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955 km · Domestic

Denver (DEN) – Helena (HLN)

In July 2026, 122 flights operated between Denver and Helena (both directions), and 76.2% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January121124▲ 2.5%
February1111110.0%
March124122▼ 1.6%
April119120▲ 0.8%
May141124▼ 12.1%
June176120▼ 31.8%
July176122▼ 30.7%
August182––
September180––
October174–in progress
November116––
December124––
Year to date (Jan–Jul)968843▼ 12.9%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January69.4%91.9%▲ 32.4%
February60.4%87.4%▲ 44.7%
March87.9%82.0%▼ 6.7%
April74.8%95.8%▲ 28.1%
May74.5%95.2%▲ 27.8%
June56.8%80.8%▲ 42.3%
July64.8%76.2%▲ 17.6%
August64.3%––
September81.7%––
October83.9%–in progress
November89.7%––
December76.6%––
Year-to-date average (Jan–Jul)69.8%87.0%▲ 24.7%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January30▼ 100.0%
February110.0%
March02–
April10▼ 100.0%
May30▼ 100.0%
June40▼ 100.0%
July60▼ 100.0%
August4––
September0––
October0–in progress
November2––
December0––
Year to date (Jan–Jul)183▼ 83.3%

By direction

DEN → HLN

Scheduled flights
1,468
Flights operated
1,450
Cancelled
18 · 1.2%
On-time departures
76.6%

HLN → DEN

Scheduled flights
1,468
Flights operated
1,455
Cancelled
13 · 0.9%
On-time departures
80.4%

DEN → HLN and HLN → DEN counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
SkyWest Airlines OO 2,936 100.0% 78.5% 31

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay06:00–07:009.5min · 658 recorded · 653 measured
Gap to highest-delay hour13.6min06:00 ↔ 19:00
Recorded flights2,936DEN–HLN

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 90.7% · 658 recorded · 653 measured · Source: the US BTS 07:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 09:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · 80.0% · 593 recorded · 590 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 65 recorded · 65 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · 76.1% · 810 recorded · 804 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 155 recorded · 152 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · 73.1% · 647 recorded · 633 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 8 recorded · 8 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 9.5 min · 658 recorded · 653 measured · Source: the US BTS 07:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 09:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · 11.9 min · 593 recorded · 590 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 65 recorded · 65 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · 22.8 min · 810 recorded · 804 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 155 recorded · 152 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · 23.1 min · 647 recorded · 633 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 8 recorded · 8 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 658 · 658 recorded · 653 measured · Source: the US BTS 07:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 09:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · 593 · 593 recorded · 590 measured · Source: the US BTS 12:00 · 65 · 65 recorded · 65 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · 810 · 810 recorded · 804 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 17:00 · 155 · 155 recorded · 152 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · 647 · 647 recorded · 633 measured · Source: the US BTS 20:00 · 8 · 8 recorded · 8 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:0090.7%9.5 min653658
07:00No observations———
08:00No observations———
09:00No observations———
10:00No observations———
11:0080.0%11.9 min590593
12:00Fewer than 200 measured departures—6565
13:00No observations———
14:0076.1%22.8 min804810
15:00No observations———
16:00No observations———
17:00Fewer than 200 measured departures—152155
18:00No observations———
19:0073.1%23.1 min633647
20:00Fewer than 200 measured departures—88
21:00No observations———
22:00No observations———
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 77.6% · 420 recorded · 420 measured · Source: the US BTS Tuesday · 82.0% · 420 recorded · 412 measured · Source: the US BTS Wednesday · 78.6% · 420 recorded · 415 measured · Source: the US BTS Thursday · 75.3% · 418 recorded · 413 measured · Source: the US BTS Friday · 77.0% · 420 recorded · 413 measured · Source: the US BTS Saturday · 81.3% · 418 recorded · 412 measured · Source: the US BTS Sunday · 77.6% · 420 recorded · 420 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 15.7 min · 420 recorded · 420 measured · Source: the US BTS Tuesday · 11.6 min · 420 recorded · 412 measured · Source: the US BTS Wednesday · 19.1 min · 420 recorded · 415 measured · Source: the US BTS Thursday · 21.5 min · 418 recorded · 413 measured · Source: the US BTS Friday · 23.7 min · 420 recorded · 413 measured · Source: the US BTS Saturday · 16.0 min · 418 recorded · 412 measured · Source: the US BTS Sunday · 18.5 min · 420 recorded · 420 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 420 · 420 recorded · 420 measured · Source: the US BTS Tuesday · 420 · 420 recorded · 412 measured · Source: the US BTS Wednesday · 420 · 420 recorded · 415 measured · Source: the US BTS Thursday · 418 · 418 recorded · 413 measured · Source: the US BTS Friday · 420 · 420 recorded · 413 measured · Source: the US BTS Saturday · 418 · 418 recorded · 412 measured · Source: the US BTS Sunday · 420 · 420 recorded · 420 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday77.6%15.7 min420420
Tuesday82.0%11.6 min412420
Wednesday78.6%19.1 min415420
Thursday75.3%21.5 min413418
Friday77.0%23.7 min413420
Saturday81.3%16.0 min412418
Sunday77.6%18.5 min420420

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · 80.8% · 248 recorded · 245 measured · Source: the US BTS Feb · 73.9% · 224 recorded · 222 measured · Source: the US BTS Mar · 85.0% · 248 recorded · 246 measured · Source: the US BTS Apr · 85.4% · 240 recorded · 239 measured · Source: the US BTS May · 84.2% · 268 recorded · 265 measured · Source: the US BTS Jun · 66.6% · 300 recorded · 296 measured · Source: the US BTS Jul · 69.5% · 304 recorded · 298 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 186 recorded · 182 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 180 recorded · 180 measured · Source: the US BTS Oct · 84.7% · 254 recorded · 254 measured · Source: the US BTS Nov · 84.8% · 236 recorded · 230 measured · Source: the US BTS Dec · 82.3% · 248 recorded · 248 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 16.2 min · 248 recorded · 245 measured · Source: the US BTS Feb · 20.0 min · 224 recorded · 222 measured · Source: the US BTS Mar · 11.7 min · 248 recorded · 246 measured · Source: the US BTS Apr · 10.6 min · 240 recorded · 239 measured · Source: the US BTS May · 12.9 min · 268 recorded · 265 measured · Source: the US BTS Jun · 35.7 min · 300 recorded · 296 measured · Source: the US BTS Jul · 26.9 min · 304 recorded · 298 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 186 recorded · 182 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 180 recorded · 180 measured · Source: the US BTS Oct · 11.9 min · 254 recorded · 254 measured · Source: the US BTS Nov · 13.3 min · 236 recorded · 230 measured · Source: the US BTS Dec · 12.8 min · 248 recorded · 248 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 248 · 248 recorded · 245 measured · Source: the US BTS Feb · 224 · 224 recorded · 222 measured · Source: the US BTS Mar · 248 · 248 recorded · 246 measured · Source: the US BTS Apr · 240 · 240 recorded · 239 measured · Source: the US BTS May · 268 · 268 recorded · 265 measured · Source: the US BTS Jun · 300 · 300 recorded · 296 measured · Source: the US BTS Jul · 304 · 304 recorded · 298 measured · Source: the US BTS Aug · 186 · 186 recorded · 182 measured · Source: the US BTS Sep · 180 · 180 recorded · 180 measured · Source: the US BTS Oct · 254 · 254 recorded · 254 measured · Source: the US BTS Nov · 236 · 236 recorded · 230 measured · Source: the US BTS Dec · 248 · 248 recorded · 248 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan80.8%16.2 min245248
Feb73.9%20.0 min222224
Mar85.0%11.7 min246248
Apr85.4%10.6 min239240
May84.2%12.9 min265268
Jun66.6%35.7 min296300
Jul69.5%26.9 min298304
AugFewer than 200 measured departures—182186
SepFewer than 200 measured departures—180180
Oct84.7%11.9 min254254
Nov84.8%13.3 min230236
Dec82.3%12.8 min248248

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 77.7% 2,280
  • Delayed >15 min 21.3% 625
  • Cancelled 1.1% 31
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

11
11 of 11
Flight numbersBy direction DeparturesOn time
OO5388 DEN → HLN 643 79.7%
OO5911 HLN → DEN 640 75.8%
OO4705 DEN → HLN 623 71.9%
OO5514 HLN → DEN 383 88.2%
OO4660 HLN → DEN 207 95.2%
OO5784 HLN → DEN 155 55.9%
OO5532 DEN → HLN 68 83.8%
OO5567 DEN → HLN 52 72.6%
OO5954 DEN → HLN 35 71.4%
OO4754 DEN → HLN 32 96.9%
OO5279 HLN → DEN 30 86.7%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 122 −30.7% 0 76.2%
June 2026 120 −31.8% 0 80.8%
May 2026 124 −12.1% 0 95.2%
April 2026 120 +0.8% 0 95.8%
March 2026 122 −1.6% 2 82.0%
February 2026 111 +0.0% 1 87.4%
January 2026 124 +2.5% 0 91.9%
December 2025 124 +0.0% 0 76.6%
November 2025 116 +1.8% 2 89.7%
October 2025 174 +117.5% 0 83.9%
September 2025 180 0 81.7%
August 2025 182 4 64.3%
July 2025 176 6 64.8%
June 2025 176 4 56.8%
May 2025 141 3 74.5%
April 2025 119 1 74.8%
March 2025 124 0 87.9%
February 2025 111 1 60.4%
January 2025 121 3 69.4%
December 2024 124 0 87.9%
November 2024 114 4 79.8%
October 2024 80 0 86.3%

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