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2,189 km · Domestic

Washington Dulles (IAD) – San Antonio (SAT)

In July 2026, 116 flights operated between Washington Dulles and San Antonio (both directions), and 81.0% 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
January10791▼ 15.0%
February9692▼ 4.2%
March102114▲ 11.8%
April112100▼ 10.7%
May106100▼ 5.7%
June102112▲ 9.8%
July1161160.0%
August102––
September102––
October109–in progress
November120––
December116––
Year to date (Jan–Jul)741725▼ 2.2%

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
January82.2%89.0%▲ 8.3%
February88.5%91.3%▲ 3.2%
March89.2%92.1%▲ 3.3%
April90.2%93.0%▲ 3.1%
May85.8%96.0%▲ 11.9%
June83.3%84.8%▲ 1.8%
July81.0%81.0%0.0%
August94.1%––
September92.2%––
October97.2%–in progress
November86.7%––
December87.9%––
Year-to-date average (Jan–Jul)85.7%89.6%▲ 4.5%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January15▲ 400.0%
February00–
March00–
April02–
May20▼ 100.0%
June00–
July00–
August0––
September0––
October1–in progress
November0––
December0––
Year to date (Jan–Jul)37▲ 133.3%

By direction

IAD → SAT

Scheduled flights
1,155
Flights operated
1,149
Cancelled
6 · 0.5%
On-time departures
86.2%

SAT → IAD

Scheduled flights
1,155
Flights operated
1,149
Cancelled
6 · 0.5%
On-time departures
90.7%

IAD → SAT and SAT → IAD counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
United Airlines UA 2,310 100.0% 88.5% 12

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 delay08:00–09:000.2min · 508 recorded · 505 measured
Gap to highest-delay hour22.0min08:00 ↔ 17:00
Recorded flights2,310IAD–SAT

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 · 93.1% · 597 recorded · 593 measured · Source: the US BTS 08:00 · 94.7% · 508 recorded · 505 measured · Source: the US BTS 09:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 106 recorded · 106 measured · Source: the US BTS 12:00 · 87.8% · 451 recorded · 449 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS 17:00 · 79.5% · 627 recorded · 624 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 20 recorded · 20 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 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

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 · 1.3 min · 597 recorded · 593 measured · Source: the US BTS 08:00 · 0.2 min · 508 recorded · 505 measured · Source: the US BTS 09:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 106 recorded · 106 measured · Source: the US BTS 12:00 · 6.5 min · 451 recorded · 449 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS 17:00 · 22.2 min · 627 recorded · 624 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 20 recorded · 20 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 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

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 · 597 · 597 recorded · 593 measured · Source: the US BTS 08:00 · 508 · 508 recorded · 505 measured · Source: the US BTS 09:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · 106 · 106 recorded · 106 measured · Source: the US BTS 12:00 · 451 · 451 recorded · 449 measured · Source: the US BTS 13:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 14:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · 1 · 1 recorded · 1 measured · Source: the US BTS 17:00 · 627 · 627 recorded · 624 measured · Source: the US BTS 18:00 · 20 · 20 recorded · 20 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · No observations · 0 recorded · 0 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

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
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:00No observations———
07:0093.1%1.3 min593597
08:0094.7%0.2 min505508
09:00No observations———
10:00No observations———
11:00Fewer than 200 measured departures—106106
12:0087.8%6.5 min449451
13:00No observations———
14:00No observations———
15:00No observations———
16:00Fewer than 200 measured departures—11
17:0079.5%22.2 min624627
18:00Fewer than 200 measured departures—2020
19:00No observations———
20:00No observations———
21:00No observations———
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 · 90.6% · 375 recorded · 373 measured · Source: the US BTS Tuesday · 88.4% · 328 recorded · 328 measured · Source: the US BTS Wednesday · 88.7% · 318 recorded · 318 measured · Source: the US BTS Thursday · 88.7% · 375 recorded · 372 measured · Source: the US BTS Friday · 88.5% · 376 recorded · 375 measured · Source: the US BTS Saturday · 84.3% · 218 recorded · 216 measured · Source: the US BTS Sunday · 88.3% · 320 recorded · 316 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 · 4.3 min · 375 recorded · 373 measured · Source: the US BTS Tuesday · 10.5 min · 328 recorded · 328 measured · Source: the US BTS Wednesday · 6.6 min · 318 recorded · 318 measured · Source: the US BTS Thursday · 7.2 min · 375 recorded · 372 measured · Source: the US BTS Friday · 6.5 min · 376 recorded · 375 measured · Source: the US BTS Saturday · 16.9 min · 218 recorded · 216 measured · Source: the US BTS Sunday · 9.1 min · 320 recorded · 316 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 · 375 · 375 recorded · 373 measured · Source: the US BTS Tuesday · 328 · 328 recorded · 328 measured · Source: the US BTS Wednesday · 318 · 318 recorded · 318 measured · Source: the US BTS Thursday · 375 · 375 recorded · 372 measured · Source: the US BTS Friday · 376 · 376 recorded · 375 measured · Source: the US BTS Saturday · 218 · 218 recorded · 216 measured · Source: the US BTS Sunday · 320 · 320 recorded · 316 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday90.6%4.3 min373375
Tuesday88.4%10.5 min328328
Wednesday88.7%6.6 min318318
Thursday88.7%7.2 min372375
Friday88.5%6.5 min375376
Saturday84.3%16.9 min216218
Sunday88.3%9.1 min316320

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 · Fewer than 200 measured departures · 204 recorded · 198 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 188 recorded · 188 measured · Source: the US BTS Mar · 90.7% · 216 recorded · 216 measured · Source: the US BTS Apr · 91.5% · 214 recorded · 212 measured · Source: the US BTS May · 90.8% · 208 recorded · 206 measured · Source: the US BTS Jun · 84.1% · 214 recorded · 214 measured · Source: the US BTS Jul · 81.0% · 232 recorded · 232 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 102 recorded · 102 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 102 recorded · 102 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 182 recorded · 181 measured · Source: the US BTS Nov · 87.4% · 222 recorded · 222 measured · Source: the US BTS Dec · 87.1% · 226 recorded · 225 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 · Fewer than 200 measured departures · 204 recorded · 198 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 188 recorded · 188 measured · Source: the US BTS Mar · 3.1 min · 216 recorded · 216 measured · Source: the US BTS Apr · 0.9 min · 214 recorded · 212 measured · Source: the US BTS May · 4.7 min · 208 recorded · 206 measured · Source: the US BTS Jun · 20.5 min · 214 recorded · 214 measured · Source: the US BTS Jul · 28.2 min · 232 recorded · 232 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 102 recorded · 102 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 102 recorded · 102 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 182 recorded · 181 measured · Source: the US BTS Nov · 4.3 min · 222 recorded · 222 measured · Source: the US BTS Dec · 10.6 min · 226 recorded · 225 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 · 204 · 204 recorded · 198 measured · Source: the US BTS Feb · 188 · 188 recorded · 188 measured · Source: the US BTS Mar · 216 · 216 recorded · 216 measured · Source: the US BTS Apr · 214 · 214 recorded · 212 measured · Source: the US BTS May · 208 · 208 recorded · 206 measured · Source: the US BTS Jun · 214 · 214 recorded · 214 measured · Source: the US BTS Jul · 232 · 232 recorded · 232 measured · Source: the US BTS Aug · 102 · 102 recorded · 102 measured · Source: the US BTS Sep · 102 · 102 recorded · 102 measured · Source: the US BTS Oct · 182 · 182 recorded · 181 measured · Source: the US BTS Nov · 222 · 222 recorded · 222 measured · Source: the US BTS Dec · 226 · 226 recorded · 225 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
JanFewer than 200 measured departures—198204
FebFewer than 200 measured departures—188188
Mar90.7%3.1 min216216
Apr91.5%0.9 min212214
May90.8%4.7 min206208
Jun84.1%20.5 min214214
Jul81.0%28.2 min232232
AugFewer than 200 measured departures—102102
SepFewer than 200 measured departures—102102
OctFewer than 200 measured departures—181182
Nov87.4%4.3 min222222
Dec87.1%10.6 min225226

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 88.0% 2,033
  • Delayed >15 min 11.5% 265
  • Cancelled 0.5% 12
  • 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

8
8 of 8
Flight numbersBy direction DeparturesOn time
UA1869 IAD → SAT 615 79.6%
UA2250 SAT → IAD 557 88.1%
UA1789 IAD → SAT 443 95.0%
UA471 SAT → IAD 307 94.4%
UA1347 SAT → IAD 215 91.1%
UA2671 IAD → SAT 52 94.2%
UA2704 SAT → IAD 36 97.2%
UA1677 IAD → SAT 32 81.3%

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 116 +0.0% 0 81.0%
June 2026 112 +9.8% 0 84.8%
May 2026 100 −5.7% 0 96.0%
April 2026 100 −10.7% 2 93.0%
March 2026 114 +11.8% 0 92.1%
February 2026 92 −4.2% 0 91.3%
January 2026 91 −15.0% 5 89.0%
December 2025 116 +6.4% 0 87.9%
November 2025 120 +17.6% 0 86.7%
October 2025 109 +51.4% 1 97.2%
September 2025 102 0 92.2%
August 2025 102 0 94.1%
July 2025 116 0 81.0%
June 2025 102 0 83.3%
May 2025 106 2 85.8%
April 2025 112 0 90.2%
March 2025 102 0 89.2%
February 2025 96 0 88.5%
January 2025 107 1 82.2%
December 2024 109 1 86.2%
November 2024 102 0 88.2%
October 2024 72 0 88.9%

How to read this chart

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