Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL3940

Live map

Live map filtered to UAL3940. Shown when the flight is currently airborne.

Route airports View route page →

Departure

IAD KIAD VFR

Washington Dulles International Airport

Dulles, US

Local time
01:27 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
312 ft
Coordinates
38.9445, -77.4558

cloud Weather

Wind
210° / 5 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
21°C / 18°C
Altimeter
30.18 inHg

Obs: 2026-07-14T04:52:00.000Z

Raw METAR / TAF 
METAR KIAD 140452Z 21005KT 10SM CLR 21/18 A3018 RMK AO2 SLP218 T02110183 403000167 $

TAF KIAD 140520Z 1406/1512 21005KT P6SM SKC FM141600 22006KT P6SM FEW050

flight Live Traffic

flight_takeoff 213 Departures
flight_land 134 Arrivals

Arrival

ATL KATL IFR

Hartsfield Jackson Atlanta International Airport

Atlanta, US

Local time
01:27 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
1,026 ft
Coordinates
33.6367, -84.4281

cloud Weather

Wind
120° / 7 kt
Visibility
10 SM
Ceiling
BKN 900 ft, BKN 2,500 ft, BKN 5,000 ft, BKN 20,000 ft
Temp / Dew
23°C / 21°C
Altimeter
30.10 inHg

Obs: 2026-07-14T05:13:00.000Z

Raw METAR / TAF 
SPECI KATL 140513Z 12007KT 10SM BKN009 BKN025 BKN050 BKN200 23/21 A3010 RMK AO2 CIG 008V012 BKN009 V SCT T02330211 $

TAF KATL 140326Z 1403/1506 11006KT P6SM -SHRA FEW008 SCT020 BKN120 FM140500 09006KT P6SM VCSH BKN007 BKN012 FM140900 09008KT 6SM BR FEW004 BKN006 FM141600 10008KT P6SM BKN015 BKN035 PROB30 1417/1422 2SM TSRA BKN020CB

flight Live Traffic

flight_takeoff 446 Departures
flight_land 435 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-11 A609D4 IAD → ATL Jul 11, 12:40 UTCJul 11, 13:55 UTC1h 15m - -
2026-07-07 A8F00E - Jul 7, 17:40 UTCJul 8, 00:40 UTC7h 0m - -
2026-07-07 A8F00E LHR → EWR Jul 7, 17:40 UTCJul 8, 00:40 UTC7h 0m +400m +5m
2026-07-04 A7F4E7 - Jul 4, 18:20 UTCJul 4, 21:00 UTC2h 40m - -
2026-07-04 A7F4E7 LHR → SFO Jul 4, 18:25 UTCJul 5, 04:55 UTC10h 30m +25m +9m
2026-07-04 A7F4E7 LHR → SFO Jul 4, 18:25 UTCJul 5, 04:50 UTC10h 25m +25m +4m
2026-07-03 A31A7B ORD → GIG Jul 3, 11:33 UTCJul 3, 20:52 UTC9h 19m +573m -33m
2026-07-03 A31A7B - Jul 3, 11:10 UTCJul 3, 20:50 UTC9h 40m - -
2026-07-01 A31A7B ORD → GIG Jul 1, 05:29 UTCJul 1, 07:20 UTC1h 51m +179m +13m
2026-07-01 A31A7B - Jul 1, 05:10 UTCJul 1, 07:20 UTC2h 10m - -
2026-06-27 AB8CC1 DCA → ORD Jun 27, 15:05 UTCJun 27, 16:55 UTC1h 50m - -
2026-06-27 AB8CC1 DCA → ORD Jun 27, 15:15 UTCJun 27, 16:40 UTC1h 25m +15m +21m
2026-06-25 AA4440 - Jun 25, 00:35 UTCJun 25, 09:40 UTC9h 5m - -
2026-06-24 AA4440 GRU → EWR Jun 24, 23:22 UTCJun 25, 09:40 UTC10h 18m +22m +2m
2026-06-21 A6ED7F DEN → SEA Jun 21, 11:55 UTCJun 21, 13:54 UTC2h 0m - -
2026-06-21 A6ED7F DEN → SEA Jun 21, 11:46 UTCJun 21, 13:51 UTC2h 5m +16m +6m
2026-06-19 AC033E DEN → SEA Jun 19, 12:25 UTCJun 19, 13:14 UTC50m - -
2026-06-16 AA4C1A DEN → SEA Jun 16, 18:52 UTCJun 16, 19:34 UTC42m +112m +11m
2026-06-16 AA4C1A DEN → SEA Jun 16, 18:50 UTCJun 16, 19:15 UTC25m - -
2026-06-15 A126EC DEN → SEA Jun 15, 06:30 UTCJun 15, 06:49 UTC20m - -
2026-06-15 A126EC DEN → SEA Jun 15, 06:03 UTCJun 15, 13:45 UTC7h 42m +288m -8m
2026-06-12 AB9B9D DEN → SEA Jun 12, 10:30 UTCJun 12, 12:10 UTC1h 40m - -
2026-06-12 AB9B9D DEN → SEA Jun 12, 10:27 UTCJun 12, 12:10 UTC1h 43m +27m -3m
2026-06-10 A5F581 DEN → SEA Jun 10, 04:49 UTCJun 10, 06:45 UTC1h 56m +19m -23m
2026-06-10 A5F581 DEN → SEA Jun 10, 04:50 UTCJun 10, 06:45 UTC1h 55m - -
2026-06-06 A254D8 DEN → SEA Jun 6, 11:25 UTCJun 6, 13:25 UTC2h 0m - -
2026-06-04 A22539 DEN → SEA Jun 4, 02:30 UTCJun 4, 04:45 UTC2h 15m - -
2026-05-28 A913D6 DEN → SEA May 28, 12:40 UTCMay 28, 14:19 UTC1h 39m +100m +11m
2026-05-28 A913D6 DEN → SEA May 28, 12:40 UTCMay 28, 14:35 UTC1h 55m - -
2026-05-21 A87223 DEN → SEA May 21, 16:29 UTCMay 21, 19:39 UTC3h 10m +929m -20m

Performance history

Flights tracked
44 showing last 30
Avg arrival delay
on time
On-time arrival
93% 93% on time
Aircraft used
16

Monthly activity 4 months

Month Flights tracked
July 2026 10
June 2026 17
May 2026 12
April 2026 5

UAL3940 frequently asked

Where does flight UAL3940 fly?
UAL3940 flies from IAD to ATL. View the full route page.
How long is flight UAL3940?
Based on observed flights, UAL3940 takes on average 3h 53m from takeoff to landing.
How often does UAL3940 fly?
UAL3940 has been observed flying several times a week in our tracking data. We've recorded 44 flights under this callsign.
Is flight UAL3940 usually on time?
Across recent flights, UAL3940 arrives 0 minutes early on average. 93% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL3940?
UAL3940 has been operated by 16 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL3940 live?
Yes. When UAL3940 is currently airborne, the live tracker map above shows its real-time position from ADS-B broadcasts. If the map is empty, the flight is not currently in the air.