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945 km · Domestic

Washington Dulles (IAD) – Chicago O'Hare (ORD)

In July 2026, 420 flights operated between Washington Dulles and Chicago O'Hare (both directions), and 78.3% 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
January244250▲ 2.5%
February2242240.0%
March304290▼ 4.6%
April356362▲ 1.7%
May372433▲ 16.4%
June360418▲ 16.1%
July364420▲ 15.4%
August389––
September404––
October353–in progress
November296––
December291––
Year to date (Jan–Jul)2,2242,397▲ 7.8%

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
January84.4%83.2%▼ 1.4%
February86.2%86.6%▲ 0.5%
March85.9%77.9%▼ 9.3%
April86.8%82.6%▼ 4.8%
May81.5%85.0%▲ 4.3%
June76.7%85.9%▲ 12.0%
July67.6%78.3%▲ 15.8%
August81.0%––
September88.4%––
October83.6%–in progress
November79.7%––
December81.4%––
Year-to-date average (Jan–Jul)81.3%82.8%▲ 1.8%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January48▲ 100.0%
February00–
March06–
April40▼ 100.0%
May00–
June02–
July612▲ 100.0%
August3––
September0––
October0–in progress
November6––
December0––
Year to date (Jan–Jul)1428▲ 100.0%

By direction

IAD → ORD

Scheduled flights
3,581
Flights operated
3,553
Cancelled
28 · 0.8%
On-time departures
85.6%

ORD → IAD

Scheduled flights
3,579
Flights operated
3,555
Cancelled
24 · 0.7%
On-time departures
80.0%

IAD → ORD and ORD → IAD counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
United Airlines UA 7,160 100.0% 82.8% 52

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 delay06:00–07:00-3.8min · 561 recorded · 557 measured
Gap to highest-delay hour34.4min06:00 ↔ 17:00
Recorded flights7,160IAD–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 · 97.1% · 561 recorded · 557 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 14 recorded · 14 measured · Source: the US BTS 08:00 · 91.4% · 1,303 recorded · 1,297 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS 10:00 · 89.3% · 253 recorded · 252 measured · Source: the US BTS 11:00 · 90.0% · 210 recorded · 210 measured · Source: the US BTS 12:00 · 86.9% · 237 recorded · 236 measured · Source: the US BTS 13:00 · 84.1% · 1,079 recorded · 1,070 measured · Source: the US BTS 14:00 · 79.1% · 364 recorded · 363 measured · Source: the US BTS 15:00 · 82.1% · 444 recorded · 441 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 148 recorded · 147 measured · Source: the US BTS 17:00 · 69.6% · 888 recorded · 881 measured · Source: the US BTS 18:00 · 75.9% · 489 recorded · 485 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 6 recorded · 6 measured · Source: the US BTS 21:00 · 68.6% · 495 recorded · 490 measured · Source: the US BTS 22:00 · 83.4% · 658 recorded · 650 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 8 recorded · 6 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · -3.8 min · 561 recorded · 557 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 14 recorded · 14 measured · Source: the US BTS 08:00 · 4.2 min · 1,303 recorded · 1,297 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS 10:00 · 3.2 min · 253 recorded · 252 measured · Source: the US BTS 11:00 · 5.5 min · 210 recorded · 210 measured · Source: the US BTS 12:00 · 6.2 min · 237 recorded · 236 measured · Source: the US BTS 13:00 · 13.0 min · 1,079 recorded · 1,070 measured · Source: the US BTS 14:00 · 14.1 min · 364 recorded · 363 measured · Source: the US BTS 15:00 · 18.2 min · 444 recorded · 441 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 148 recorded · 147 measured · Source: the US BTS 17:00 · 30.5 min · 888 recorded · 881 measured · Source: the US BTS 18:00 · 17.7 min · 489 recorded · 485 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 6 recorded · 6 measured · Source: the US BTS 21:00 · 23.5 min · 495 recorded · 490 measured · Source: the US BTS 22:00 · 12.8 min · 658 recorded · 650 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 8 recorded · 6 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 · 561 · 561 recorded · 557 measured · Source: the US BTS 07:00 · 14 · 14 recorded · 14 measured · Source: the US BTS 08:00 · 1,303 · 1,303 recorded · 1,297 measured · Source: the US BTS 09:00 · 1 · 1 recorded · 1 measured · Source: the US BTS 10:00 · 253 · 253 recorded · 252 measured · Source: the US BTS 11:00 · 210 · 210 recorded · 210 measured · Source: the US BTS 12:00 · 237 · 237 recorded · 236 measured · Source: the US BTS 13:00 · 1,079 · 1,079 recorded · 1,070 measured · Source: the US BTS 14:00 · 364 · 364 recorded · 363 measured · Source: the US BTS 15:00 · 444 · 444 recorded · 441 measured · Source: the US BTS 16:00 · 148 · 148 recorded · 147 measured · Source: the US BTS 17:00 · 888 · 888 recorded · 881 measured · Source: the US BTS 18:00 · 489 · 489 recorded · 485 measured · Source: the US BTS 19:00 · 2 · 2 recorded · 2 measured · Source: the US BTS 20:00 · 6 · 6 recorded · 6 measured · Source: the US BTS 21:00 · 495 · 495 recorded · 490 measured · Source: the US BTS 22:00 · 658 · 658 recorded · 650 measured · Source: the US BTS 23:00 · 8 · 8 recorded · 6 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———
06:0097.1%-3.8 min557561
07:00Fewer than 200 measured departures—1414
08:0091.4%4.2 min1,2971,303
09:00Fewer than 200 measured departures—11
10:0089.3%3.2 min252253
11:0090.0%5.5 min210210
12:0086.9%6.2 min236237
13:0084.1%13.0 min1,0701,079
14:0079.1%14.1 min363364
15:0082.1%18.2 min441444
16:00Fewer than 200 measured departures—147148
17:0069.6%30.5 min881888
18:0075.9%17.7 min485489
19:00Fewer than 200 measured departures—22
20:00Fewer than 200 measured departures—66
21:0068.6%23.5 min490495
22:0083.4%12.8 min650658
23:00Fewer than 200 measured departures—68

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 83.0% · 1,026 recorded · 1,013 measured · Source: the US BTS Tuesday · 84.5% · 1,020 recorded · 1,012 measured · Source: the US BTS Wednesday · 82.6% · 1,020 recorded · 1,017 measured · Source: the US BTS Thursday · 83.3% · 1,021 recorded · 1,016 measured · Source: the US BTS Friday · 83.6% · 1,031 recorded · 1,027 measured · Source: the US BTS Saturday · 83.2% · 1,015 recorded · 1,007 measured · Source: the US BTS Sunday · 79.6% · 1,027 recorded · 1,016 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 · 14.1 min · 1,026 recorded · 1,013 measured · Source: the US BTS Tuesday · 11.7 min · 1,020 recorded · 1,012 measured · Source: the US BTS Wednesday · 12.3 min · 1,020 recorded · 1,017 measured · Source: the US BTS Thursday · 15.0 min · 1,021 recorded · 1,016 measured · Source: the US BTS Friday · 13.0 min · 1,031 recorded · 1,027 measured · Source: the US BTS Saturday · 12.9 min · 1,015 recorded · 1,007 measured · Source: the US BTS Sunday · 12.5 min · 1,027 recorded · 1,016 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 · 1,026 · 1,026 recorded · 1,013 measured · Source: the US BTS Tuesday · 1,020 · 1,020 recorded · 1,012 measured · Source: the US BTS Wednesday · 1,020 · 1,020 recorded · 1,017 measured · Source: the US BTS Thursday · 1,021 · 1,021 recorded · 1,016 measured · Source: the US BTS Friday · 1,031 · 1,031 recorded · 1,027 measured · Source: the US BTS Saturday · 1,015 · 1,015 recorded · 1,007 measured · Source: the US BTS Sunday · 1,027 · 1,027 recorded · 1,016 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday83.0%14.1 min1,0131,026
Tuesday84.5%11.7 min1,0121,020
Wednesday82.6%12.3 min1,0171,020
Thursday83.3%15.0 min1,0161,021
Friday83.6%13.0 min1,0271,031
Saturday83.2%12.9 min1,0071,015
Sunday79.6%12.5 min1,0161,027

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 · 83.8% · 506 recorded · 494 measured · Source: the US BTS Feb · 86.4% · 448 recorded · 448 measured · Source: the US BTS Mar · 82.0% · 600 recorded · 594 measured · Source: the US BTS Apr · 84.7% · 722 recorded · 718 measured · Source: the US BTS May · 83.4% · 805 recorded · 805 measured · Source: the US BTS Jun · 81.6% · 780 recorded · 778 measured · Source: the US BTS Jul · 73.3% · 802 recorded · 784 measured · Source: the US BTS Aug · 81.0% · 392 recorded · 389 measured · Source: the US BTS Sep · 88.4% · 404 recorded · 404 measured · Source: the US BTS Oct · 86.9% · 555 recorded · 555 measured · Source: the US BTS Nov · 85.7% · 600 recorded · 593 measured · Source: the US BTS Dec · 82.2% · 546 recorded · 546 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 · 9.8 min · 506 recorded · 494 measured · Source: the US BTS Feb · 5.6 min · 448 recorded · 448 measured · Source: the US BTS Mar · 15.4 min · 600 recorded · 594 measured · Source: the US BTS Apr · 11.2 min · 722 recorded · 718 measured · Source: the US BTS May · 10.5 min · 805 recorded · 805 measured · Source: the US BTS Jun · 16.1 min · 780 recorded · 778 measured · Source: the US BTS Jul · 31.6 min · 802 recorded · 784 measured · Source: the US BTS Aug · 14.8 min · 392 recorded · 389 measured · Source: the US BTS Sep · 4.7 min · 404 recorded · 404 measured · Source: the US BTS Oct · 6.9 min · 555 recorded · 555 measured · Source: the US BTS Nov · 8.0 min · 600 recorded · 593 measured · Source: the US BTS Dec · 11.6 min · 546 recorded · 546 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 · 506 · 506 recorded · 494 measured · Source: the US BTS Feb · 448 · 448 recorded · 448 measured · Source: the US BTS Mar · 600 · 600 recorded · 594 measured · Source: the US BTS Apr · 722 · 722 recorded · 718 measured · Source: the US BTS May · 805 · 805 recorded · 805 measured · Source: the US BTS Jun · 780 · 780 recorded · 778 measured · Source: the US BTS Jul · 802 · 802 recorded · 784 measured · Source: the US BTS Aug · 392 · 392 recorded · 389 measured · Source: the US BTS Sep · 404 · 404 recorded · 404 measured · Source: the US BTS Oct · 555 · 555 recorded · 555 measured · Source: the US BTS Nov · 600 · 600 recorded · 593 measured · Source: the US BTS Dec · 546 · 546 recorded · 546 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan83.8%9.8 min494506
Feb86.4%5.6 min448448
Mar82.0%15.4 min594600
Apr84.7%11.2 min718722
May83.4%10.5 min805805
Jun81.6%16.1 min778780
Jul73.3%31.6 min784802
Aug81.0%14.8 min389392
Sep88.4%4.7 min404404
Oct86.9%6.9 min555555
Nov85.7%8.0 min593600
Dec82.2%11.6 min546546

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 82.2% 5,888
  • Delayed >15 min 17.0% 1,220
  • Cancelled 0.7% 52
  • 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

64
64 of 64
Flight numbersBy direction DeparturesOn time
UA1738 IAD → ORD 652 83.4%
UA2497 IAD → ORD 589 71.2%
UA2331 IAD → ORD 505 86.0%
UA587 ORD → IAD 318 79.1%
UA1775 IAD → ORD 310 93.5%
UA2677 ORD → IAD 229 59.5%
UA276 ORD → IAD 199 64.5%
UA2440 IAD → ORD 164 95.1%
UA2277 ORD → IAD 161 90.6%
UA444 ORD → IAD 154 79.9%
UA545 ORD → IAD 148 89.9%
UA708 IAD → ORD 145 97.9%
UA1357 ORD → IAD 135 89.6%
UA1252 IAD → ORD 125 91.9%
UA2437 ORD → IAD 125 78.9%
UA2029 ORD → IAD 124 87.9%
UA293 ORD → IAD 123 73.6%
UA1830 ORD → IAD 111 89.1%
UA1869 ORD → IAD 105 87.6%
UA2202 ORD → IAD 93 66.7%
UA1057 IAD → ORD 89 70.8%
UA1634 ORD → IAD 89 71.9%
UA1689 ORD → IAD 71 100.0%
UA2337 ORD → IAD 70 82.9%
UA1030 ORD → IAD 68 88.2%
UA2304 IAD → ORD 63 81.0%
UA2649 IAD → ORD 56 83.9%
UA1023 ORD → IAD 55 68.5%
UA1778 IAD → ORD 55 98.2%
UA2386 ORD → IAD 55 72.2%
UA1113 ORD → IAD 51 84.3%
UA1316 IAD → ORD 51 98.0%
UA279 IAD → ORD 50 91.8%
UA1117 IAD → ORD 37 86.5%
UA1193 IAD → ORD 37 83.8%
UA1377 ORD → IAD 37 91.9%
UA1393 IAD → ORD 37 75.0%
UA2056 IAD → ORD 37 100.0%
UA2070 IAD → ORD 37 94.6%
UA2401 IAD → ORD 37 94.6%
UA2431 ORD → IAD 37 83.8%
UA2451 ORD → IAD 37 89.2%
UA2490 ORD → IAD 37 89.2%
UA2746 ORD → IAD 37 69.4%
UA2794 ORD → IAD 37 73.0%
UA672 IAD → ORD 37 100.0%
UA673 IAD → ORD 37 91.7%
UA1140 ORD → IAD 36 83.3%
UA1616 ORD → IAD 36 88.9%
UA1909 IAD → ORD 36 88.9%
UA210 ORD → IAD 36 88.9%
UA2766 ORD → IAD 36 75.0%
UA426 ORD → IAD 36 66.7%
UA758 ORD → IAD 36 86.1%
UA1015 ORD → IAD 35 68.6%
UA1190 ORD → IAD 35 94.3%
UA1630 IAD → ORD 32 93.6%
UA1642 IAD → ORD 32 84.4%
UA1651 IAD → ORD 32 90.6%
UA1892 ORD → IAD 32 71.9%
UA2216 ORD → IAD 32 93.6%
UA2223 ORD → IAD 32 65.6%
UA1379 ORD → IAD 31 90.3%
UA2748 IAD → ORD 31 96.8%

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 420 +15.4% 12 78.3%
June 2026 418 +16.1% 2 85.9%
May 2026 433 +16.4% 0 85.0%
April 2026 362 +1.7% 0 82.6%
March 2026 290 −4.6% 6 77.9%
February 2026 224 +0.0% 0 86.6%
January 2026 250 +2.5% 8 83.2%
December 2025 291 +14.1% 0 81.4%
November 2025 296 −0.3% 6 79.7%
October 2025 353 +74.8% 0 83.6%
September 2025 404 0 88.4%
August 2025 389 3 81.0%
July 2025 364 6 67.6%
June 2025 360 0 76.7%
May 2025 372 0 81.5%
April 2025 356 4 86.8%
March 2025 304 0 85.9%
February 2025 224 0 86.2%
January 2025 244 4 84.4%
December 2024 255 0 83.1%
November 2024 297 1 91.6%
October 2024 202 0 92.6%

How to read this chart

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