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2,935 km · Domestic

Washington Dulles (IAD) – Salt Lake City (SLC)

In July 2026, 119 flights operated between Washington Dulles and Salt Lake City (both directions), and 77.3% 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
January122117▼ 4.1%
February112108▼ 3.6%
March124122▼ 1.6%
April118120▲ 1.7%
May121124▲ 2.5%
June122118▼ 3.3%
July124119▼ 4.0%
August125––
September120––
October124–in progress
November118––
December90––
Year to date (Jan–Jul)843828▼ 1.8%

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
January82.8%84.6%▲ 2.2%
February79.5%86.1%▲ 8.3%
March88.7%85.2%▼ 3.9%
April89.0%91.7%▲ 3.0%
May86.8%91.1%▲ 5.0%
June73.0%89.0%▲ 21.9%
July83.1%77.3%▼ 7.0%
August92.8%––
September90.8%––
October91.1%–in progress
November86.4%––
December85.6%––
Year-to-date average (Jan–Jul)83.3%86.4%▲ 3.8%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January27▲ 250.0%
February04–
March02–
April10▼ 100.0%
May30▼ 100.0%
June02–
July04–
August0––
September0––
October0–in progress
November0––
December2––
Year to date (Jan–Jul)619▲ 216.7%

Airlines on this route

  1. Delta Air Lines 53.4%
  2. United Airlines 46.6%

Oct 1, 2024 – Jul 31, 2026

By direction

IAD → SLC

Scheduled flights
1,233
Flights operated
1,221
Cancelled
12 · 1.0%
On-time departures
85.4%

SLC → IAD

Scheduled flights
1,230
Flights operated
1,215
Cancelled
15 · 1.2%
On-time departures
86.7%

IAD → SLC and SLC → IAD counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Delta Air Lines DL 1,316 53.4% 86.6% 12
United Airlines UA 1,147 46.6% 85.5% 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 delay23:00–00:004.2min · 216 recorded · 213 measured
Gap to highest-delay hour8.5min23:00 ↔ 17:00
Recorded flights2,463IAD–SLC

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 · Fewer than 200 measured departures · 47 recorded · 47 measured · Source: the US BTS 07:00 · 89.7% · 631 recorded · 624 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 89 recorded · 88 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 87 recorded · 85 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 161 recorded · 159 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 61 recorded · 61 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 17:00 · 81.1% · 1,113 recorded · 1,101 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 58 recorded · 58 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 · 89.7% · 216 recorded · 213 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 · Fewer than 200 measured departures · 47 recorded · 47 measured · Source: the US BTS 07:00 · 8.5 min · 631 recorded · 624 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 89 recorded · 88 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 87 recorded · 85 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 161 recorded · 159 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 61 recorded · 61 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 17:00 · 12.7 min · 1,113 recorded · 1,101 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 58 recorded · 58 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 · 4.2 min · 216 recorded · 213 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 · 47 · 47 recorded · 47 measured · Source: the US BTS 07:00 · 631 · 631 recorded · 624 measured · Source: the US BTS 08:00 · 89 · 89 recorded · 88 measured · Source: the US BTS 09:00 · 87 · 87 recorded · 85 measured · Source: the US BTS 10:00 · 161 · 161 recorded · 159 measured · Source: the US BTS 11:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 12:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 13:00 · 61 · 61 recorded · 61 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 17:00 · 1,113 · 1,113 recorded · 1,101 measured · Source: the US BTS 18:00 · 58 · 58 recorded · 58 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 · 216 · 216 recorded · 213 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———
06:00Fewer than 200 measured departures—4747
07:0089.7%8.5 min624631
08:00Fewer than 200 measured departures—8889
09:00Fewer than 200 measured departures—8587
10:00Fewer than 200 measured departures—159161
11:00No observations———
12:00No observations———
13:00Fewer than 200 measured departures—6161
14:00No observations———
15:00No observations———
16:00No observations———
17:0081.1%12.7 min1,1011,113
18:00Fewer than 200 measured departures—5858
19:00No observations———
20:00No observations———
21:00No observations———
22:00No observations———
23:0089.7%4.2 min213216

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 85.0% · 353 recorded · 347 measured · Source: the US BTS Tuesday · 86.2% · 350 recorded · 347 measured · Source: the US BTS Wednesday · 88.2% · 348 recorded · 346 measured · Source: the US BTS Thursday · 86.0% · 352 recorded · 351 measured · Source: the US BTS Friday · 85.5% · 354 recorded · 352 measured · Source: the US BTS Saturday · 88.6% · 354 recorded · 352 measured · Source: the US BTS Sunday · 83.0% · 352 recorded · 341 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 · 9.0 min · 353 recorded · 347 measured · Source: the US BTS Tuesday · 10.7 min · 350 recorded · 347 measured · Source: the US BTS Wednesday · 7.0 min · 348 recorded · 346 measured · Source: the US BTS Thursday · 11.1 min · 352 recorded · 351 measured · Source: the US BTS Friday · 11.1 min · 354 recorded · 352 measured · Source: the US BTS Saturday · 5.9 min · 354 recorded · 352 measured · Source: the US BTS Sunday · 8.0 min · 352 recorded · 341 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 · 353 · 353 recorded · 347 measured · Source: the US BTS Tuesday · 350 · 350 recorded · 347 measured · Source: the US BTS Wednesday · 348 · 348 recorded · 346 measured · Source: the US BTS Thursday · 352 · 352 recorded · 351 measured · Source: the US BTS Friday · 354 · 354 recorded · 352 measured · Source: the US BTS Saturday · 354 · 354 recorded · 352 measured · Source: the US BTS Sunday · 352 · 352 recorded · 341 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
Monday85.0%9.0 min347353
Tuesday86.2%10.7 min347350
Wednesday88.2%7.0 min346348
Thursday86.0%11.1 min351352
Friday85.5%11.1 min352354
Saturday88.6%5.9 min352354
Sunday83.0%8.0 min341352

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 · 83.7% · 248 recorded · 239 measured · Source: the US BTS Feb · 82.7% · 224 recorded · 220 measured · Source: the US BTS Mar · 87.0% · 248 recorded · 246 measured · Source: the US BTS Apr · 90.3% · 239 recorded · 238 measured · Source: the US BTS May · 89.0% · 248 recorded · 245 measured · Source: the US BTS Jun · 80.8% · 242 recorded · 240 measured · Source: the US BTS Jul · 80.3% · 247 recorded · 243 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 125 recorded · 125 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 120 recorded · 120 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 164 recorded · 164 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 178 recorded · 178 measured · Source: the US BTS Dec · Fewer than 200 measured departures · 180 recorded · 178 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 · 11.7 min · 248 recorded · 239 measured · Source: the US BTS Feb · 10.1 min · 224 recorded · 220 measured · Source: the US BTS Mar · 7.9 min · 248 recorded · 246 measured · Source: the US BTS Apr · 3.9 min · 239 recorded · 238 measured · Source: the US BTS May · 3.8 min · 248 recorded · 245 measured · Source: the US BTS Jun · 17.2 min · 242 recorded · 240 measured · Source: the US BTS Jul · 18.8 min · 247 recorded · 243 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 125 recorded · 125 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 120 recorded · 120 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 164 recorded · 164 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 178 recorded · 178 measured · Source: the US BTS Dec · Fewer than 200 measured departures · 180 recorded · 178 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 · 248 · 248 recorded · 239 measured · Source: the US BTS Feb · 224 · 224 recorded · 220 measured · Source: the US BTS Mar · 248 · 248 recorded · 246 measured · Source: the US BTS Apr · 239 · 239 recorded · 238 measured · Source: the US BTS May · 248 · 248 recorded · 245 measured · Source: the US BTS Jun · 242 · 242 recorded · 240 measured · Source: the US BTS Jul · 247 · 247 recorded · 243 measured · Source: the US BTS Aug · 125 · 125 recorded · 125 measured · Source: the US BTS Sep · 120 · 120 recorded · 120 measured · Source: the US BTS Oct · 164 · 164 recorded · 164 measured · Source: the US BTS Nov · 178 · 178 recorded · 178 measured · Source: the US BTS Dec · 180 · 180 recorded · 178 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
Jan83.7%11.7 min239248
Feb82.7%10.1 min220224
Mar87.0%7.9 min246248
Apr90.3%3.9 min238239
May89.0%3.8 min245248
Jun80.8%17.2 min240242
Jul80.3%18.8 min243247
AugFewer than 200 measured departures—125125
SepFewer than 200 measured departures—120120
OctFewer than 200 measured departures—164164
NovFewer than 200 measured departures—178178
DecFewer than 200 measured departures—178180

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 85.1% 2,097
  • Delayed >15 min 13.8% 339
  • Cancelled 1.1% 27
  • 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

15
15 of 15
Flight numbersBy direction DeparturesOn time
DL432 IAD → SLC 657 90.3%
DL847 SLC → IAD 657 82.8%
UA2410 IAD → SLC 419 80.0%
UA1322 SLC → IAD 74 91.9%
UA688 SLC → IAD 74 94.4%
UA215 SLC → IAD 54 88.9%
UA1527 SLC → IAD 50 91.8%
UA726 SLC → IAD 41 95.0%
UA1140 SLC → IAD 37 97.3%
UA1226 SLC → IAD 37 91.9%
UA1437 IAD → SLC 37 81.1%
UA1790 IAD → SLC 36 83.3%
UA1057 SLC → IAD 35 97.1%
UA1986 SLC → IAD 31 100.0%
UA2264 SLC → IAD 30 89.3%

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 119 −4.0% 4 77.3%
June 2026 118 −3.3% 2 89.0%
May 2026 124 +2.5% 0 91.1%
April 2026 120 +1.7% 0 91.7%
March 2026 122 −1.6% 2 85.2%
February 2026 108 −3.6% 4 86.1%
January 2026 117 −4.1% 7 84.6%
December 2025 90 +2.3% 2 85.6%
November 2025 118 +96.7% 0 86.4%
October 2025 124 +210.0% 0 91.1%
September 2025 120 0 90.8%
August 2025 125 0 92.8%
July 2025 124 0 83.1%
June 2025 122 0 73.0%
May 2025 121 3 86.8%
April 2025 118 1 89.0%
March 2025 124 0 88.7%
February 2025 112 0 79.5%
January 2025 122 2 82.8%
December 2024 88 0 81.8%
November 2024 60 0 91.7%
October 2024 40 0 87.5%

How to read this chart

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