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Route · SLC → DCA · 2020–2025 BTS data

Salt Lake City to Washington

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SLC to DCA (Salt Lake City to Washington) ranks #3941 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

85.1%
On-time
+6.1 pts
vs US avg
64 min
Delay when late
1,807
Flights
#3941 of 4927
Corpus placement

Cancelled

0.8%

Best Month

N/A

Worst Month

N/A

Distance

1,851 mi

Carriers

1

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 31 2 0 0 DL
Nov 2025 30 4 0 0 DL
Oct 2025 31 4 0 0 DL
Sep 2025 30 4 0 1 DL
Aug 2025 31 6 0 0 DL
Jul 2025 31 2 0 6 DL
Jun 2025 30 6 1 1 DL
May 2025 31 9 1 1 DL
Apr 2025 30 2 1 0 DL
Mar 2025 31 7 0 1 DL
Jan 2025 31 9 0 0 DL
Dec 2024 31 7 0 0 DL
Nov 2024 30 2 0 0 DL
Oct 2024 31 5 0 0 DL
Sep 2024 30 4 0 0 DL
Aug 2024 31 1 0 1 DL
Jul 2024 31 4 3 0 DL
Jun 2024 30 4 0 0 DL
May 2024 31 4 0 0 DL
Apr 2024 30 6 0 0 DL
Mar 2024 31 7 0 0 DL
Jan 2024 31 4 0 0 DL
Dec 2023 31 3 0 0 DL
Nov 2023 30 2 0 0 DL

SLC–DCA seasonal on-time pattern

Best: November (91.1%) · weakest: May (78.7%)

75%80%85%90%95% JanMarAprMayJunJulAugSepOctNovDec 81.9%

Strongest calendar month

November

91.1% on-time · ~30 flights/mo

Busiest calendar month

January

~31 flights/mo avg

Weakest calendar month

May

78.7% on-time · ~31 flights/mo

Cancellation Rate

0.8%

6 of 735 flights

Diversion Rate

1.5%

11 of 735 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

SLC - Salt Lake City

Full on-time, delay-cause, and seasonal performance for Salt Lake City, UT.

SLC on-time profile

DCA - Washington

Full on-time, delay-cause, and seasonal performance for Washington, DC.

DCA on-time profile

Compare the two airports

See SLC and DCA side by side on delays, cancellations, and reliability.

Compare SLC vs DCA

Origin-hub reliability standing

Among SLC's stronger departures

SLC → DCA posts a 85.1% on-time rate, landing in the ≥85% band with 54 of 85 BTS-tracked routes leaving Salt Lake City. The same hub also shows 31 mid-band and 0 challenged departures · fleet-wide on-time rank #1198 of 4927 (highest on-time = #1).

What the Data Says About SLC to DCA

Salt Lake City to Washington (SLC to DCA) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.1% on-time rate across 1,807 flights, with delays that do happen averaging 63.8 minutes. The corridor runs roughly 1,851 miles and is served by 1 carrier. Over the most recent 24 months, 6 of 735 flights were cancelled (0.8%) and 11 diverted (1.5%).

Monthly performance data for this route did not show a clear best/worst split in the sample window; review the monthly table above for period-by-period detail.

On the multi-year calendar, SLC–DCA peaks in November at 91.1% on-time while January carries the heaviest traffic (~31 flights per month) ; the softest month is May at 78.7%, a 12.4-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SLC to DCA rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SLC to DCA ranks #3941 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from SLC to DCA? ▼
Flights from Salt Lake City to Washington have a 85.1% on-time rate based on 1,807 flights. The average delay is 63.8 minutes.
What is the cancellation rate for SLC to DCA? ▼
Over the last 24 months, 0.8% of flights on this route were cancelled (6 of 735 flights) and 1.5% were diverted.
How far is the flight from SLC to DCA? ▼
The flight distance from Salt Lake City (SLC) to Washington (DCA) is approximately 1,851 miles. This route is served by 1 carrier.

Airports on this route

SLC Airport

Salt Lake City
DCA Airport

Washington
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using SLC–DCA data

SLC–DCA runs 6.1 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare SLC and DCA airport profiles: delay causes and top routes differ even on the same corridor. SLC airport
  • If your dates flex, November (91.1% on-time) beats May (78.7%) on this corridor. Seasonal chart
  • 4 other routes post a similar 85.1% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.