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1,391 km · Domestic

Boston Logan (BOS) – Chicago O'Hare (ORD)

In July 2026, 1,496 flights operated between Boston Logan and Chicago O'Hare (both directions), and 70.7% 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
January966937▼ 3.0%
February917935▲ 2.0%
March1,1311,126▼ 0.4%
April1,0731,254▲ 16.9%
May1,2821,473▲ 14.9%
June1,3311,460▲ 9.7%
July1,3051,496▲ 14.6%
August1,338––
September1,312––
October1,378–in progress
November1,222––
December1,104––
Year to date (Jan–Jul)8,0058,681▲ 8.4%

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
January86.4%75.7%▼ 12.4%
February82.8%81.9%▼ 1.1%
March83.3%73.1%▼ 12.2%
April83.9%75.0%▼ 10.6%
May73.9%79.4%▲ 7.4%
June74.5%74.5%0.0%
July68.7%70.7%▲ 2.9%
August73.8%––
September64.3%––
October65.9%–in progress
November75.4%––
December71.6%––
Year-to-date average (Jan–Jul)79.1%75.8%▼ 4.2%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January763▲ 800.0%
February1670▲ 337.5%
March969▲ 666.7%
April1328▲ 115.4%
May95▼ 44.4%
June841▲ 412.5%
July4176▲ 85.4%
August30––
September8––
October12–in progress
November59––
December9––
Year to date (Jan–Jul)103352▲ 241.7%

Airlines on this route

  1. United Airlines 35.3%
  2. American Airlines 25.1%
  3. Delta Air Lines 12.5%
  4. Republic Airways 12.3%
  5. JetBlue Airways 7.7%
  6. Envoy Air 6.8%

Oct 1, 2024 – Jul 31, 2026

By direction

BOS → ORD

Scheduled flights
13,289
Flights operated
12,997
Cancelled
292 · 2.2%
On-time departures
79.4%

ORD → BOS

Scheduled flights
13,293
Flights operated
13,009
Cancelled
284 · 2.1%
On-time departures
73.0%

BOS → ORD and ORD → BOS counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
United Airlines UA 9,384 35.3% 79.6% 128
American Airlines AA 6,678 25.1% 70.2% 157
Delta Air Lines DL 3,326 12.5% 73.2% 82
Republic Airways YX 3,258 12.3% 77.7% 130
JetBlue Airways B6 2,055 7.7% 76.0% 43
Envoy Air MQ 1,809 6.8% 83.6% 36
Spirit Airlines NK 72 0.3% 84.7% 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 delay06:00–07:00-1.0min · 2,073 recorded · 2,041 measured
Gap to highest-delay hour40.2min06:00 ↔ 20:00
Recorded flights26,582BOS–ORD

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 · 3 recorded · 3 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 · 91.6% · 365 recorded · 359 measured · Source: the US BTS 06:00 · 94.5% · 2,073 recorded · 2,041 measured · Source: the US BTS 07:00 · 91.0% · 3,127 recorded · 3,068 measured · Source: the US BTS 08:00 · 87.4% · 1,509 recorded · 1,495 measured · Source: the US BTS 09:00 · 86.4% · 1,634 recorded · 1,619 measured · Source: the US BTS 10:00 · 81.9% · 1,756 recorded · 1,727 measured · Source: the US BTS 11:00 · 78.6% · 1,666 recorded · 1,645 measured · Source: the US BTS 12:00 · 82.1% · 1,635 recorded · 1,611 measured · Source: the US BTS 13:00 · 69.6% · 1,561 recorded · 1,533 measured · Source: the US BTS 14:00 · 72.5% · 1,119 recorded · 1,099 measured · Source: the US BTS 15:00 · 63.4% · 1,882 recorded · 1,842 measured · Source: the US BTS 16:00 · 70.3% · 1,800 recorded · 1,744 measured · Source: the US BTS 17:00 · 61.6% · 1,380 recorded · 1,330 measured · Source: the US BTS 18:00 · 66.8% · 1,759 recorded · 1,715 measured · Source: the US BTS 19:00 · 56.6% · 1,567 recorded · 1,503 measured · Source: the US BTS 20:00 · 56.1% · 1,374 recorded · 1,309 measured · Source: the US BTS 21:00 · 63.4% · 370 recorded · 361 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 2 recorded · 2 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 · 3 recorded · 3 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 · 3.6 min · 365 recorded · 359 measured · Source: the US BTS 06:00 · -1.0 min · 2,073 recorded · 2,041 measured · Source: the US BTS 07:00 · 2.5 min · 3,127 recorded · 3,068 measured · Source: the US BTS 08:00 · 4.8 min · 1,509 recorded · 1,495 measured · Source: the US BTS 09:00 · 6.0 min · 1,634 recorded · 1,619 measured · Source: the US BTS 10:00 · 11.0 min · 1,756 recorded · 1,727 measured · Source: the US BTS 11:00 · 14.3 min · 1,666 recorded · 1,645 measured · Source: the US BTS 12:00 · 12.3 min · 1,635 recorded · 1,611 measured · Source: the US BTS 13:00 · 23.1 min · 1,561 recorded · 1,533 measured · Source: the US BTS 14:00 · 18.2 min · 1,119 recorded · 1,099 measured · Source: the US BTS 15:00 · 32.6 min · 1,882 recorded · 1,842 measured · Source: the US BTS 16:00 · 23.8 min · 1,800 recorded · 1,744 measured · Source: the US BTS 17:00 · 30.1 min · 1,380 recorded · 1,330 measured · Source: the US BTS 18:00 · 27.2 min · 1,759 recorded · 1,715 measured · Source: the US BTS 19:00 · 37.0 min · 1,567 recorded · 1,503 measured · Source: the US BTS 20:00 · 39.2 min · 1,374 recorded · 1,309 measured · Source: the US BTS 21:00 · 26.6 min · 370 recorded · 361 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 2 recorded · 2 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 · 3 · 3 recorded · 3 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 · 365 · 365 recorded · 359 measured · Source: the US BTS 06:00 · 2,073 · 2,073 recorded · 2,041 measured · Source: the US BTS 07:00 · 3,127 · 3,127 recorded · 3,068 measured · Source: the US BTS 08:00 · 1,509 · 1,509 recorded · 1,495 measured · Source: the US BTS 09:00 · 1,634 · 1,634 recorded · 1,619 measured · Source: the US BTS 10:00 · 1,756 · 1,756 recorded · 1,727 measured · Source: the US BTS 11:00 · 1,666 · 1,666 recorded · 1,645 measured · Source: the US BTS 12:00 · 1,635 · 1,635 recorded · 1,611 measured · Source: the US BTS 13:00 · 1,561 · 1,561 recorded · 1,533 measured · Source: the US BTS 14:00 · 1,119 · 1,119 recorded · 1,099 measured · Source: the US BTS 15:00 · 1,882 · 1,882 recorded · 1,842 measured · Source: the US BTS 16:00 · 1,800 · 1,800 recorded · 1,744 measured · Source: the US BTS 17:00 · 1,380 · 1,380 recorded · 1,330 measured · Source: the US BTS 18:00 · 1,759 · 1,759 recorded · 1,715 measured · Source: the US BTS 19:00 · 1,567 · 1,567 recorded · 1,503 measured · Source: the US BTS 20:00 · 1,374 · 1,374 recorded · 1,309 measured · Source: the US BTS 21:00 · 370 · 370 recorded · 361 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · 2 · 2 recorded · 2 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00Fewer than 200 measured departures—33
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:0091.6%3.6 min359365
06:0094.5%-1.0 min2,0412,073
07:0091.0%2.5 min3,0683,127
08:0087.4%4.8 min1,4951,509
09:0086.4%6.0 min1,6191,634
10:0081.9%11.0 min1,7271,756
11:0078.6%14.3 min1,6451,666
12:0082.1%12.3 min1,6111,635
13:0069.6%23.1 min1,5331,561
14:0072.5%18.2 min1,0991,119
15:0063.4%32.6 min1,8421,882
16:0070.3%23.8 min1,7441,800
17:0061.6%30.1 min1,3301,380
18:0066.8%27.2 min1,7151,759
19:0056.6%37.0 min1,5031,567
20:0056.1%39.2 min1,3091,374
21:0063.4%26.6 min361370
22:00No observations———
23:00Fewer than 200 measured departures—22

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 74.2% · 4,064 recorded · 3,908 measured · Source: the US BTS Tuesday · 79.3% · 3,640 recorded · 3,559 measured · Source: the US BTS Wednesday · 78.9% · 3,646 recorded · 3,587 measured · Source: the US BTS Thursday · 74.8% · 3,994 recorded · 3,916 measured · Source: the US BTS Friday · 74.8% · 4,028 recorded · 3,971 measured · Source: the US BTS Saturday · 78.8% · 3,188 recorded · 3,148 measured · Source: the US BTS Sunday · 73.7% · 4,022 recorded · 3,917 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 · 20.0 min · 4,064 recorded · 3,908 measured · Source: the US BTS Tuesday · 14.2 min · 3,640 recorded · 3,559 measured · Source: the US BTS Wednesday · 14.0 min · 3,646 recorded · 3,587 measured · Source: the US BTS Thursday · 18.9 min · 3,994 recorded · 3,916 measured · Source: the US BTS Friday · 17.6 min · 4,028 recorded · 3,971 measured · Source: the US BTS Saturday · 15.4 min · 3,188 recorded · 3,148 measured · Source: the US BTS Sunday · 19.3 min · 4,022 recorded · 3,917 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 · 4,064 · 4,064 recorded · 3,908 measured · Source: the US BTS Tuesday · 3,640 · 3,640 recorded · 3,559 measured · Source: the US BTS Wednesday · 3,646 · 3,646 recorded · 3,587 measured · Source: the US BTS Thursday · 3,994 · 3,994 recorded · 3,916 measured · Source: the US BTS Friday · 4,028 · 4,028 recorded · 3,971 measured · Source: the US BTS Saturday · 3,188 · 3,188 recorded · 3,148 measured · Source: the US BTS Sunday · 4,022 · 4,022 recorded · 3,917 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday74.2%20.0 min3,9084,064
Tuesday79.3%14.2 min3,5593,640
Wednesday78.9%14.0 min3,5873,646
Thursday74.8%18.9 min3,9163,994
Friday74.8%17.6 min3,9714,028
Saturday78.8%15.4 min3,1483,188
Sunday73.7%19.3 min3,9174,022

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 · 81.1% · 1,973 recorded · 1,903 measured · Source: the US BTS Feb · 82.3% · 1,938 recorded · 1,852 measured · Source: the US BTS Mar · 78.2% · 2,335 recorded · 2,257 measured · Source: the US BTS Apr · 79.1% · 2,368 recorded · 2,327 measured · Source: the US BTS May · 76.9% · 2,769 recorded · 2,755 measured · Source: the US BTS Jun · 74.5% · 2,840 recorded · 2,791 measured · Source: the US BTS Jul · 69.7% · 2,918 recorded · 2,801 measured · Source: the US BTS Aug · 73.8% · 1,368 recorded · 1,338 measured · Source: the US BTS Sep · 64.3% · 1,320 recorded · 1,312 measured · Source: the US BTS Oct · 73.4% · 2,192 recorded · 2,180 measured · Source: the US BTS Nov · 81.6% · 2,440 recorded · 2,381 measured · Source: the US BTS Dec · 76.9% · 2,121 recorded · 2,109 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 · 11.5 min · 1,973 recorded · 1,903 measured · Source: the US BTS Feb · 9.6 min · 1,938 recorded · 1,852 measured · Source: the US BTS Mar · 16.2 min · 2,335 recorded · 2,257 measured · Source: the US BTS Apr · 12.7 min · 2,368 recorded · 2,327 measured · Source: the US BTS May · 16.1 min · 2,769 recorded · 2,755 measured · Source: the US BTS Jun · 21.4 min · 2,840 recorded · 2,791 measured · Source: the US BTS Jul · 25.8 min · 2,918 recorded · 2,801 measured · Source: the US BTS Aug · 17.2 min · 1,368 recorded · 1,338 measured · Source: the US BTS Sep · 27.1 min · 1,320 recorded · 1,312 measured · Source: the US BTS Oct · 17.9 min · 2,192 recorded · 2,180 measured · Source: the US BTS Nov · 12.6 min · 2,440 recorded · 2,381 measured · Source: the US BTS Dec · 17.5 min · 2,121 recorded · 2,109 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 · 1,973 · 1,973 recorded · 1,903 measured · Source: the US BTS Feb · 1,938 · 1,938 recorded · 1,852 measured · Source: the US BTS Mar · 2,335 · 2,335 recorded · 2,257 measured · Source: the US BTS Apr · 2,368 · 2,368 recorded · 2,327 measured · Source: the US BTS May · 2,769 · 2,769 recorded · 2,755 measured · Source: the US BTS Jun · 2,840 · 2,840 recorded · 2,791 measured · Source: the US BTS Jul · 2,918 · 2,918 recorded · 2,801 measured · Source: the US BTS Aug · 1,368 · 1,368 recorded · 1,338 measured · Source: the US BTS Sep · 1,320 · 1,320 recorded · 1,312 measured · Source: the US BTS Oct · 2,192 · 2,192 recorded · 2,180 measured · Source: the US BTS Nov · 2,440 · 2,440 recorded · 2,381 measured · Source: the US BTS Dec · 2,121 · 2,121 recorded · 2,109 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan81.1%11.5 min1,9031,973
Feb82.3%9.6 min1,8521,938
Mar78.2%16.2 min2,2572,335
Apr79.1%12.7 min2,3272,368
May76.9%16.1 min2,7552,769
Jun74.5%21.4 min2,7912,840
Jul69.7%25.8 min2,8012,918
Aug73.8%17.2 min1,3381,368
Sep64.3%27.1 min1,3121,320
Oct73.4%17.9 min2,1802,192
Nov81.6%12.6 min2,3812,440
Dec76.9%17.5 min2,1092,121

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 74.6% 19,821
  • Delayed >15 min 23.3% 6,185
  • Cancelled 2.2% 576
  • 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

219
219 of 219
Flight numbersBy direction DeparturesOn time
UA2040 BOS → ORD 631 84.2%
UA1414 BOS → ORD 623 97.1%
B66312 ORD → BOS 610 81.7%
UA1732 BOS → ORD 600 90.6%
B66311 BOS → ORD 561 87.6%
DL2570 BOS → ORD 466 87.9%
UA1015 BOS → ORD 463 62.1%
UA399 ORD → BOS 461 75.6%
AA1509 BOS → ORD 456 94.3%
DL2646 BOS → ORD 442 67.2%
UA1989 ORD → BOS 407 66.3%
UA2067 ORD → BOS 370 94.8%
DL2570 ORD → BOS 345 77.9%
B66811 BOS → ORD 332 56.3%
UA1693 ORD → BOS 309 68.4%
MQ3711 BOS → ORD 306 77.1%
DL2646 ORD → BOS 302 60.8%
B661012 ORD → BOS 294 60.4%
AA3107 ORD → BOS 287 50.0%
AA1239 BOS → ORD 282 92.1%
DL2676 BOS → ORD 281 53.1%
UA1349 BOS → ORD 277 91.9%
DL2679 BOS → ORD 265 81.0%
UA580 ORD → BOS 257 78.5%
AA2682 ORD → BOS 233 48.7%
UA1779 ORD → BOS 224 63.4%
UA1677 ORD → BOS 218 52.1%
MQ3710 ORD → BOS 204 87.3%
UA378 BOS → ORD 198 92.4%
AA2837 ORD → BOS 194 63.7%
DL1602 ORD → BOS 194 85.9%
AA3324 BOS → ORD 185 92.8%
AA1457 ORD → BOS 182 67.2%
UA2229 BOS → ORD 176 47.4%
AA2837 BOS → ORD 175 54.2%
AA1461 ORD → BOS 174 48.8%
UA2104 ORD → BOS 163 94.5%
DL972 ORD → BOS 147 53.8%
AA3160 ORD → BOS 142 54.0%
MQ3703 ORD → BOS 137 93.4%
UA503 BOS → ORD 135 87.4%
MQ4106 ORD → BOS 134 91.0%
AA1328 BOS → ORD 125 94.0%
DL2956 ORD → BOS 123 92.7%
YX5591 BOS → ORD 123 83.6%
AA1033 ORD → BOS 120 59.5%
UA1606 ORD → BOS 117 84.5%
UA1117 ORD → BOS 115 82.6%
YX4384 ORD → BOS 115 69.4%
B66611 BOS → ORD 113 79.7%
B66612 ORD → BOS 112 81.3%
AA547 ORD → BOS 111 75.7%
DL2828 ORD → BOS 110 90.3%
DL2804 BOS → ORD 109 49.0%
YX4650 ORD → BOS 105 66.0%
AA514 BOS → ORD 104 85.4%
YX4413 BOS → ORD 102 73.7%
UA2466 ORD → BOS 101 53.5%
YX4486 BOS → ORD 101 88.1%
YX5633 ORD → BOS 98 89.3%
AA314 ORD → BOS 97 88.7%
AA3233 BOS → ORD 97 36.6%
YX5590 BOS → ORD 97 83.2%
YX5591 ORD → BOS 96 77.2%
YX5593 BOS → ORD 95 75.3%
UA721 ORD → BOS 93 88.2%
AA407 ORD → BOS 92 69.2%
UA2331 ORD → BOS 92 62.2%
DL2816 ORD → BOS 91 65.9%
DL2816 BOS → ORD 91 86.4%
AA630 ORD → BOS 89 79.8%
AA3309 BOS → ORD 88 77.0%
YX5596 BOS → ORD 88 85.2%
YX5858 BOS → ORD 85 73.7%
AA1479 ORD → BOS 82 72.8%
AA547 BOS → ORD 80 71.3%
DL2679 ORD → BOS 78 69.2%
AA1457 BOS → ORD 76 71.1%
AA2976 BOS → ORD 75 85.3%
AA3325 ORD → BOS 75 90.7%
DL416 ORD → BOS 74 50.7%
AA1554 BOS → ORD 72 56.7%
AA1554 ORD → BOS 72 44.9%
AA1563 ORD → BOS 72 57.8%
AA1592 BOS → ORD 72 39.4%
AA2968 ORD → BOS 72 83.1%
UA1076 ORD → BOS 72 93.1%
UA794 ORD → BOS 72 72.9%
YX4386 BOS → ORD 72 78.3%
AA1610 BOS → ORD 71 87.1%
AA2303 ORD → BOS 71 47.1%
AA3022 BOS → ORD 71 90.1%
MQ3600 ORD → BOS 69 88.2%
UA2454 ORD → BOS 69 94.2%
UA1262 ORD → BOS 67 58.5%
UA1834 BOS → ORD 66 90.9%
MQ3569 BOS → ORD 65 93.9%
MQ3821 ORD → BOS 65 95.4%
UA1314 BOS → ORD 64 89.1%
AA3022 ORD → BOS 63 93.7%
UA2099 ORD → BOS 63 85.7%
YX5597 ORD → BOS 62 95.2%
YX5651 ORD → BOS 62 87.1%
AA3201 ORD → BOS 61 76.3%
UA1186 ORD → BOS 61 95.1%
UA1301 BOS → ORD 61 69.5%
YX5607 BOS → ORD 60 78.2%
UA366 BOS → ORD 58 96.5%
UA2251 BOS → ORD 57 87.7%
YX4363 ORD → BOS 57 74.6%
YX4392 BOS → ORD 57 76.9%
UA1504 BOS → ORD 56 66.1%
UA1631 BOS → ORD 56 94.6%
YX5606 ORD → BOS 56 72.6%
UA1032 BOS → ORD 54 66.0%
UA2627 ORD → BOS 54 74.1%
YX4756 ORD → BOS 54 78.9%
UA1129 ORD → BOS 53 42.0%
YX5592 BOS → ORD 53 81.1%
YX5592 ORD → BOS 53 67.3%
UA1134 BOS → ORD 52 84.6%
UA1742 ORD → BOS 52 84.6%
YX5606 BOS → ORD 52 72.0%
AA1479 BOS → ORD 49 69.4%
YX5607 ORD → BOS 49 69.1%
UA1857 BOS → ORD 48 97.9%
UA267 BOS → ORD 47 83.0%
YX4628 BOS → ORD 47 64.3%
MQ3500 ORD → BOS 46 75.6%
AA469 ORD → BOS 45 69.1%
MQ3691 BOS → ORD 45 68.2%
AA1040 BOS → ORD 44 63.6%
AA2114 BOS → ORD 44 97.7%
AA2278 ORD → BOS 44 36.4%
AA2390 BOS → ORD 44 69.8%
AA2784 ORD → BOS 44 47.6%
AA2815 ORD → BOS 44 54.6%
AA2815 BOS → ORD 44 56.8%
AA2952 ORD → BOS 44 79.1%
AA3209 BOS → ORD 44 68.2%
AA3209 ORD → BOS 44 70.5%
AA488 BOS → ORD 44 86.4%
YX4404 ORD → BOS 44 75.0%
YX4616 ORD → BOS 44 95.5%
AA1009 BOS → ORD 43 72.1%
YX4618 BOS → ORD 43 85.7%
AA1485 ORD → BOS 42 61.9%
AA2877 ORD → BOS 42 76.2%
AA872 BOS → ORD 42 52.5%
YX4582 ORD → BOS 42 70.3%
UA1332 ORD → BOS 40 70.0%
UA1823 BOS → ORD 39 89.5%
AA3090 BOS → ORD 38 51.4%
YX5596 ORD → BOS 38 80.6%
MQ4157 BOS → ORD 37 69.4%
UA1083 ORD → BOS 37 91.9%
UA1475 BOS → ORD 37 70.3%
UA1531 ORD → BOS 37 54.1%
UA1989 BOS → ORD 37 70.3%
UA2022 ORD → BOS 37 38.9%
UA216 BOS → ORD 37 94.6%
UA222 BOS → ORD 37 91.7%
UA2631 BOS → ORD 37 97.1%
UA365 BOS → ORD 37 89.2%
UA519 BOS → ORD 37 89.2%
UA664 ORD → BOS 37 37.8%
YX4372 BOS → ORD 37 91.9%
YX4483 BOS → ORD 37 80.0%
NK174 BOS → ORD 36 94.4%
NK177 ORD → BOS 36 75.0%
UA1032 ORD → BOS 36 57.1%
UA2138 ORD → BOS 36 58.3%
UA2183 ORD → BOS 36 77.1%
UA546 BOS → ORD 36 97.2%
YX4545 BOS → ORD 36 76.5%
YX5638 ORD → BOS 36 97.2%
MQ3359 ORD → BOS 35 88.2%
UA1495 ORD → BOS 35 71.4%
UA1691 BOS → ORD 35 71.4%
AA2877 BOS → ORD 34 58.8%
AA598 BOS → ORD 34 90.9%
DL2391 ORD → BOS 34 91.2%
UA1800 ORD → BOS 34 60.6%
UA2444 ORD → BOS 34 44.1%
AA1905 BOS → ORD 33 72.7%
AA1913 BOS → ORD 33 31.3%
UA592 ORD → BOS 33 75.8%
YX4629 BOS → ORD 33 84.4%
YX5641 ORD → BOS 33 84.9%
AA2312 BOS → ORD 32 81.3%
AA2844 ORD → BOS 32 84.4%
DL1371 ORD → BOS 32 87.5%
DL2677 ORD → BOS 32 68.8%
MQ3780 BOS → ORD 32 81.3%
MQ3984 BOS → ORD 32 86.7%
UA1684 BOS → ORD 32 100.0%
UA1688 BOS → ORD 32 96.9%
UA1756 ORD → BOS 32 75.0%
UA1970 ORD → BOS 32 68.8%
UA285 BOS → ORD 32 87.5%
UA618 ORD → BOS 32 80.7%
AA1691 BOS → ORD 31 54.8%
UA1298 BOS → ORD 31 93.6%
UA536 ORD → BOS 31 83.9%
UA677 BOS → ORD 31 83.3%
UA691 ORD → BOS 31 74.2%
YX4400 ORD → BOS 31 71.0%
YX4796 ORD → BOS 31 74.2%
AA1245 BOS → ORD 30 77.8%
AA1443 ORD → BOS 30 69.0%
AA1563 BOS → ORD 30 51.7%
AA1905 ORD → BOS 30 86.7%
AA3010 BOS → ORD 30 58.6%
AA3090 ORD → BOS 30 51.7%
DL2519 ORD → BOS 30 93.3%
MQ3489 ORD → BOS 30 69.0%
MQ4131 BOS → ORD 30 80.0%
YX4358 ORD → BOS 30 79.3%
YX4606 ORD → BOS 30 85.7%

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 1,496 +14.6% 76 70.7%
June 2026 1,460 +9.7% 41 74.5%
May 2026 1,473 +14.9% 5 79.4%
April 2026 1,254 +16.9% 28 75.0%
March 2026 1,126 −0.4% 69 73.1%
February 2026 935 +2.0% 70 81.9%
January 2026 937 −3.0% 63 75.7%
December 2025 1,104 +9.9% 9 71.6%
November 2025 1,222 +5.4% 59 75.4%
October 2025 1,378 +71.8% 12 65.9%
September 2025 1,312 8 64.3%
August 2025 1,338 30 73.8%
July 2025 1,305 41 68.7%
June 2025 1,331 8 74.5%
May 2025 1,282 9 73.9%
April 2025 1,073 13 83.9%
March 2025 1,131 9 83.3%
February 2025 917 16 82.8%
January 2025 966 7 86.4%
December 2024 1,005 3 82.7%
November 2024 1,159 0 88.2%
October 2024 802 0 86.2%

How to read this chart

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