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2,972 km · Domestic

Ronald Reagan Washington National (DCA) – Salt Lake City (SLC)

In July 2026, 59 flights operated between Ronald Reagan Washington National and Salt Lake City (both directions), and 86.4% 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
January6260▼ 3.2%
February5652▼ 7.1%
March6162▲ 1.6%
April5960▲ 1.7%
May6062▲ 3.3%
June5860▲ 3.4%
July6259▼ 4.8%
August62––
September60––
October62–in progress
November60––
December62––
Year to date (Jan–Jul)418415▼ 0.7%

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
January82.3%73.3%▼ 10.9%
February60.7%80.8%▲ 33.1%
March80.3%79.0%▼ 1.6%
April94.9%86.7%▼ 8.6%
May81.7%82.3%▲ 0.7%
June75.9%70.0%▼ 7.8%
July77.4%86.4%▲ 11.6%
August85.5%––
September88.3%––
October90.3%–in progress
November86.7%––
December91.9%––
Year-to-date average (Jan–Jul)79.0%79.8%▲ 1.0%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January02–
February04–
March10▼ 100.0%
April10▼ 100.0%
May20▼ 100.0%
June20▼ 100.0%
July01–
August0––
September0––
October0–in progress
November0––
December0––
Year to date (Jan–Jul)67▲ 16.7%

By direction

DCA → SLC

Scheduled flights
657
Flights operated
650
Cancelled
7 · 1.1%
On-time departures
78.8%

SLC → DCA

Scheduled flights
657
Flights operated
651
Cancelled
6 · 0.9%
On-time departures
86.3%

DCA → SLC and SLC → DCA counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Delta Air Lines DL 1,314 100.0% 82.6% 13

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 delay10:00–11:002.6min · 243 recorded · 242 measured
Gap to highest-delay hour13.2min10:00 ↔ 17:00
Recorded flights1,314DCA–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 · No observations · 0 recorded · 0 measured · Source: the US BTS 07:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 09:00 · 85.5% · 413 recorded · 408 measured · Source: the US BTS 10:00 · 87.6% · 243 recorded · 242 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 1 recorded · 1 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 17:00 · 78.7% · 656 recorded · 649 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 09:00 · 5.0 min · 413 recorded · 408 measured · Source: the US BTS 10:00 · 2.6 min · 243 recorded · 242 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 1 recorded · 1 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 1 recorded · 1 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 17:00 · 15.7 min · 656 recorded · 649 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 09:00 · 413 · 413 recorded · 408 measured · Source: the US BTS 10:00 · 243 · 243 recorded · 242 measured · Source: the US BTS 11:00 · 1 · 1 recorded · 1 measured · Source: the US BTS 12:00 · 1 · 1 recorded · 1 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 · No observations · 0 recorded · 0 measured · Source: the US BTS 17:00 · 656 · 656 recorded · 649 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 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———
07:00No observations———
08:00No observations———
09:0085.5%5.0 min408413
10:0087.6%2.6 min242243
11:00Fewer than 200 measured departures—11
12:00Fewer than 200 measured departures—11
13:00No observations———
14:00No observations———
15:00No observations———
16:00No observations———
17:0078.7%15.7 min649656
18:00No observations———
19:00No observations———
20:00No observations———
21:00No observations———
22:00No observations———
23:00No observations———

Day of week

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 188 · 188 recorded · 187 measured · Source: the US BTS Tuesday · 188 · 188 recorded · 187 measured · Source: the US BTS Wednesday · 188 · 188 recorded · 188 measured · Source: the US BTS Thursday · 188 · 188 recorded · 188 measured · Source: the US BTS Friday · 188 · 188 recorded · 187 measured · Source: the US BTS Saturday · 186 · 186 recorded · 180 measured · Source: the US BTS Sunday · 188 · 188 recorded · 184 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.

View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
MondayFewer than 200 measured departures—187188
TuesdayFewer than 200 measured departures—187188
WednesdayFewer than 200 measured departures—188188
ThursdayFewer than 200 measured departures—188188
FridayFewer than 200 measured departures—187188
SaturdayFewer than 200 measured departures—180186
SundayFewer than 200 measured departures—184188

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 124 · 124 recorded · 122 measured · Source: the US BTS Feb · 112 · 112 recorded · 108 measured · Source: the US BTS Mar · 124 · 124 recorded · 123 measured · Source: the US BTS Apr · 120 · 120 recorded · 119 measured · Source: the US BTS May · 124 · 124 recorded · 122 measured · Source: the US BTS Jun · 120 · 120 recorded · 118 measured · Source: the US BTS Jul · 122 · 122 recorded · 121 measured · Source: the US BTS Aug · 62 · 62 recorded · 62 measured · Source: the US BTS Sep · 60 · 60 recorded · 60 measured · Source: the US BTS Oct · 102 · 102 recorded · 102 measured · Source: the US BTS Nov · 120 · 120 recorded · 120 measured · Source: the US BTS Dec · 124 · 124 recorded · 124 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

No bucket in this view has 200 measured departures yet. Flight counts are shown; on-time and delay charts become available when the sample is large enough.

View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
JanFewer than 200 measured departures—122124
FebFewer than 200 measured departures—108112
MarFewer than 200 measured departures—123124
AprFewer than 200 measured departures—119120
MayFewer than 200 measured departures—122124
JunFewer than 200 measured departures—118120
JulFewer than 200 measured departures—121122
AugFewer than 200 measured departures—6262
SepFewer than 200 measured departures—6060
OctFewer than 200 measured departures—102102
NovFewer than 200 measured departures—120120
DecFewer than 200 measured departures—124124

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 81.7% 1,074
  • Delayed >15 min 17.3% 227
  • Cancelled 1.0% 13
  • 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

2
Flight numbersBy direction DeparturesOn time
DL820 SLC → DCA 657 86.3%
DL820 DCA → SLC 656 78.7%

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 59 −4.8% 1 86.4%
June 2026 60 +3.4% 0 70.0%
May 2026 62 +3.3% 0 82.3%
April 2026 60 +1.7% 0 86.7%
March 2026 62 +1.6% 0 79.0%
February 2026 52 −7.1% 4 80.8%
January 2026 60 −3.2% 2 73.3%
December 2025 62 +0.0% 0 91.9%
November 2025 60 +0.0% 0 86.7%
October 2025 62 +55.0% 0 90.3%
September 2025 60 0 88.3%
August 2025 62 0 85.5%
July 2025 62 0 77.4%
June 2025 58 2 75.9%
May 2025 60 2 81.7%
April 2025 59 1 94.9%
March 2025 61 1 80.3%
February 2025 56 0 60.7%
January 2025 62 0 82.3%
December 2024 62 0 77.4%
November 2024 60 0 90.0%
October 2024 40 0 97.5%

How to read this chart

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