Tracked flight number

DL637

DAL637Delta Air LinesPhoto aircraft N811DZAug 20 – Sep 24, 2026

Data through Sep 24, 2026 UTC

Analysis window

Aug 20 – Sep 24, 2026

Every derived statistic, daily trend, route, tail number assignment, flight observation, and mapped path below uses this flight-date window.

Global rankings

Among tracked flight numbers · Aug 20 – Sep 24, 2026

Explore flight numbers

Tracked flights

#9,289of 163,734 · tied

Tracked distance

#8,218of 163,734

61,166 mi

Observed time

#8,957of 163,734

117 hr

Route breadth

#13,941of 163,734 · tied

Active aircraft

#6,323of 163,734 · tied

Active days

#7,958of 163,734 · tied

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Tracked flights35

34 active days

Tracked distance61,166 mi

1,748 mi avg per flight

Observed time117 hr 1 min

3 hr 21 min average

Tracking Confidence100.0%

Average across flights included in analytics

Named routes2

2 aircraft types

Average mid-flight altitude11,080 m

Average mid-flight speed925 km/h

Tracked activity

Aug 20 – Sep 24, 2026 · 34 active days

Flights35

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Observed route footprint

Routes tracked as DL637

Directional airport pairings in Aug 20 – Sep 24, 2026.

2 routes shown

Route	Flights	Active days	Tail numbers	Tracked distance	Observed	First observed	Last observed
SEA → ORD	34	34	0	60,761 mi	116 hr 4 min	Aug 20, 2026, 6:15 PM UTC	Sep 23, 2026, 10:09 PM UTC
MSP → ORD	1	1	0	405 mi	57 min	Sep 1, 2026, 1:21 AM UTC	Sep 1, 2026, 2:18 AM UTC

Observed tail number assignments

Tail numbers tracked as DL637

Open a tail number for its complete tracked profile.

29 tail numbers shown

Tail number	Type	Flights	Routes	Tracked distance	First observed	Last observed
N928DU	B739	2	1	3,526 mi	Aug 23, 2026, 6:05 PM UTC	Sep 22, 2026, 10:39 PM UTC
N959DZ	B739	2	1	3,510 mi	Sep 13, 2026, 7:36 PM UTC	Sep 21, 2026, 10:35 PM UTC
N919DU	B739	2	1	3,667 mi	Aug 30, 2026, 6:32 PM UTC	Sep 17, 2026, 11:11 PM UTC
N871DN	B739	2	1	3,500 mi	Aug 29, 2026, 6:02 PM UTC	Sep 11, 2026, 10:13 PM UTC
N816DN	B739	2	1	3,556 mi	Aug 24, 2026, 6:55 PM UTC	Sep 8, 2026, 10:14 PM UTC
N889DN

Observed aircraft types

Aircraft types tracked as DL637

Observed flights grouped by aircraft designator and matched to the aircraft reference catalog.

2 aircraft types shown

Type	Aircraft name	Flights	Makeup	Tail numbers	Tracked distance	Routes	First observed	Last observed
B739	Boeing 737-900	34	97.1%	28	59,414 mi	2	Aug 20, 2026, 6:15 PM UTC	Sep 23, 2026, 10:09 PM UTC
B738	Boeing 737-800	1	2.9%	1	1,753 mi	1	Sep 7, 2026, 7:20 PM UTC	Sep 7, 2026, 10:37 PM UTC

Observation log

Flight observations

Latest 100 flights for DL637 within Aug 20 – Sep 24, 2026

36 observations shown

Confidence	Route	Tail number	Aircraft	First observed	Last observed	Observed	Tracked distance
High · 100	SEA → ORD	N893DN	B739	Sep 23, 2026, 6:56 PM UTC	Sep 23, 2026, 10:09 PM UTC	3 hr 13 min	1,739 mi
High · 100	SEA → ORD	N928DU	B739	Sep 22, 2026, 7:04 PM UTC	Sep 22, 2026, 10:39 PM UTC	3 hr 35 min	1,748 mi
High · 100	SEA → ORD