Delta Air LinesDL
Flights DL4637 varies Mo Tu We Th Fr Su
live
Direct flights from Billings (BIL) to Denver (DEN): 13 nonstop departures observed each week across 2 airlines. 64% of the last 11 operated flights arrived within 15 minutes of schedule. The median arrival is 9 minutes late. No cancellations were recorded across the 11 tracked flights. The nonstop covers 732 km, an estimated 1 hour 26 minutes in the air. Measured by Pro Flight Search from live flight boards at Billings and Denver. Updated 14 September 2026 at 09:01 UTC.
BIL
Billings
busy · +16
DEN
Denver
disrupted · +98
732 km · ~1h 26m est.
Runs mixed · 2 airlines · 13x weekly · nonstop
64% on time
of the last 11 operated BIL → DEN flights arrived within 15 minutes
Median arrival delay is +9 min. 0 of 11 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+9 minacross the last 11 operated legs
Flight time~1h 26mestimated from route distance
Weekly departures13x2 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 11
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Delta Air LinesUnited Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysHistory
operated legs · board outcomes09-13DL4637departed+15
09-13DL4654departed+21
09-12DL4643departed+16
09-12DL4654departed+26
Actual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at BIL and DEN: 42% odds of a 15+ minute delay and around +14 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Billings to Denver route actually runs
Pro Flight Search records official board updates for nonstop BIL to DEN flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Billings (BIL) to Denver (DEN) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/BIL-DEN
BIL to DEN questions
Is BIL–DEN running on time right now?
Significant delay risk. The arrival side at DEN is the weaker end, route health score 39/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on BIL–DEN?
Operators schedule morning departures around 07:00 and evening departures around 17:57 from BIL. Earlier flights typically land before destination-airport delays accumulate later in the day; check the DEN delay card to confirm conditions when you'd arrive.
How long is the flight from BIL to DEN?
Great-circle distance is 732 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 82–93 min gate-to-gate on this route.
How often does BIL–DEN fly?
2 carriers operate this route, around 53 flights a week between them. Compare carrier days and times in the airline list above.
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