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1,903 km · Domestic

Bozeman Yellowstone (BZN) – Chicago O'Hare (ORD)

In July 2026, 302 flights operated between Bozeman Yellowstone and Chicago O'Hare (both directions), and 69.5% 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
January159205▲ 28.9%
February135192▲ 42.2%
March166228▲ 37.3%
April6593▲ 43.1%
May140189▲ 35.0%
June268299▲ 11.6%
July280302▲ 7.9%
August280––
September266––
October228–in progress
November62––
December167––
Year to date (Jan–Jul)1,2131,508▲ 24.3%

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
January71.1%69.8%▼ 1.8%
February73.3%75.0%▲ 2.3%
March75.9%69.7%▼ 8.2%
April84.6%75.3%▼ 11.0%
May89.3%83.6%▼ 6.4%
June81.3%74.2%▼ 8.7%
July71.1%69.5%▼ 2.3%
August76.8%––
September79.3%––
October82.9%–in progress
November80.6%––
December66.5%––
Year-to-date average (Jan–Jul)78.1%73.9%▼ 5.4%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January02–
February00–
March13▲ 200.0%
April220.0%
May01–
June01–
July46▲ 50.0%
August8––
September0––
October1–in progress
November0––
December0––
Year to date (Jan–Jul)715▲ 114.3%

Airlines on this route

  1. United Airlines 53.5%
  2. American Airlines 33.1%
  3. SkyWest Airlines 9.5%
  4. Envoy Air 3.9%

Oct 1, 2024 – Jul 31, 2026

By direction

BZN → ORD

Scheduled flights
2,052
Flights operated
2,035
Cancelled
17 · 0.8%
On-time departures
77.5%

ORD → BZN

Scheduled flights
2,053
Flights operated
2,039
Cancelled
14 · 0.7%
On-time departures
74.7%

BZN → ORD and ORD → BZN counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
United Airlines UA 2,195 53.5% 79.5% 24
American Airlines AA 1,359 33.1% 68.4% 7
SkyWest Airlines OO 389 9.5% 82.8% 0
Envoy Air MQ 162 3.9% 79.0% 0

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 delay07:00–08:000.2min · 318 recorded · 313 measured
Gap to highest-delay hour38.0min07:00 ↔ 13:00
Recorded flights4,105BZN–ORD

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 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 92.7% · 318 recorded · 313 measured · Source: the US BTS 08:00 · 90.9% · 313 recorded · 309 measured · Source: the US BTS 09:00 · 84.6% · 732 recorded · 729 measured · Source: the US BTS 10:00 · 75.7% · 461 recorded · 460 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 96 recorded · 96 measured · Source: the US BTS 12:00 · 78.3% · 844 recorded · 840 measured · Source: the US BTS 13:00 · 63.6% · 484 recorded · 481 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 68 recorded · 68 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 60 recorded · 60 measured · Source: the US BTS 16:00 · 71.7% · 291 recorded · 290 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 61 recorded · 60 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 191 recorded · 185 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 163 recorded · 160 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 22 recorded · 22 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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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 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 0.2 min · 318 recorded · 313 measured · Source: the US BTS 08:00 · 3.0 min · 313 recorded · 309 measured · Source: the US BTS 09:00 · 6.9 min · 732 recorded · 729 measured · Source: the US BTS 10:00 · 13.3 min · 461 recorded · 460 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 96 recorded · 96 measured · Source: the US BTS 12:00 · 14.9 min · 844 recorded · 840 measured · Source: the US BTS 13:00 · 38.2 min · 484 recorded · 481 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 68 recorded · 68 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 60 recorded · 60 measured · Source: the US BTS 16:00 · 22.8 min · 291 recorded · 290 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 61 recorded · 60 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 191 recorded · 185 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 163 recorded · 160 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 22 recorded · 22 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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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 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 318 · 318 recorded · 313 measured · Source: the US BTS 08:00 · 313 · 313 recorded · 309 measured · Source: the US BTS 09:00 · 732 · 732 recorded · 729 measured · Source: the US BTS 10:00 · 461 · 461 recorded · 460 measured · Source: the US BTS 11:00 · 96 · 96 recorded · 96 measured · Source: the US BTS 12:00 · 844 · 844 recorded · 840 measured · Source: the US BTS 13:00 · 484 · 484 recorded · 481 measured · Source: the US BTS 14:00 · 68 · 68 recorded · 68 measured · Source: the US BTS 15:00 · 60 · 60 recorded · 60 measured · Source: the US BTS 16:00 · 291 · 291 recorded · 290 measured · Source: the US BTS 17:00 · 61 · 61 recorded · 60 measured · Source: the US BTS 18:00 · 1 · 1 recorded · 1 measured · Source: the US BTS 19:00 · 191 · 191 recorded · 185 measured · Source: the US BTS 20:00 · 163 · 163 recorded · 160 measured · Source: the US BTS 21:00 · 22 · 22 recorded · 22 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———
06:00No observations———
07:0092.7%0.2 min313318
08:0090.9%3.0 min309313
09:0084.6%6.9 min729732
10:0075.7%13.3 min460461
11:00Fewer than 200 measured departures—9696
12:0078.3%14.9 min840844
13:0063.6%38.2 min481484
14:00Fewer than 200 measured departures—6868
15:00Fewer than 200 measured departures—6060
16:0071.7%22.8 min290291
17:00Fewer than 200 measured departures—6061
18:00Fewer than 200 measured departures—11
19:00Fewer than 200 measured departures—185191
20:00Fewer than 200 measured departures—160163
21:00Fewer than 200 measured departures—2222
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 · 76.5% · 605 recorded · 600 measured · Source: the US BTS Tuesday · 79.5% · 513 recorded · 508 measured · Source: the US BTS Wednesday · 76.9% · 518 recorded · 515 measured · Source: the US BTS Thursday · 78.7% · 604 recorded · 601 measured · Source: the US BTS Friday · 72.7% · 621 recorded · 616 measured · Source: the US BTS Saturday · 76.0% · 621 recorded · 616 measured · Source: the US BTS Sunday · 73.3% · 623 recorded · 618 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 15.6 min · 605 recorded · 600 measured · Source: the US BTS Tuesday · 10.8 min · 513 recorded · 508 measured · Source: the US BTS Wednesday · 17.9 min · 518 recorded · 515 measured · Source: the US BTS Thursday · 14.5 min · 604 recorded · 601 measured · Source: the US BTS Friday · 29.2 min · 621 recorded · 616 measured · Source: the US BTS Saturday · 18.2 min · 621 recorded · 616 measured · Source: the US BTS Sunday · 18.4 min · 623 recorded · 618 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 605 · 605 recorded · 600 measured · Source: the US BTS Tuesday · 513 · 513 recorded · 508 measured · Source: the US BTS Wednesday · 518 · 518 recorded · 515 measured · Source: the US BTS Thursday · 604 · 604 recorded · 601 measured · Source: the US BTS Friday · 621 · 621 recorded · 616 measured · Source: the US BTS Saturday · 621 · 621 recorded · 616 measured · Source: the US BTS Sunday · 623 · 623 recorded · 618 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday76.5%15.6 min600605
Tuesday79.5%10.8 min508513
Wednesday76.9%17.9 min515518
Thursday78.7%14.5 min601604
Friday72.7%29.2 min616621
Saturday76.0%18.2 min616621
Sunday73.3%18.4 min618623

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 · 70.3% · 366 recorded · 364 measured · Source: the US BTS Feb · 74.3% · 327 recorded · 327 measured · Source: the US BTS Mar · 72.3% · 398 recorded · 394 measured · Source: the US BTS Apr · Fewer than 200 measured departures · 162 recorded · 158 measured · Source: the US BTS May · 86.0% · 330 recorded · 329 measured · Source: the US BTS Jun · 77.6% · 568 recorded · 567 measured · Source: the US BTS Jul · 70.3% · 592 recorded · 582 measured · Source: the US BTS Aug · 76.8% · 288 recorded · 280 measured · Source: the US BTS Sep · 79.3% · 266 recorded · 266 measured · Source: the US BTS Oct · 82.8% · 338 recorded · 337 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 130 recorded · 130 measured · Source: the US BTS Dec · 71.5% · 340 recorded · 340 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 31.8 min · 366 recorded · 364 measured · Source: the US BTS Feb · 20.5 min · 327 recorded · 327 measured · Source: the US BTS Mar · 22.4 min · 398 recorded · 394 measured · Source: the US BTS Apr · Fewer than 200 measured departures · 162 recorded · 158 measured · Source: the US BTS May · 5.0 min · 330 recorded · 329 measured · Source: the US BTS Jun · 19.2 min · 568 recorded · 567 measured · Source: the US BTS Jul · 23.1 min · 592 recorded · 582 measured · Source: the US BTS Aug · 18.1 min · 288 recorded · 280 measured · Source: the US BTS Sep · 9.8 min · 266 recorded · 266 measured · Source: the US BTS Oct · 5.2 min · 338 recorded · 337 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 130 recorded · 130 measured · Source: the US BTS Dec · 24.1 min · 340 recorded · 340 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 366 · 366 recorded · 364 measured · Source: the US BTS Feb · 327 · 327 recorded · 327 measured · Source: the US BTS Mar · 398 · 398 recorded · 394 measured · Source: the US BTS Apr · 162 · 162 recorded · 158 measured · Source: the US BTS May · 330 · 330 recorded · 329 measured · Source: the US BTS Jun · 568 · 568 recorded · 567 measured · Source: the US BTS Jul · 592 · 592 recorded · 582 measured · Source: the US BTS Aug · 288 · 288 recorded · 280 measured · Source: the US BTS Sep · 266 · 266 recorded · 266 measured · Source: the US BTS Oct · 338 · 338 recorded · 337 measured · Source: the US BTS Nov · 130 · 130 recorded · 130 measured · Source: the US BTS Dec · 340 · 340 recorded · 340 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan70.3%31.8 min364366
Feb74.3%20.5 min327327
Mar72.3%22.4 min394398
AprFewer than 200 measured departures—158162
May86.0%5.0 min329330
Jun77.6%19.2 min567568
Jul70.3%23.1 min582592
Aug76.8%18.1 min280288
Sep79.3%9.8 min266266
Oct82.8%5.2 min337338
NovFewer than 200 measured departures—130130
Dec71.5%24.1 min340340

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 75.5% 3,101
  • Delayed >15 min 23.7% 973
  • Cancelled 0.8% 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

35
35 of 35
Flight numbersBy direction DeparturesOn time
UA224 ORD → BZN 513 85.1%
UA2202 BZN → ORD 506 79.9%
UA1693 BZN → ORD 173 92.9%
AA1501 ORD → BZN 128 71.1%
UA2138 BZN → ORD 125 95.0%
UA533 ORD → BZN 116 58.8%
AA1501 BZN → ORD 115 62.6%
UA739 ORD → BZN 106 52.0%
AA2809 ORD → BZN 93 79.6%
OO5859 ORD → BZN 89 87.6%
AA2809 BZN → ORD 76 65.8%
AA1639 BZN → ORD 72 63.4%
AA1639 ORD → BZN 72 66.2%
AA1645 ORD → BZN 72 79.2%
AA3177 BZN → ORD 72 51.4%
UA623 ORD → BZN 72 77.8%
UA1744 BZN → ORD 71 68.6%
UA481 ORD → BZN 68 70.6%
OO5857 BZN → ORD 64 87.5%
AA1520 ORD → BZN 61 60.7%
AA1548 BZN → ORD 61 67.2%
AA463 ORD → BZN 40 56.4%
AA464 BZN → ORD 39 89.5%
OO4673 BZN → ORD 37 83.8%
OO5659 ORD → BZN 37 89.2%
UA554 BZN → ORD 37 89.2%
UA775 ORD → BZN 37 86.5%
AA2361 BZN → ORD 35 61.8%
AA2361 ORD → BZN 35 70.6%
UA2429 BZN → ORD 35 82.9%
AA3288 BZN → ORD 33 48.5%
AA2528 ORD → BZN 30 73.3%
AA3246 ORD → BZN 30 80.0%
AA3246 BZN → ORD 30 83.3%
AA961 BZN → ORD 30 50.0%

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 302 +7.9% 6 69.5%
June 2026 299 +11.6% 1 74.2%
May 2026 189 +35.0% 1 83.6%
April 2026 93 +43.1% 2 75.3%
March 2026 228 +37.3% 3 69.7%
February 2026 192 +42.2% 0 75.0%
January 2026 205 +28.9% 2 69.8%
December 2025 167 −3.5% 0 66.5%
November 2025 62 −8.8% 0 80.6%
October 2025 228 +109.2% 1 82.9%
September 2025 266 0 79.3%
August 2025 280 8 76.8%
July 2025 280 4 71.1%
June 2025 268 0 81.3%
May 2025 140 0 89.3%
April 2025 65 2 84.6%
March 2025 166 1 75.9%
February 2025 135 0 73.3%
January 2025 159 0 71.1%
December 2024 173 0 76.3%
November 2024 68 0 91.2%
October 2024 109 0 82.6%

How to read this chart

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