2 active days
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Tracked directional route
DEN → BFI
Denver International Airport → King County International Airport
DEN
KDENDenver International AirportOpen live airport profile →DestinationBFI
KBFIKing County International AirportOpen live airport profile →Analysis window
Sep 4–24, 2026
Every derived statistic, trend, operator and tail number breakdown, flight observation, and mapped path below uses this flight-date window.
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991 mi avg per flight
1 hr 60 min average
Average across flights included in analytics
2 flight numbers
Tracked activity
Sep 4–24, 2026 · 2 active days
Flights2
Sep 4
Sep 20
Observed operators
Operators tracked on DEN → BFI
Operator activity within Sep 4–24, 2026.
| Operator | Flights | Flight numbers | Tail numbers | Tracked distance | First observed | Last observed |
|---|---|---|---|---|---|---|
| 1 | 1 | 1 | 1,007 mi | Sep 20, 2026, 6:37 AM UTC | Sep 20, 2026, 8:41 AM UTC | |
UPS (5X)UPS | 1 | 1 | 1 | 975 mi | Sep 4, 2026, 9:15 AM UTC | Sep 4, 2026, 11:10 AM UTC |
Observed services
Flight numbers tracked on DEN → BFI
Open a flight number for its complete tracked profile.
Observed tail numbers
Tail numbers tracked on DEN → BFI
Open a tail number for its complete tracked profile.
Observed aircraft types
Aircraft types tracked on DEN → BFI
Observed flights grouped by aircraft designator and matched to the aircraft reference catalog.
Observation log
Flight observations
Latest 100 flights on DEN → BFI within Sep 4–24, 2026