-09-01 10:08 UTC UAL423 ATH → ORD
Athens → Chicago
 N12021 Boeing 787-10 Completed 9306 km
2026-08-31 09:39 UTC UAL423 ATH → ORD
Athens → Chicago
 N16009 Boeing 787-10 Completed 10257 km
2026-08-30 09:38 UTC UAL423 ATH → ORD
Athens → Chicago
 N14016 Boeing 787-10 Completed 9171 km
2026-08-29 09:29 UTC UAL423 ATH → ORD
Athens → Chicago
 N12003 Boeing 787-10 Completed 9525 km
2026-08-28 10:18 UTC UAL423 ATH → ORD
Athens → Chicago
 N91007 Boeing 787-10 Completed 9404 km
2026-08-27 09:28 UTC UAL423 ATH → ORD
Athens → Chicago
 N13018 Boeing 787-10 Completed 9505 km
2026-08-26 09:52 UTC UAL423 ATH → ORD
Athens → Chicago
 N12012 Boeing 787-10 Completed 9592 km
2026-08-25 09:58 UTC UAL423 ATH → ORD
Athens → Chicago
 N12004 Boeing 787-10 Completed 9282 km
2026-08-24 09:58 UTC UAL423 ATH → ORD
Athens → Chicago
 N12020 Boeing 787-10 Completed 9524 km
2026-08-23 09:55 UTC UAL423 ATH → ORD
Athens → Chicago
 N14001 Boeing 787-10 Completed 9260 km
2026-08-22 10:12 UTC UAL423 ATH → ORD
Athens → Chicago
 N12012 Boeing 787-10 Completed 10940 km
2026-08-21 10:11 UTC UAL423 ATH → ORD
Athens → Chicago
 N14016 Boeing 787-10 Completed 11035 km
2026-08-20 10:16 UTC UAL423 ATH → ORD
Athens → Chicago
 N16008 Boeing 787-10 Completed 12441 km

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