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Route on-time record

DCA to SLC: most on-time flights and the best time to fly

Washington (Ronald Reagan Washington National Airport) to Salt Lake City (Salt Lake City International Airport). 365 nonstop flights in Jun 2025 to May 2026, 73% arrived within 15 minutes and 1.1% were cancelled. The most reliable flight number was Delta 820 at 5:12 PM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

Find me the most reliable flights fromtoonreturning(optional)

DCA → SLC

Washington to Salt Lake City: 365 nonstop flights a year

On time (12 months)

73%

Cancelled

1.1%

avg delay 21 min

Best time to leave

No clear winner

Most reliable airline

Delta

73% chance on time

Check DCA to SLC fares

Lowest nonstop fare seen in the next two months: $339 (Southwest 1249 on 2026-10-28). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.

Most reliable nonstop flights

Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.

  1. #1 · Delta 820

    5:12 PM → 8:12 PM4h 51m nonstop

    Local times, typical schedule. Last flown 2026-05-31.

    73%

    chance on time

    On time (history)
    73%
    Cancelled
    1.1%
    Avg arrival delay
    21 min
    • Arrived on time 73% of the time (361 flights, Jun 2025 to May 2026).
    • Departs inside DCA's trouble window: 63% of its 194 ground stops and delay programs started between 1 PM and 7 PM.

    Strong track record · 361 flights

    Find Delta 820 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

  • Delta Air Lines73%

    365 flights · 73% on time as flown · 1.1% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

  • 3 to 6 PM73%

    365 flights · avg delay 21 min

Best day: Saturday (82%). Worst: Wednesday (75%).

Smarter routing

Nearby airports that run more on time

  • IAD → SLC 82% chance on time

    Washington Dulles International Airport to Salt Lake City International Airport · 715 flights a year · 23 mi from your airports · yours: 73%

    Rank flightsFares

  • BWI → SLC 76% chance on time

    Baltimore/Washington International Thurgood Marshall Airport to Salt Lake City International Airport · 770 flights a year · 30 mi from your airports · yours: 73%

    Rank flightsFares

On time by month

All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.

J
73
F
78
M
74
A
78
M
74
J
73
J
72
A
85
S
87
O
89
N
93
D
84

What delays this route

  • Late-arriving aircraft45%
  • Air traffic control and airport volume30%
  • Airline (crew, maintenance, boarding)25%

Share of delay minutes by the cause airlines report to the US DOT.

Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure

Finding the most reliable connections from DCA to SLC…

DCA to SLC questions

Which airline is most on time from DCA to SLC?
Delta, with a season-adjusted 73% chance of operating and arriving on time over 365 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
What is the worst month for delays on DCA to SLC?
July (72% on time); the best was November (93%), averaged over Jun 2023 to May 2026.
Is this a prediction for my flight?
No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.

More routes from DCA

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Live status: FAA delays and ground stops