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3,618 km · Domestic

Washington Dulles (IAD) – San Diego (SAN)

In July 2026, 244 flights operated between Washington Dulles and San Diego (both directions), and 75.4% 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
January246215▼ 12.6%
February224200▼ 10.7%
March248231▼ 6.9%
April237221▼ 6.8%
May248240▼ 3.2%
June2402400.0%
July2442440.0%
August246––
September237––
October238–in progress
November230––
December244––
Year to date (Jan–Jul)1,6871,591▼ 5.7%

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
January86.2%86.0%▼ 0.2%
February84.4%90.5%▲ 7.2%
March90.7%81.0%▼ 10.7%
April84.8%93.7%▲ 10.5%
May89.5%90.4%▲ 1.0%
June83.3%88.8%▲ 6.6%
July79.5%75.4%▼ 5.2%
August87.4%––
September93.7%––
October95.4%–in progress
November86.1%––
December87.7%––
Year-to-date average (Jan–Jul)85.5%86.5%▲ 1.2%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January29▲ 350.0%
February00–
March02–
April30▼ 100.0%
May00–
June00–
July04–
August2––
September1––
October0–in progress
November0––
December0––
Year to date (Jan–Jul)515▲ 200.0%

Airlines on this route

  1. United Airlines 74.6%
  2. Alaska Airlines 25.4%

Oct 1, 2024 – Jul 31, 2026

By direction

IAD → SAN

Scheduled flights
2,570
Flights operated
2,560
Cancelled
10 · 0.4%
On-time departures
85.7%

SAN → IAD

Scheduled flights
2,570
Flights operated
2,557
Cancelled
13 · 0.5%
On-time departures
87.9%

IAD → SAN and SAN → IAD counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
United Airlines UA 3,836 74.6% 88.2% 18
Alaska Airlines AS 1,304 25.4% 82.5% 5

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 delay09:00–10:001.0min · 447 recorded · 443 measured
Gap to highest-delay hour14.7min09:00 ↔ 18:00
Recorded flights5,140IAD–SAN

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 · Fewer than 200 measured departures · 70 recorded · 70 measured · Source: the US BTS 08:00 · 90.3% · 1,257 recorded · 1,251 measured · Source: the US BTS 09:00 · 91.7% · 447 recorded · 443 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 148 recorded · 148 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · 88.3% · 917 recorded · 916 measured · Source: the US BTS 13:00 · 86.2% · 393 recorded · 391 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 10 recorded · 10 measured · Source: the US BTS 17:00 · 82.3% · 708 recorded · 705 measured · Source: the US BTS 18:00 · 80.7% · 489 recorded · 487 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 73 recorded · 73 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 7 recorded · 7 measured · Source: the US BTS 21:00 · 88.0% · 469 recorded · 466 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 150 recorded · 148 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 70 recorded · 70 measured · Source: the US BTS 08:00 · 4.6 min · 1,257 recorded · 1,251 measured · Source: the US BTS 09:00 · 1.0 min · 447 recorded · 443 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 148 recorded · 148 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · 4.1 min · 917 recorded · 916 measured · Source: the US BTS 13:00 · 7.2 min · 393 recorded · 391 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 2 recorded · 2 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 10 recorded · 10 measured · Source: the US BTS 17:00 · 8.1 min · 708 recorded · 705 measured · Source: the US BTS 18:00 · 15.8 min · 489 recorded · 487 measured · Source: the US BTS 19:00 · Fewer than 200 measured departures · 73 recorded · 73 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 7 recorded · 7 measured · Source: the US BTS 21:00 · 9.7 min · 469 recorded · 466 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 150 recorded · 148 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · 70 · 70 recorded · 70 measured · Source: the US BTS 08:00 · 1,257 · 1,257 recorded · 1,251 measured · Source: the US BTS 09:00 · 447 · 447 recorded · 443 measured · Source: the US BTS 10:00 · 148 · 148 recorded · 148 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · 917 · 917 recorded · 916 measured · Source: the US BTS 13:00 · 393 · 393 recorded · 391 measured · Source: the US BTS 14:00 · 2 · 2 recorded · 2 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · 10 · 10 recorded · 10 measured · Source: the US BTS 17:00 · 708 · 708 recorded · 705 measured · Source: the US BTS 18:00 · 489 · 489 recorded · 487 measured · Source: the US BTS 19:00 · 73 · 73 recorded · 73 measured · Source: the US BTS 20:00 · 7 · 7 recorded · 7 measured · Source: the US BTS 21:00 · 469 · 469 recorded · 466 measured · Source: the US BTS 22:00 · 150 · 150 recorded · 148 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———
07:00Fewer than 200 measured departures—7070
08:0090.3%4.6 min1,2511,257
09:0091.7%1.0 min443447
10:00Fewer than 200 measured departures—148148
11:00No observations———
12:0088.3%4.1 min916917
13:0086.2%7.2 min391393
14:00Fewer than 200 measured departures—22
15:00No observations———
16:00Fewer than 200 measured departures—1010
17:0082.3%8.1 min705708
18:0080.7%15.8 min487489
19:00Fewer than 200 measured departures—7373
20:00Fewer than 200 measured departures—77
21:0088.0%9.7 min466469
22:00Fewer than 200 measured departures—148150
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 87.6% · 742 recorded · 739 measured · Source: the US BTS Tuesday · 89.6% · 724 recorded · 723 measured · Source: the US BTS Wednesday · 88.6% · 732 recorded · 730 measured · Source: the US BTS Thursday · 84.9% · 744 recorded · 742 measured · Source: the US BTS Friday · 85.1% · 750 recorded · 750 measured · Source: the US BTS Saturday · 87.7% · 698 recorded · 697 measured · Source: the US BTS Sunday · 84.1% · 750 recorded · 736 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 · 5.3 min · 742 recorded · 739 measured · Source: the US BTS Tuesday · 3.5 min · 724 recorded · 723 measured · Source: the US BTS Wednesday · 5.9 min · 732 recorded · 730 measured · Source: the US BTS Thursday · 7.5 min · 744 recorded · 742 measured · Source: the US BTS Friday · 12.2 min · 750 recorded · 750 measured · Source: the US BTS Saturday · 6.7 min · 698 recorded · 697 measured · Source: the US BTS Sunday · 8.3 min · 750 recorded · 736 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 · 742 · 742 recorded · 739 measured · Source: the US BTS Tuesday · 724 · 724 recorded · 723 measured · Source: the US BTS Wednesday · 732 · 732 recorded · 730 measured · Source: the US BTS Thursday · 744 · 744 recorded · 742 measured · Source: the US BTS Friday · 750 · 750 recorded · 750 measured · Source: the US BTS Saturday · 698 · 698 recorded · 697 measured · Source: the US BTS Sunday · 750 · 750 recorded · 736 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday87.6%5.3 min739742
Tuesday89.6%3.5 min723724
Wednesday88.6%5.9 min730732
Thursday84.9%7.5 min742744
Friday85.1%12.2 min750750
Saturday87.7%6.7 min697698
Sunday84.1%8.3 min736750

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 · 86.1% · 472 recorded · 461 measured · Source: the US BTS Feb · 87.3% · 424 recorded · 424 measured · Source: the US BTS Mar · 86.0% · 481 recorded · 479 measured · Source: the US BTS Apr · 89.1% · 461 recorded · 458 measured · Source: the US BTS May · 90.0% · 488 recorded · 488 measured · Source: the US BTS Jun · 86.0% · 480 recorded · 480 measured · Source: the US BTS Jul · 77.5% · 492 recorded · 488 measured · Source: the US BTS Aug · 87.4% · 248 recorded · 246 measured · Source: the US BTS Sep · 93.7% · 238 recorded · 237 measured · Source: the US BTS Oct · 91.5% · 398 recorded · 398 measured · Source: the US BTS Nov · 87.1% · 466 recorded · 466 measured · Source: the US BTS Dec · 84.6% · 492 recorded · 492 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 · 8.6 min · 472 recorded · 461 measured · Source: the US BTS Feb · 3.7 min · 424 recorded · 424 measured · Source: the US BTS Mar · 7.5 min · 481 recorded · 479 measured · Source: the US BTS Apr · 5.5 min · 461 recorded · 458 measured · Source: the US BTS May · 5.8 min · 488 recorded · 488 measured · Source: the US BTS Jun · 7.2 min · 480 recorded · 480 measured · Source: the US BTS Jul · 15.2 min · 492 recorded · 488 measured · Source: the US BTS Aug · 5.0 min · 248 recorded · 246 measured · Source: the US BTS Sep · -0.9 min · 238 recorded · 237 measured · Source: the US BTS Oct · 3.5 min · 398 recorded · 398 measured · Source: the US BTS Nov · 6.0 min · 466 recorded · 466 measured · Source: the US BTS Dec · 11.6 min · 492 recorded · 492 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 · 472 · 472 recorded · 461 measured · Source: the US BTS Feb · 424 · 424 recorded · 424 measured · Source: the US BTS Mar · 481 · 481 recorded · 479 measured · Source: the US BTS Apr · 461 · 461 recorded · 458 measured · Source: the US BTS May · 488 · 488 recorded · 488 measured · Source: the US BTS Jun · 480 · 480 recorded · 480 measured · Source: the US BTS Jul · 492 · 492 recorded · 488 measured · Source: the US BTS Aug · 248 · 248 recorded · 246 measured · Source: the US BTS Sep · 238 · 238 recorded · 237 measured · Source: the US BTS Oct · 398 · 398 recorded · 398 measured · Source: the US BTS Nov · 466 · 466 recorded · 466 measured · Source: the US BTS Dec · 492 · 492 recorded · 492 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan86.1%8.6 min461472
Feb87.3%3.7 min424424
Mar86.0%7.5 min479481
Apr89.1%5.5 min458461
May90.0%5.8 min488488
Jun86.0%7.2 min480480
Jul77.5%15.2 min488492
Aug87.4%5.0 min246248
Sep93.7%-0.9 min237238
Oct91.5%3.5 min398398
Nov87.1%6.0 min466466
Dec84.6%11.6 min492492

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 86.4% 4,440
  • Delayed >15 min 13.2% 677
  • Cancelled 0.4% 23
  • 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

24
24 of 24
Flight numbersBy direction DeparturesOn time
UA1930 IAD → SAN 627 93.8%
UA2129 SAN → IAD 619 88.3%
AS322 SAN → IAD 452 86.9%
UA1071 SAN → IAD 444 90.5%
AS507 IAD → SAN 426 79.1%
UA2054 IAD → SAN 412 86.6%
UA2029 IAD → SAN 293 86.3%
UA755 SAN → IAD 260 89.6%
UA2163 IAD → SAN 226 85.8%
AS201 IAD → SAN 218 80.2%
AS506 SAN → IAD 198 82.7%
UA444 SAN → IAD 170 84.7%
UA1831 IAD → SAN 169 79.3%
UA1873 SAN → IAD 108 87.0%
UA2615 SAN → IAD 92 83.7%
UA660 SAN → IAD 45 100.0%
UA2031 SAN → IAD 37 94.4%
UA2421 SAN → IAD 37 89.2%
UA1357 IAD → SAN 36 80.6%
UA2710 IAD → SAN 36 94.4%
UA2713 IAD → SAN 36 58.3%
UA1580 SAN → IAD 32 80.0%
UA1738 SAN → IAD 31 87.1%
UA2654 IAD → SAN 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 244 +0.0% 4 75.4%
June 2026 240 +0.0% 0 88.8%
May 2026 240 −3.2% 0 90.4%
April 2026 221 −6.8% 0 93.7%
March 2026 231 −6.9% 2 81.0%
February 2026 200 −10.7% 0 90.5%
January 2026 215 −12.6% 9 86.0%
December 2025 244 −1.6% 0 87.7%
November 2025 230 −2.5% 0 86.1%
October 2025 238 +48.8% 0 95.4%
September 2025 237 1 93.7%
August 2025 246 2 87.4%
July 2025 244 0 79.5%
June 2025 240 0 83.3%
May 2025 248 0 89.5%
April 2025 237 3 84.8%
March 2025 248 0 90.7%
February 2025 224 0 84.4%
January 2025 246 2 86.2%
December 2024 248 0 81.5%
November 2024 236 0 88.1%
October 2024 160 0 85.6%

How to read this chart

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