Route on-time record
BWI to SLC: most on-time flights and the best time to fly
Baltimore (Baltimore/Washington International Thurgood Marshall Airport) to Salt Lake City (Salt Lake City International Airport). 770 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 1.6% were cancelled. The most reliable flight number was Delta 1176 at 7:01 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
BWI → SLC
Baltimore to Salt Lake City: 770 nonstop flights a year
On time (12 months)
78%
Cancelled
1.6%
avg delay 14 min
Best time to leave
Before 9 AM
83% on time vs 59% 6 to 9 PM
Most reliable airline
Delta
80% chance on time
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 · Delta 1176
7:01 AM → 9:58 AM4h 52m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
- On time (history)
- 81%
- Cancelled
- 1.7%
- Avg arrival delay
- 14 min
- Arrived on time 81% of the time (354 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 83% on time; 6 to 9 PM: 59%).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Strong track record · 354 flights
Find Delta 1176 fares Opens this date on Aviasales#2 · Southwest 1325
1:00 PM → 3:45 PM4h 45m nonstop
Local times, typical schedule. Last flown 2026-05-29.
75%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 6 min
- Arrived on time 82% of the time (22 flights, Jun 2025 to May 2026).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Limited track record · 22 flights
Find Southwest 1325 fares Opens this date on Aviasales#3 · Southwest 1335
9:50 AM → 12:40 PM4h 50m nonstop
Local times, typical schedule. Last flown 2026-05-27.
69%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 min
- Arrived on time 63% of the time (16 flights, Jun 2025 to May 2026).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Limited track record · 16 flights
Find Southwest 1335 fares Opens this date on Aviasales#4 · Southwest 2475
7:20 PM → 10:10 PM4h 50m nonstop
Local times, typical schedule. Last flown 2026-05-30.
68%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 14 min
- Arrived on time 63% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 59% on time; Before 9 AM: 83%).
- Departs inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 8 flights
Find Southwest 2475 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines80%
360 flights · 81% on time as flown · 1.6% cancel
- Southwest Airlines74%
410 flights · 74% on time as flown · 1.5% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM83%
427 flights · avg delay 13 min
- 9 AM to noon77%
105 flights · avg delay 11 min
- Noon to 3 PM74%
143 flights · avg delay 15 min
- 6 to 9 PM59%
89 flights · avg delay 24 min
Best day: Tuesday (87%). Worst: Saturday (70%).
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 · 45 mi from your airports · yours: 76%
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.
What delays this route
- Airline (crew, maintenance, boarding)56%
- Late-arriving aircraft23%
- Air traffic control and airport volume19%
- Severe weather2%
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
BWI to SLC questions
- What time of day is best to fly BWI to SLC?
- Before 9 AM: 83% of flights arrived on time, against 59% for departures 6 to 9 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from BWI to SLC?
- Delta, with a season-adjusted 80% chance of operating and arriving on time over 360 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 BWI to SLC?
- June (69% on time); the best was October (89%), 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 BWI
- SLC to BWI (return)
- BWI to ATL 79%
- BWI to MCO 75%
- BWI to BOS 74%
- BWI to FLL 75%
- BWI to CLT 80%
- BWI to DEN 76%
- BWI to TPA 79%
- BWI to ORD 75%
- BWI to MIA 74%
- BWI to DTW 81%
- BWI to PVD 78%
- BWI to BNA 80%
Most on-time flights from BWI on every route →
Live status: FAA delays and ground stops