Route on-time record
LAS to BWI: most on-time flights and the best time to fly
Las Vegas (Harry Reid International Airport) to Baltimore (Baltimore/Washington International Thurgood Marshall Airport). 1,841 nonstop flights in Jun 2025 to May 2026, 78% arrived within 15 minutes and 1.0% were cancelled. The most reliable flight number was Southwest 2563 at 6:45 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
LAS → BWI
Las Vegas to Baltimore: 1,841 nonstop flights a year
On time (12 months)
78%
Cancelled
1.0%
avg delay 12 min
Best time to leave
Before 9 AM
90% on time vs 61% 3 to 6 PM
Most reliable airline
Southwest
78% chance on time
Lowest nonstop fare seen in the next two months: $184 (Southwest 1579 on 2026-11-14). 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 · Southwest 2563
6:45 AM → 2:15 PM4h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
- On time (history)
- 95%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 95% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 90% on time; 3 to 6 PM: 61%).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).
Limited track record · 55 flights
Find Southwest 2563 fares Opens this date on Aviasales#2 · Southwest 1673
10:15 PM → 5:45 AM4h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 87%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 87% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).
Limited track record · 55 flights
Find Southwest 1673 fares Opens this date on Aviasales#3 · Southwest 3828
10:30 AM → 6:10 PM4h 40m nonstop
Local times, typical schedule. Last flown 2026-05-27.
81%
chance on time
- On time (history)
- 92%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 92% of the time (13 flights, Jun 2025 to May 2026).
- Departs inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.
- Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
Limited track record · 13 flights
Find Southwest 3828 fares Opens this date on Aviasales#4 · Southwest 1104
9:35 AM → 5:15 PM4h 40m nonstop
Local times, typical schedule. Last flown 2026-05-29.
79%
chance on time
- On time (history)
- 78%
- Cancelled
- 0.0%
- Avg arrival delay
- 23 min
- Arrived on time 78% of the time (23 flights, Jun 2025 to May 2026).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).
- Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- 80% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 23 flights
Find Southwest 1104 fares Opens this date on Aviasales#5 · Southwest 1989
12:05 PM → 7:40 PM4h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
71%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 31 min
- Arrived on time 63% of the time (8 flights, Jun 2025 to May 2026).
- Departs inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.
- Lands 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 1989 fares Opens this date on Aviasales#6 · Southwest 2566
4:15 PM → 11:55 PM4h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
67%
chance on time
- On time (history)
- 61%
- Cancelled
- 0.0%
- Avg arrival delay
- 23 min
- Arrived on time 61% of the time (54 flights, Jun 2025 to May 2026).
- Never cancelled in 54 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 61% on time; Before 9 AM: 90%).
- Departs outside LAS's trouble window (10 AM to 4 PM, when 51% of its 107 ground stops and delay programs started).
Limited track record · 54 flights
Find Southwest 2566 fares Opens this date on Aviasales#7 · Southwest 684
2:20 PM → 9:55 PM4h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
58%
chance on time
- On time (history)
- 50%
- Cancelled
- 1.5%
- Avg arrival delay
- 22 min
- Arrived on time 50% of the time (66 flights, Jun 2025 to May 2026).
- Departs inside LAS's trouble window: 51% of its 107 ground stops and delay programs started between 10 AM and 4 PM.
Moderate track record · 66 flights
Find Southwest 684 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines78%
1,632 flights · 79% on time as flown · 1.0% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM90%
471 flights · avg delay 4 min
- 9 AM to noon82%
278 flights · avg delay 11 min
- Noon to 3 PM64%
300 flights · avg delay 18 min
- 3 to 6 PM61%
199 flights · avg delay 23 min
- 6 to 9 PM69%
127 flights · avg delay 22 min
- After 9 PM83%
466 flights · avg delay 10 min
Best day: Saturday (87%). Worst: Friday (73%).
Smarter routing
Nearby airports that run more on time
LAS → IAD 87% chance on time
Harry Reid International Airport to Washington Dulles International Airport · 1,130 flights a year · 45 mi from your airports · yours: 77%
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)44%
- Late-arriving aircraft38%
- Air traffic control and airport volume16%
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
LAS to BWI questions
- What time of day is best to fly LAS to BWI?
- Before 9 AM: 90% of flights arrived on time, against 61% for departures 3 to 6 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 LAS to BWI?
- Southwest, with a season-adjusted 78% chance of operating and arriving on time over 1,632 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 LAS to BWI?
- July (67% on time); the best was February (87%), 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 LAS
- BWI to LAS (return)
- LAS to LAX 79%
- LAS to DEN 77%
- LAS to SAN 68%
- LAS to PHX 78%
- LAS to SFO 66%
- LAS to SEA 82%
- LAS to ORD 77%
- LAS to DFW 81%
- LAS to ATL 84%
- LAS to SNA 82%
- LAS to SMF 79%
- LAS to BUR 80%
Most on-time flights from LAS on every route →
Live status: FAA delays and ground stops