Aviation Data
EN
EnglishTiếng Việt

2,816 km · Domestic

Boston Logan (BOS) – Denver (DEN)

In July 2026, 769 flights operated between Boston Logan and Denver (both directions), and 65.5% 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
January549497▼ 9.5%
February499493▼ 1.2%
March626597▼ 4.6%
April590568▼ 3.7%
May683644▼ 5.7%
June765746▼ 2.5%
July844769▼ 8.9%
August790––
September663––
October684–in progress
November584––
December600––
Year to date (Jan–Jul)4,5564,314▼ 5.3%

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
January85.2%81.3%▼ 4.6%
February76.8%78.3%▲ 2.0%
March81.5%76.4%▼ 6.3%
April80.2%78.2%▼ 2.5%
May71.0%80.4%▲ 13.2%
June72.0%72.4%▲ 0.6%
July71.6%65.5%▼ 8.5%
August78.1%––
September61.4%––
October66.5%–in progress
November82.9%––
December78.3%––
Year-to-date average (Jan–Jul)76.9%76.1%▼ 1.1%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January122▲ 2,100.0%
February240▲ 1,900.0%
March03–
April00–
May02–
June12▲ 100.0%
July1023▲ 130.0%
August4––
September3––
October1–in progress
November1––
December4––
Year to date (Jan–Jul)1492▲ 557.1%

Airlines on this route

  1. United Airlines 49.9%
  2. Southwest Airlines 23.2%
  3. JetBlue Airways 16.8%
  4. Delta Air Lines 10.1%

Oct 1, 2024 – Jul 31, 2026

By direction

BOS → DEN

Scheduled flights
7,021
Flights operated
6,958
Cancelled
63 · 0.9%
On-time departures
79.8%

DEN → BOS

Scheduled flights
6,973
Flights operated
6,911
Cancelled
62 · 0.9%
On-time departures
72.5%

BOS → DEN and DEN → BOS counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
United Airlines UA 6,977 49.9% 82.6% 42
Southwest Airlines WN 3,246 23.2% 64.9% 22
JetBlue Airways B6 2,351 16.8% 70.4% 46
Delta Air Lines DL 1,420 10.1% 79.2% 15

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 delay06:00–07:00-0.0min · 446 recorded · 438 measured
Gap to highest-delay hour35.3min06:00 ↔ 18:00
Recorded flights13,994BOS–DEN

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · Fewer than 200 measured departures · 4 recorded · 4 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 · 92.9% · 267 recorded · 267 measured · Source: the US BTS 06:00 · 94.5% · 446 recorded · 438 measured · Source: the US BTS 07:00 · 91.8% · 1,692 recorded · 1,676 measured · Source: the US BTS 08:00 · 90.8% · 505 recorded · 501 measured · Source: the US BTS 09:00 · 84.0% · 1,574 recorded · 1,560 measured · Source: the US BTS 10:00 · 75.6% · 536 recorded · 532 measured · Source: the US BTS 11:00 · 78.9% · 1,527 recorded · 1,515 measured · Source: the US BTS 12:00 · 68.2% · 244 recorded · 242 measured · Source: the US BTS 13:00 · 70.8% · 883 recorded · 872 measured · Source: the US BTS 14:00 · 65.3% · 629 recorded · 623 measured · Source: the US BTS 15:00 · 78.5% · 935 recorded · 927 measured · Source: the US BTS 16:00 · 69.0% · 1,045 recorded · 1,037 measured · Source: the US BTS 17:00 · 63.3% · 1,127 recorded · 1,120 measured · Source: the US BTS 18:00 · 49.8% · 518 recorded · 514 measured · Source: the US BTS 19:00 · 47.9% · 513 recorded · 505 measured · Source: the US BTS 20:00 · 67.7% · 423 recorded · 421 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 33 recorded · 33 measured · Source: the US BTS 22:00 · 63.6% · 219 recorded · 217 measured · Source: the US BTS 23:00 · 81.6% · 874 recorded · 865 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 · Fewer than 200 measured departures · 4 recorded · 4 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 · 3.1 min · 267 recorded · 267 measured · Source: the US BTS 06:00 · -0.0 min · 446 recorded · 438 measured · Source: the US BTS 07:00 · 0.7 min · 1,692 recorded · 1,676 measured · Source: the US BTS 08:00 · 2.6 min · 505 recorded · 501 measured · Source: the US BTS 09:00 · 9.0 min · 1,574 recorded · 1,560 measured · Source: the US BTS 10:00 · 14.6 min · 536 recorded · 532 measured · Source: the US BTS 11:00 · 10.5 min · 1,527 recorded · 1,515 measured · Source: the US BTS 12:00 · 18.7 min · 244 recorded · 242 measured · Source: the US BTS 13:00 · 23.5 min · 883 recorded · 872 measured · Source: the US BTS 14:00 · 27.6 min · 629 recorded · 623 measured · Source: the US BTS 15:00 · 14.9 min · 935 recorded · 927 measured · Source: the US BTS 16:00 · 21.4 min · 1,045 recorded · 1,037 measured · Source: the US BTS 17:00 · 26.2 min · 1,127 recorded · 1,120 measured · Source: the US BTS 18:00 · 35.2 min · 518 recorded · 514 measured · Source: the US BTS 19:00 · 34.8 min · 513 recorded · 505 measured · Source: the US BTS 20:00 · 24.5 min · 423 recorded · 421 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 33 recorded · 33 measured · Source: the US BTS 22:00 · 22.9 min · 219 recorded · 217 measured · Source: the US BTS 23:00 · 9.3 min · 874 recorded · 865 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 · 4 · 4 recorded · 4 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 · 267 · 267 recorded · 267 measured · Source: the US BTS 06:00 · 446 · 446 recorded · 438 measured · Source: the US BTS 07:00 · 1,692 · 1,692 recorded · 1,676 measured · Source: the US BTS 08:00 · 505 · 505 recorded · 501 measured · Source: the US BTS 09:00 · 1,574 · 1,574 recorded · 1,560 measured · Source: the US BTS 10:00 · 536 · 536 recorded · 532 measured · Source: the US BTS 11:00 · 1,527 · 1,527 recorded · 1,515 measured · Source: the US BTS 12:00 · 244 · 244 recorded · 242 measured · Source: the US BTS 13:00 · 883 · 883 recorded · 872 measured · Source: the US BTS 14:00 · 629 · 629 recorded · 623 measured · Source: the US BTS 15:00 · 935 · 935 recorded · 927 measured · Source: the US BTS 16:00 · 1,045 · 1,045 recorded · 1,037 measured · Source: the US BTS 17:00 · 1,127 · 1,127 recorded · 1,120 measured · Source: the US BTS 18:00 · 518 · 518 recorded · 514 measured · Source: the US BTS 19:00 · 513 · 513 recorded · 505 measured · Source: the US BTS 20:00 · 423 · 423 recorded · 421 measured · Source: the US BTS 21:00 · 33 · 33 recorded · 33 measured · Source: the US BTS 22:00 · 219 · 219 recorded · 217 measured · Source: the US BTS 23:00 · 874 · 874 recorded · 865 measured · Source: the US BTS

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

View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00Fewer than 200 measured departures—44
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:0092.9%3.1 min267267
06:0094.5%-0.0 min438446
07:0091.8%0.7 min1,6761,692
08:0090.8%2.6 min501505
09:0084.0%9.0 min1,5601,574
10:0075.6%14.6 min532536
11:0078.9%10.5 min1,5151,527
12:0068.2%18.7 min242244
13:0070.8%23.5 min872883
14:0065.3%27.6 min623629
15:0078.5%14.9 min927935
16:0069.0%21.4 min1,0371,045
17:0063.3%26.2 min1,1201,127
18:0049.8%35.2 min514518
19:0047.9%34.8 min505513
20:0067.7%24.5 min421423
21:00Fewer than 200 measured departures—3333
22:0063.6%22.9 min217219
23:0081.6%9.3 min865874

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 76.5% · 2,106 recorded · 2,068 measured · Source: the US BTS Tuesday · 75.8% · 1,859 recorded · 1,838 measured · Source: the US BTS Wednesday · 78.5% · 1,971 recorded · 1,966 measured · Source: the US BTS Thursday · 72.9% · 2,100 recorded · 2,093 measured · Source: the US BTS Friday · 75.0% · 2,128 recorded · 2,115 measured · Source: the US BTS Saturday · 79.2% · 1,730 recorded · 1,720 measured · Source: the US BTS Sunday · 75.6% · 2,100 recorded · 2,069 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 · 14.6 min · 2,106 recorded · 2,068 measured · Source: the US BTS Tuesday · 14.9 min · 1,859 recorded · 1,838 measured · Source: the US BTS Wednesday · 13.7 min · 1,971 recorded · 1,966 measured · Source: the US BTS Thursday · 19.0 min · 2,100 recorded · 2,093 measured · Source: the US BTS Friday · 17.0 min · 2,128 recorded · 2,115 measured · Source: the US BTS Saturday · 11.1 min · 1,730 recorded · 1,720 measured · Source: the US BTS Sunday · 13.9 min · 2,100 recorded · 2,069 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 · 2,106 · 2,106 recorded · 2,068 measured · Source: the US BTS Tuesday · 1,859 · 1,859 recorded · 1,838 measured · Source: the US BTS Wednesday · 1,971 · 1,971 recorded · 1,966 measured · Source: the US BTS Thursday · 2,100 · 2,100 recorded · 2,093 measured · Source: the US BTS Friday · 2,128 · 2,128 recorded · 2,115 measured · Source: the US BTS Saturday · 1,730 · 1,730 recorded · 1,720 measured · Source: the US BTS Sunday · 2,100 · 2,100 recorded · 2,069 measured · Source: the US BTS

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

View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday76.5%14.6 min2,0682,106
Tuesday75.8%14.9 min1,8381,859
Wednesday78.5%13.7 min1,9661,971
Thursday72.9%19.0 min2,0932,100
Friday75.0%17.0 min2,1152,128
Saturday79.2%11.1 min1,7201,730
Sunday75.6%13.9 min2,0692,100

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 · 83.4% · 1,069 recorded · 1,046 measured · Source: the US BTS Feb · 77.5% · 1,034 recorded · 992 measured · Source: the US BTS Mar · 79.0% · 1,226 recorded · 1,223 measured · Source: the US BTS Apr · 79.2% · 1,158 recorded · 1,158 measured · Source: the US BTS May · 75.6% · 1,329 recorded · 1,327 measured · Source: the US BTS Jun · 72.2% · 1,514 recorded · 1,511 measured · Source: the US BTS Jul · 68.7% · 1,646 recorded · 1,613 measured · Source: the US BTS Aug · 78.1% · 794 recorded · 790 measured · Source: the US BTS Sep · 61.4% · 666 recorded · 663 measured · Source: the US BTS Oct · 75.3% · 1,141 recorded · 1,140 measured · Source: the US BTS Nov · 82.5% · 1,206 recorded · 1,203 measured · Source: the US BTS Dec · 79.6% · 1,211 recorded · 1,203 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 · 8.3 min · 1,069 recorded · 1,046 measured · Source: the US BTS Feb · 13.7 min · 1,034 recorded · 992 measured · Source: the US BTS Mar · 12.3 min · 1,226 recorded · 1,223 measured · Source: the US BTS Apr · 9.1 min · 1,158 recorded · 1,158 measured · Source: the US BTS May · 13.8 min · 1,329 recorded · 1,327 measured · Source: the US BTS Jun · 18.0 min · 1,514 recorded · 1,511 measured · Source: the US BTS Jul · 23.5 min · 1,646 recorded · 1,613 measured · Source: the US BTS Aug · 13.3 min · 794 recorded · 790 measured · Source: the US BTS Sep · 29.3 min · 666 recorded · 663 measured · Source: the US BTS Oct · 16.3 min · 1,141 recorded · 1,140 measured · Source: the US BTS Nov · 9.2 min · 1,206 recorded · 1,203 measured · Source: the US BTS Dec · 14.5 min · 1,211 recorded · 1,203 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 · 1,069 · 1,069 recorded · 1,046 measured · Source: the US BTS Feb · 1,034 · 1,034 recorded · 992 measured · Source: the US BTS Mar · 1,226 · 1,226 recorded · 1,223 measured · Source: the US BTS Apr · 1,158 · 1,158 recorded · 1,158 measured · Source: the US BTS May · 1,329 · 1,329 recorded · 1,327 measured · Source: the US BTS Jun · 1,514 · 1,514 recorded · 1,511 measured · Source: the US BTS Jul · 1,646 · 1,646 recorded · 1,613 measured · Source: the US BTS Aug · 794 · 794 recorded · 790 measured · Source: the US BTS Sep · 666 · 666 recorded · 663 measured · Source: the US BTS Oct · 1,141 · 1,141 recorded · 1,140 measured · Source: the US BTS Nov · 1,206 · 1,206 recorded · 1,203 measured · Source: the US BTS Dec · 1,211 · 1,211 recorded · 1,203 measured · Source: the US BTS

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

View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan83.4%8.3 min1,0461,069
Feb77.5%13.7 min9921,034
Mar79.0%12.3 min1,2231,226
Apr79.2%9.1 min1,1581,158
May75.6%13.8 min1,3271,329
Jun72.2%18.0 min1,5111,514
Jul68.7%23.5 min1,6131,646
Aug78.1%13.3 min790794
Sep61.4%29.3 min663666
Oct75.3%16.3 min1,1401,141
Nov82.5%9.2 min1,2031,206
Dec79.6%14.5 min1,2031,211

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% 10,559
  • Delayed >15 min 23.7% 3,310
  • Cancelled 0.9% 125
  • 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

94
94 of 94
Flight numbersBy direction DeparturesOn time
DL499 BOS → DEN 658 87.4%
UA647 BOS → DEN 655 94.4%
UA414 BOS → DEN 644 88.9%
DL499 DEN → BOS 628 74.8%
B66394 DEN → BOS 586 68.2%
UA662 BOS → DEN 551 90.9%
UA558 DEN → BOS 540 93.5%
B66393 BOS → DEN 535 80.8%
UA800 BOS → DEN 490 79.4%
UA597 DEN → BOS 415 72.0%
UA2297 BOS → DEN 399 89.7%
B66993 BOS → DEN 376 60.0%
B66994 DEN → BOS 376 62.8%
UA2461 DEN → BOS 336 82.7%
UA2610 DEN → BOS 282 90.1%
UA1232 DEN → BOS 205 88.2%
UA1356 DEN → BOS 185 73.5%
UA2413 BOS → DEN 184 62.3%
UA1027 DEN → BOS 182 65.4%
UA1510 DEN → BOS 168 80.8%
UA2656 DEN → BOS 159 94.9%
B66493 BOS → DEN 152 92.4%
B66494 DEN → BOS 152 70.3%
WN1304 BOS → DEN 118 89.0%
UA778 BOS → DEN 114 86.8%
WN4234 DEN → BOS 111 70.9%
UA716 DEN → BOS 99 68.4%
UA779 DEN → BOS 82 70.7%
WN2437 DEN → BOS 81 55.6%
UA2433 BOS → DEN 69 54.4%
UA361 DEN → BOS 65 92.3%
WN1427 BOS → DEN 64 87.5%
WN323 DEN → BOS 64 77.8%
WN1029 BOS → DEN 61 39.3%
WN3499 DEN → BOS 61 55.7%
WN1428 BOS → DEN 60 75.0%
WN1120 BOS → DEN 58 93.1%
WN2329 DEN → BOS 58 44.8%
WN3019 DEN → BOS 58 51.7%
WN3704 DEN → BOS 58 44.8%
WN3705 BOS → DEN 58 96.6%
WN4156 BOS → DEN 58 93.1%
WN378 DEN → BOS 57 17.5%
UA503 DEN → BOS 54 59.3%
UA1587 DEN → BOS 52 80.8%
B66793 BOS → DEN 51 64.0%
WN814 BOS → DEN 51 72.6%
DL2199 BOS → DEN 50 59.2%
DL719 DEN → BOS 50 63.3%
WN1494 DEN → BOS 50 2.0%
WN164 DEN → BOS 50 84.0%
WN1797 DEN → BOS 50 64.0%
WN3535 BOS → DEN 50 82.0%
WN735 DEN → BOS 50 40.0%
B662393 BOS → DEN 49 75.0%
WN1363 BOS → DEN 47 93.3%
WN2121 DEN → BOS 47 64.4%
WN1365 DEN → BOS 42 66.7%
WN3182 BOS → DEN 42 62.5%
WN3729 BOS → DEN 42 23.8%
WN737 DEN → BOS 42 90.0%
WN742 BOS → DEN 42 19.1%
WN2508 BOS → DEN 41 92.7%
WN3690 DEN → BOS 41 87.8%
WN954 BOS → DEN 41 85.4%
WN354 BOS → DEN 40 75.0%
UA1691 DEN → BOS 37 64.9%
UA260 DEN → BOS 37 83.8%
UA645 DEN → BOS 37 35.1%
UA1292 DEN → BOS 36 55.6%
WN3244 DEN → BOS 36 30.6%
UA1218 DEN → BOS 35 62.9%
UA702 BOS → DEN 35 77.1%
B662294 DEN → BOS 34 63.6%
UA2798 DEN → BOS 34 57.6%
WN1257 BOS → DEN 33 97.0%
WN1658 BOS → DEN 33 72.7%
WN2462 DEN → BOS 33 48.5%
WN2673 DEN → BOS 33 57.6%
WN4129 DEN → BOS 33 66.7%
WN4208 BOS → DEN 33 57.6%
WN668 BOS → DEN 33 97.0%
UA369 DEN → BOS 32 84.4%
UA497 BOS → DEN 32 90.6%
UA642 DEN → BOS 32 93.8%
WN892 BOS → DEN 32 43.8%
UA1476 BOS → DEN 31 45.2%
UA1488 DEN → BOS 31 83.9%
UA567 DEN → BOS 31 41.9%
WN3908 BOS → DEN 31 23.3%
DL2537 DEN → BOS 30 50.0%
UA202 BOS → DEN 30 53.3%
UA2132 BOS → DEN 30 86.7%
WN3279 BOS → DEN 30 73.3%

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 769 −8.9% 23 65.5%
June 2026 746 −2.5% 2 72.4%
May 2026 644 −5.7% 2 80.4%
April 2026 568 −3.7% 0 78.2%
March 2026 597 −4.6% 3 76.4%
February 2026 493 −1.2% 40 78.3%
January 2026 497 −9.5% 22 81.3%
December 2025 600 −0.5% 4 78.3%
November 2025 584 −5.7% 1 82.9%
October 2025 684 +50.0% 1 66.5%
September 2025 663 3 61.4%
August 2025 790 4 78.1%
July 2025 844 10 71.6%
June 2025 765 1 72.0%
May 2025 683 0 71.0%
April 2025 590 0 80.2%
March 2025 626 0 81.5%
February 2025 499 2 76.8%
January 2025 549 1 85.2%
December 2024 603 4 80.9%
November 2024 619 2 82.2%
October 2024 456 0 88.4%

How to read this chart

Loading the guide…