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1,003 km · Domestic

Denver (DEN) – Great Falls (GTF)

In July 2026, 122 flights operated between Denver and Great Falls (both directions), and 68.0% left on time, according to the US BTS.

Flights operated · latest month122▼ 1.6%vs July 2025
On-time departures82.4%Average delay 12.5 min
Cancelled0.6%17 of 2,626 scheduled flights
Airlines2
Rank in country#1,431

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

Flights per month

Partial coverage: only airlines that report on-time data to the US DOT · 22 of 22 periods have data

October 2024 March 2025 September 2025 February 2026 July 2026

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

The most recent periods19 periods

Period	Flights operated 2025	Flights operated 2026	Change vs last year
January	124	122	▼ 1.6%
February	112	110	▼ 1.8%
March	124	122	▼ 1.6%
April	118	120	▲ 1.7%
May	123	122	▼ 0.8%
June	120	120	0.0%
July	124	122	▼ 1.6%
August	122	–	–
September	120	–	–
October	123	–	in progress
November	118	–	–
December	124	–	–
Year to date (Jan–Jul)	845	838	▼ 0.8%

On-time departures by month

Partial coverage: only airlines that report on-time data to the US DOT · 22 of 22 periods have data

October 2024 March 2025 September 2025 February 2026 July 2026

Departures within 15 minutes of schedule.

The most recent periods19 periods

Period	On-time departures 2025	On-time departures 2026	Change vs last year
January	84.7%	92.6%	▲ 9.3%
February	80.4%	87.3%	▲ 8.6%
March	87.1%	83.6%	▼ 4.0%
April	79.7%	90.8%	▲ 13.9%
May	78.9%	77.0%	▼ 2.4%
June	65.0%	65.0%	0.0%
July	71.0%	68.0%	▼ 4.2%
August	75.4%	–	–
September	85.8%	–	–
October	87.0%	–	in progress
November	94.9%	–	–
December	86.3%	–	–
Year-to-date average (Jan–Jul)	78.1%	80.6%	▲ 3.2%

Cancelled flights by month

Partial coverage: only airlines that report on-time data to the US DOT · 22 of 22 periods have data

October 2024 March 2025 September 2025 February 2026 July 2026

The most recent periods19 periods

Period	Cancelled flights 2025	Cancelled flights 2026	Change vs last year
January	0	2	–
February	0	2	–
March	0	2	–
April	2	0	▼ 100.0%
May	1	2	▲ 100.0%
June	0	0	–
July	0	0	–
August	2	–	–
September	0	–	–
October	1	–	in progress
November	0	–	–
December	0	–	–
Year to date (Jan–Jul)	3	8	▲ 166.7%

By direction

DEN → GTF

Scheduled flights: 1,313
Flights operated: 1,305
Cancelled: 8 · 0.6%
On-time departures: 79.0%

GTF → DEN

Scheduled flights: 1,313
Flights operated: 1,304
Cancelled: 9 · 0.7%
On-time departures: 85.7%

DEN → GTF and GTF → DEN counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026

Airline	Scheduled flights	Share	On-time departures	Cancelled
United Airlines UA	1,377	52.4%	78.1%	7
SkyWest Airlines OO	1,249	47.6%	87.1%	10

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 delay06:00–07:005.9min · 571 recorded · 567 measured

Gap to highest-delay hour20.0min06:00 ↔ 19:00

Recorded flights2,626DEN–GTF

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT

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

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

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

View the figures

Departure hour	On-time departures	Average departure delay	With departure time	Recorded flights
00:00	No observations	—	—	—
01:00	No observations	—	—	—
02:00	No observations	—	—	—
03:00	No observations	—	—	—
04:00	No observations	—	—	—
05:00	No observations	—	—	—
06:00	93.0%	5.9 min	567	571
07:00	Fewer than 200 measured departures	—	86	87
08:00	No observations	—	—	—
09:00	No observations	—	—	—
10:00	No observations	—	—	—
11:00	86.0%	6.6 min	656	658
12:00	No observations	—	—	—
13:00	No observations	—	—	—
14:00	78.3%	14.4 min	651	655
15:00	No observations	—	—	—
16:00	No observations	—	—	—
17:00	No observations	—	—	—
18:00	No observations	—	—	—
19:00	70.0%	25.9 min	593	599
20:00	Fewer than 200 measured departures	—	56	56
21:00	No observations	—	—	—
22:00	No observations	—	—	—
23:00	No observations	—	—	—

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT

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

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

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

View the figures

Day of week	On-time departures	Average departure delay	With departure time	Recorded flights
Monday	85.4%	7.6 min	376	376
Tuesday	80.0%	12.7 min	374	376
Wednesday	81.5%	11.8 min	372	376
Thursday	81.9%	20.0 min	370	372
Friday	81.5%	12.5 min	373	376
Saturday	82.7%	12.1 min	369	374
Sunday	83.7%	10.8 min	375	376

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

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

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

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

View the figures

Month of year	On-time departures	Average departure delay	With departure time	Recorded flights
Jan	88.6%	3.1 min	246	248
Feb	83.8%	11.6 min	222	224
Mar	85.4%	6.9 min	246	248
Apr	85.3%	6.7 min	238	240
May	78.0%	16.7 min	245	248
Jun	65.0%	31.8 min	240	240
Jul	69.5%	34.2 min	246	246
Aug	Fewer than 200 measured departures	—	122	124
Sep	Fewer than 200 measured departures	—	120	120
Oct	87.7%	4.1 min	203	204
Nov	91.4%	0.1 min	233	236
Dec	91.9%	7.2 min	248	248

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 81.8% 2,149
Delayed >15 min 17.5% 460
Cancelled 0.6% 17
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

26

26 of 26

Flight numbers	By direction	Departures	On time
OO5441	GTF → DEN	295	85.3%
OO4750	GTF → DEN	270	91.8%
OO5240	DEN → GTF	201	79.2%
UA1965	GTF → DEN	157	66.9%
OO5331	DEN → GTF	154	84.4%
OO5445	DEN → GTF	111	92.7%
UA1183	DEN → GTF	105	92.4%
UA1409	DEN → GTF	89	79.8%
OO5253	DEN → GTF	74	82.2%
UA1925	GTF → DEN	72	87.3%
UA1354	DEN → GTF	71	40.9%
UA2027	GTF → DEN	71	61.4%
OO5329	DEN → GTF	68	94.1%
UA723	DEN → GTF	68	73.5%
UA1226	DEN → GTF	53	73.6%
UA1656	GTF → DEN	53	84.9%
UA2075	GTF → DEN	53	98.1%
UA2100	DEN → GTF	53	92.5%
OO4782	GTF → DEN	37	97.2%
UA1865	GTF → DEN	37	94.6%
UA2128	DEN → GTF	37	75.7%
UA1840	GTF → DEN	36	91.7%
UA2121	DEN → GTF	36	50.0%
UA371	GTF → DEN	36	97.2%
UA1390	DEN → GTF	35	40.0%
UA2317	GTF → DEN	31	90.0%

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

Period	Flights operated	Change vs last year	Cancelled	On-time departures
July 2026	122	−1.6%	0	68.0%
June 2026	120	+0.0%	0	65.0%
May 2026	122	−0.8%	2	77.0%
April 2026	120	+1.7%	0	90.8%
March 2026	122	−1.6%	2	83.6%
February 2026	110	−1.8%	2	87.3%
January 2026	122	−1.6%	2	92.6%
December 2025	124	+0.0%	0	86.3%
November 2025	118	+2.6%	0	94.9%
October 2025	123	+53.8%	1	87.0%
September 2025	120		0	85.8%
August 2025	122		2	75.4%
July 2025	124		0	71.0%
June 2025	120		0	65.0%
May 2025	123		1	78.9%
April 2025	118		2	79.7%
March 2025	124		0	87.1%
February 2025	112		0	80.4%
January 2025	124		0	84.7%
December 2024	124		0	97.6%
November 2024	115		3	87.8%
October 2024	80		0	88.8%