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1,042 km · Domestic

Boise Air Terminal/Gowen Field (BOI) – Denver (DEN)

In July 2026, 516 flights operated between Boise Air Terminal/Gowen Field and Denver (both directions), and 73.6% 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
January490511▲ 4.3%
February443467▲ 5.4%
March488504▲ 3.3%
April483496▲ 2.7%
May514521▲ 1.4%
June507506▼ 0.2%
July515516▲ 0.2%
August516––
September500––
October519–in progress
November490––
December517––
Year to date (Jan–Jul)3,4403,521▲ 2.4%

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
January82.7%88.5%▲ 7.0%
February83.3%83.9%▲ 0.7%
March85.9%80.0%▼ 6.9%
April80.5%83.3%▲ 3.5%
May72.6%76.2%▲ 5.0%
June65.7%70.4%▲ 7.2%
July69.5%73.6%▲ 5.9%
August74.6%––
September82.6%––
October83.2%–in progress
November85.7%––
December77.8%––
Year-to-date average (Jan–Jul)77.2%79.4%▲ 2.9%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January00–
February10▼ 100.0%
March02–
April10▼ 100.0%
May21▼ 50.0%
June10▼ 100.0%
July72▼ 71.4%
August2––
September0––
October0–in progress
November0––
December0––
Year to date (Jan–Jul)125▼ 58.3%

Airlines on this route

  1. Southwest Airlines 36.4%
  2. United Airlines 34.1%
  3. SkyWest Airlines 26.6%
  4. Frontier Airlines 2.9%

Oct 1, 2024 – Jul 31, 2026

By direction

BOI → DEN

Scheduled flights
5,393
Flights operated
5,378
Cancelled
15 · 0.3%
On-time departures
83.0%

DEN → BOI

Scheduled flights
5,394
Flights operated
5,382
Cancelled
12 · 0.2%
On-time departures
76.6%

BOI → DEN and DEN → BOI counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Southwest Airlines WN 3,926 36.4% 74.8% 8
United Airlines UA 3,677 34.1% 81.4% 10
SkyWest Airlines OO 2,874 26.6% 84.7% 8
Frontier Airlines F9 310 2.9% 79.6% 1

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 delay05:00–06:00-0.3min · 866 recorded · 865 measured
Gap to highest-delay hour29.7min05:00 ↔ 16:00
Recorded flights10,787BOI–DEN

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 · 94.8% · 866 recorded · 865 measured · Source: the US BTS 06:00 · 94.2% · 469 recorded · 469 measured · Source: the US BTS 07:00 · 93.4% · 1,258 recorded · 1,255 measured · Source: the US BTS 08:00 · 91.0% · 569 recorded · 567 measured · Source: the US BTS 09:00 · 85.6% · 229 recorded · 229 measured · Source: the US BTS 10:00 · 88.3% · 934 recorded · 932 measured · Source: the US BTS 11:00 · 83.5% · 941 recorded · 941 measured · Source: the US BTS 12:00 · 75.3% · 228 recorded · 227 measured · Source: the US BTS 13:00 · 73.1% · 342 recorded · 342 measured · Source: the US BTS 14:00 · 77.0% · 983 recorded · 980 measured · Source: the US BTS 15:00 · 75.3% · 790 recorded · 789 measured · Source: the US BTS 16:00 · 56.7% · 416 recorded · 413 measured · Source: the US BTS 17:00 · 69.2% · 899 recorded · 897 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 4 recorded · 4 measured · Source: the US BTS 19:00 · 72.2% · 705 recorded · 702 measured · Source: the US BTS 20:00 · 63.9% · 636 recorded · 632 measured · Source: the US BTS 21:00 · 63.6% · 310 recorded · 310 measured · Source: the US BTS 22:00 · 47.6% · 208 recorded · 206 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 · -0.3 min · 866 recorded · 865 measured · Source: the US BTS 06:00 · 5.3 min · 469 recorded · 469 measured · Source: the US BTS 07:00 · 1.0 min · 1,258 recorded · 1,255 measured · Source: the US BTS 08:00 · 1.8 min · 569 recorded · 567 measured · Source: the US BTS 09:00 · 7.8 min · 229 recorded · 229 measured · Source: the US BTS 10:00 · 5.6 min · 934 recorded · 932 measured · Source: the US BTS 11:00 · 8.1 min · 941 recorded · 941 measured · Source: the US BTS 12:00 · 20.0 min · 228 recorded · 227 measured · Source: the US BTS 13:00 · 11.9 min · 342 recorded · 342 measured · Source: the US BTS 14:00 · 16.6 min · 983 recorded · 980 measured · Source: the US BTS 15:00 · 13.4 min · 790 recorded · 789 measured · Source: the US BTS 16:00 · 29.4 min · 416 recorded · 413 measured · Source: the US BTS 17:00 · 19.2 min · 899 recorded · 897 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 4 recorded · 4 measured · Source: the US BTS 19:00 · 15.6 min · 705 recorded · 702 measured · Source: the US BTS 20:00 · 24.3 min · 636 recorded · 632 measured · Source: the US BTS 21:00 · 22.8 min · 310 recorded · 310 measured · Source: the US BTS 22:00 · 28.1 min · 208 recorded · 206 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 · 866 · 866 recorded · 865 measured · Source: the US BTS 06:00 · 469 · 469 recorded · 469 measured · Source: the US BTS 07:00 · 1,258 · 1,258 recorded · 1,255 measured · Source: the US BTS 08:00 · 569 · 569 recorded · 567 measured · Source: the US BTS 09:00 · 229 · 229 recorded · 229 measured · Source: the US BTS 10:00 · 934 · 934 recorded · 932 measured · Source: the US BTS 11:00 · 941 · 941 recorded · 941 measured · Source: the US BTS 12:00 · 228 · 228 recorded · 227 measured · Source: the US BTS 13:00 · 342 · 342 recorded · 342 measured · Source: the US BTS 14:00 · 983 · 983 recorded · 980 measured · Source: the US BTS 15:00 · 790 · 790 recorded · 789 measured · Source: the US BTS 16:00 · 416 · 416 recorded · 413 measured · Source: the US BTS 17:00 · 899 · 899 recorded · 897 measured · Source: the US BTS 18:00 · 4 · 4 recorded · 4 measured · Source: the US BTS 19:00 · 705 · 705 recorded · 702 measured · Source: the US BTS 20:00 · 636 · 636 recorded · 632 measured · Source: the US BTS 21:00 · 310 · 310 recorded · 310 measured · Source: the US BTS 22:00 · 208 · 208 recorded · 206 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———
05:0094.8%-0.3 min865866
06:0094.2%5.3 min469469
07:0093.4%1.0 min1,2551,258
08:0091.0%1.8 min567569
09:0085.6%7.8 min229229
10:0088.3%5.6 min932934
11:0083.5%8.1 min941941
12:0075.3%20.0 min227228
13:0073.1%11.9 min342342
14:0077.0%16.6 min980983
15:0075.3%13.4 min789790
16:0056.7%29.4 min413416
17:0069.2%19.2 min897899
18:00Fewer than 200 measured departures—44
19:0072.2%15.6 min702705
20:0063.9%24.3 min632636
21:0063.6%22.8 min310310
22:0047.6%28.1 min206208
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 79.0% · 1,519 recorded · 1,518 measured · Source: the US BTS Tuesday · 81.1% · 1,530 recorded · 1,526 measured · Source: the US BTS Wednesday · 83.1% · 1,504 recorded · 1,500 measured · Source: the US BTS Thursday · 78.2% · 1,599 recorded · 1,593 measured · Source: the US BTS Friday · 78.3% · 1,535 recorded · 1,527 measured · Source: the US BTS Saturday · 81.3% · 1,437 recorded · 1,435 measured · Source: the US BTS Sunday · 78.3% · 1,663 recorded · 1,661 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 · 10.5 min · 1,519 recorded · 1,518 measured · Source: the US BTS Tuesday · 8.8 min · 1,530 recorded · 1,526 measured · Source: the US BTS Wednesday · 8.8 min · 1,504 recorded · 1,500 measured · Source: the US BTS Thursday · 14.5 min · 1,599 recorded · 1,593 measured · Source: the US BTS Friday · 14.6 min · 1,535 recorded · 1,527 measured · Source: the US BTS Saturday · 9.7 min · 1,437 recorded · 1,435 measured · Source: the US BTS Sunday · 12.8 min · 1,663 recorded · 1,661 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 · 1,519 · 1,519 recorded · 1,518 measured · Source: the US BTS Tuesday · 1,530 · 1,530 recorded · 1,526 measured · Source: the US BTS Wednesday · 1,504 · 1,504 recorded · 1,500 measured · Source: the US BTS Thursday · 1,599 · 1,599 recorded · 1,593 measured · Source: the US BTS Friday · 1,535 · 1,535 recorded · 1,527 measured · Source: the US BTS Saturday · 1,437 · 1,437 recorded · 1,435 measured · Source: the US BTS Sunday · 1,663 · 1,663 recorded · 1,661 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday79.0%10.5 min1,5181,519
Tuesday81.1%8.8 min1,5261,530
Wednesday83.1%8.8 min1,5001,504
Thursday78.2%14.5 min1,5931,599
Friday78.3%14.6 min1,5271,535
Saturday81.3%9.7 min1,4351,437
Sunday78.3%12.8 min1,6611,663

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 · 85.6% · 1,001 recorded · 1,001 measured · Source: the US BTS Feb · 83.6% · 911 recorded · 910 measured · Source: the US BTS Mar · 82.9% · 994 recorded · 992 measured · Source: the US BTS Apr · 81.9% · 980 recorded · 979 measured · Source: the US BTS May · 74.4% · 1,038 recorded · 1,035 measured · Source: the US BTS Jun · 68.0% · 1,014 recorded · 1,013 measured · Source: the US BTS Jul · 71.6% · 1,040 recorded · 1,031 measured · Source: the US BTS Aug · 74.6% · 518 recorded · 516 measured · Source: the US BTS Sep · 82.6% · 500 recorded · 500 measured · Source: the US BTS Oct · 86.6% · 831 recorded · 831 measured · Source: the US BTS Nov · 86.5% · 953 recorded · 947 measured · Source: the US BTS Dec · 80.9% · 1,007 recorded · 1,005 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 · 6.2 min · 1,001 recorded · 1,001 measured · Source: the US BTS Feb · 11.0 min · 911 recorded · 910 measured · Source: the US BTS Mar · 9.9 min · 994 recorded · 992 measured · Source: the US BTS Apr · 11.4 min · 980 recorded · 979 measured · Source: the US BTS May · 15.2 min · 1,038 recorded · 1,035 measured · Source: the US BTS Jun · 18.1 min · 1,014 recorded · 1,013 measured · Source: the US BTS Jul · 19.3 min · 1,040 recorded · 1,031 measured · Source: the US BTS Aug · 16.8 min · 518 recorded · 516 measured · Source: the US BTS Sep · 6.9 min · 500 recorded · 500 measured · Source: the US BTS Oct · 4.3 min · 831 recorded · 831 measured · Source: the US BTS Nov · 5.8 min · 953 recorded · 947 measured · Source: the US BTS Dec · 10.8 min · 1,007 recorded · 1,005 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 · 1,001 · 1,001 recorded · 1,001 measured · Source: the US BTS Feb · 911 · 911 recorded · 910 measured · Source: the US BTS Mar · 994 · 994 recorded · 992 measured · Source: the US BTS Apr · 980 · 980 recorded · 979 measured · Source: the US BTS May · 1,038 · 1,038 recorded · 1,035 measured · Source: the US BTS Jun · 1,014 · 1,014 recorded · 1,013 measured · Source: the US BTS Jul · 1,040 · 1,040 recorded · 1,031 measured · Source: the US BTS Aug · 518 · 518 recorded · 516 measured · Source: the US BTS Sep · 500 · 500 recorded · 500 measured · Source: the US BTS Oct · 831 · 831 recorded · 831 measured · Source: the US BTS Nov · 953 · 953 recorded · 947 measured · Source: the US BTS Dec · 1,007 · 1,007 recorded · 1,005 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan85.6%6.2 min1,0011,001
Feb83.6%11.0 min910911
Mar82.9%9.9 min992994
Apr81.9%11.4 min979980
May74.4%15.2 min1,0351,038
Jun68.0%18.1 min1,0131,014
Jul71.6%19.3 min1,0311,040
Aug74.6%16.8 min516518
Sep82.6%6.9 min500500
Oct86.6%4.3 min831831
Nov86.5%5.8 min947953
Dec80.9%10.8 min1,0051,007

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 79.6% 8,589
  • Delayed >15 min 20.1% 2,171
  • Cancelled 0.3% 27
  • 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

108
108 of 108
Flight numbersBy direction DeparturesOn time
UA2173 BOI → DEN 656 78.8%
UA1782 BOI → DEN 622 94.0%
OO5923 DEN → BOI 528 70.0%
UA1125 DEN → BOI 495 82.2%
UA2014 DEN → BOI 474 70.7%
UA2602 DEN → BOI 290 77.9%
OO5924 BOI → DEN 238 89.9%
OO4775 BOI → DEN 232 94.8%
UA395 BOI → DEN 220 61.4%
F993933 DEN → BOI 154 83.1%
F993934 BOI → DEN 154 75.8%
OO5837 BOI → DEN 135 81.5%
OO6041 BOI → DEN 135 92.6%
UA2255 DEN → BOI 125 87.2%
UA367 DEN → BOI 125 87.2%
UA355 DEN → BOI 103 94.2%
WN1981 DEN → BOI 99 84.9%
WN2051 BOI → DEN 87 91.9%
UA213 BOI → DEN 85 90.5%
OO5729 DEN → BOI 83 91.6%
WN4698 BOI → DEN 83 78.3%
OO4734 DEN → BOI 82 95.1%
WN171 BOI → DEN 79 94.9%
WN981 DEN → BOI 79 70.9%
OO6045 DEN → BOI 78 75.6%
OO5788 DEN → BOI 77 94.8%
OO4718 DEN → BOI 71 83.1%
UA2395 BOI → DEN 71 54.9%
OO4637 BOI → DEN 68 75.0%
UA2663 BOI → DEN 67 81.8%
WN1821 DEN → BOI 66 69.7%
WN1375 BOI → DEN 64 87.5%
WN1376 BOI → DEN 64 90.6%
WN1385 DEN → BOI 64 79.7%
WN927 DEN → BOI 64 60.9%
WN1370 BOI → DEN 61 91.8%
WN1388 DEN → BOI 61 85.3%
WN2479 DEN → BOI 61 33.3%
WN3169 BOI → DEN 61 60.0%
WN1369 BOI → DEN 58 60.3%
WN1418 DEN → BOI 58 65.5%
WN1527 BOI → DEN 58 72.4%
WN1796 DEN → BOI 58 50.0%
WN205 DEN → BOI 58 50.0%
WN2061 BOI → DEN 58 98.3%
WN2128 DEN → BOI 58 84.5%
WN2414 DEN → BOI 58 55.2%
WN3594 BOI → DEN 58 77.6%
WN3806 DEN → BOI 58 29.3%
WN698 BOI → DEN 58 96.6%
WN699 BOI → DEN 58 87.9%
OO5927 DEN → BOI 57 89.5%
WN1543 BOI → DEN 57 89.5%
WN1744 DEN → BOI 57 79.0%
WN2916 BOI → DEN 57 89.5%
WN2259 DEN → BOI 55 78.2%
OO4666 BOI → DEN 53 90.6%
OO5361 BOI → DEN 53 90.4%
OO4678 DEN → BOI 52 96.2%
OO5525 DEN → BOI 52 80.8%
OO5526 BOI → DEN 52 80.8%
UA1824 DEN → BOI 52 94.2%
WN1379 DEN → BOI 52 38.5%
WN1235 BOI → DEN 51 52.9%
WN1462 DEN → BOI 50 92.0%
WN1795 DEN → BOI 49 61.2%
WN700 BOI → DEN 49 18.8%
WN818 DEN → BOI 49 89.8%
OO5830 BOI → DEN 47 85.1%
WN2914 BOI → DEN 47 95.7%
WN685 BOI → DEN 47 85.1%
WN4429 BOI → DEN 46 89.1%
WN1002 BOI → DEN 42 76.2%
WN3379 BOI → DEN 42 85.7%
WN2756 BOI → DEN 40 25.0%
OO4631 BOI → DEN 37 81.1%
OO4762 DEN → BOI 37 81.1%
OO4765 DEN → BOI 37 94.6%
OO4792 DEN → BOI 37 75.7%
UA236 DEN → BOI 37 78.4%
OO4648 BOI → DEN 36 82.9%
OO4682 BOI → DEN 36 94.4%
OO4700 BOI → DEN 36 88.9%
OO4806 DEN → BOI 36 88.9%
OO4730 BOI → DEN 35 82.9%
OO5228 DEN → BOI 35 88.6%
UA1442 DEN → BOI 35 100.0%
UA532 BOI → DEN 35 94.3%
WN3548 DEN → BOI 34 79.4%
WN4625 BOI → DEN 34 88.2%
WN1194 BOI → DEN 33 97.0%
WN1198 BOI → DEN 33 53.1%
WN1202 DEN → BOI 33 78.8%
WN1436 DEN → BOI 33 57.6%
WN1491 DEN → BOI 33 54.6%
WN2460 DEN → BOI 33 48.5%
WN2753 DEN → BOI 33 75.8%
WN3047 BOI → DEN 33 97.0%
OO5226 BOI → DEN 32 100.0%
WN1243 DEN → BOI 32 58.1%
WN1435 BOI → DEN 31 96.8%
WN2434 DEN → BOI 31 83.9%
WN2436 DEN → BOI 31 51.6%
UA1228 BOI → DEN 30 83.3%
UA1464 DEN → BOI 30 96.7%
UA517 BOI → DEN 30 93.3%
WN1416 DEN → BOI 30 96.7%
WN1436 BOI → DEN 30 60.0%

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
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 516 +0.2% 2 73.6%
June 2026 506 −0.2% 0 70.4%
May 2026 521 +1.4% 1 76.2%
April 2026 496 +2.7% 0 83.3%
March 2026 504 +3.3% 2 80.0%
February 2026 467 +5.4% 0 83.9%
January 2026 511 +4.3% 0 88.5%
December 2025 517 +5.9% 0 77.8%
November 2025 490 +7.2% 0 85.7%
October 2025 519 +66.3% 0 83.2%
September 2025 500 0 82.6%
August 2025 516 2 74.6%
July 2025 515 7 69.5%
June 2025 507 1 65.7%
May 2025 514 2 72.6%
April 2025 483 1 80.5%
March 2025 488 0 85.9%
February 2025 443 1 83.3%
January 2025 490 0 82.7%
December 2024 488 2 84.2%
November 2024 457 6 87.3%
October 2024 312 0 92.3%

How to read this chart

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