Route on-time record
RDU to BWI: most on-time flights and the best time to fly
Raleigh/Durham (Raleigh-Durham International Airport) to Baltimore (Baltimore/Washington International Thurgood Marshall Airport). 1,811 nonstop flights in Jun 2025 to May 2026, 85% arrived within 15 minutes and 2.4% were cancelled. The most reliable flight number was Southwest 2577 at 6:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
RDU → BWI
Raleigh/Durham to Baltimore: 1,811 nonstop flights a year
On time (12 months)
85%
Cancelled
2.4%
avg delay 10 min
Best time to leave
Before 9 AM
96% on time vs 69% 6 to 9 PM
Most reliable airline
Southwest
83% 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 · Southwest 2577
6:00 AM → 7:05 AM1h 05m nonstop
Local times, typical schedule. Last flown 2026-04-06.
93%
chance on time
- On time (history)
- 97%
- Cancelled
- 3.0%
- Avg arrival delay
- 4 min
- Arrived on time 97% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- Leaves in this route's most on-time window (Before 9 AM: 96% on time; 6 to 9 PM: 69%).
- Departs outside RDU's trouble window (11 AM to 5 PM, when 57% of its 14 ground stops and delay programs started).
Limited track record · 32 flights
Find Southwest 2577 fares Opens this date on Aviasales#2 · Southwest 3984
5:35 AM → 6:45 AM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
92%
chance on time
- On time (history)
- 96%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 96% 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: 96% on time; 6 to 9 PM: 69%).
- Departs outside RDU's trouble window (11 AM to 5 PM, when 57% of its 14 ground stops and delay programs started).
Limited track record · 55 flights
Find Southwest 3984 fares Opens this date on Aviasales#3 · Southwest 3985
10:10 AM → 11:20 AM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 590; its record covers all of them.
90%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 3 min
- Arrived on time 93% of the time (87 flights, Jun 2025 to May 2026).
- Never cancelled in 87 scheduled flights.
- Departs outside RDU's trouble window (11 AM to 5 PM, when 57% of its 14 ground stops and delay programs started).
Moderate track record · 87 flights
Find Southwest 3985 fares Opens this date on Aviasales#4 · Southwest 3986
2:00 PM → 3:10 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 93%
- Cancelled
- 0.0%
- Avg arrival delay
- 13 min
- Arrived on time 93% of the time (46 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- Departs inside RDU's trouble window: 57% of its 14 ground stops and delay programs started between 11 AM and 5 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 · 46 flights
Find Southwest 3986 fares Opens this date on Aviasales#5 · Southwest 2223
12:00 PM → 1:10 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-04-01.
87%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (8 flights, Jun 2025 to May 2026).
- Departs inside RDU's trouble window: 57% of its 14 ground stops and delay programs started between 11 AM and 5 PM.
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find Southwest 2223 fares Opens this date on Aviasales#6 · Southwest 1283
4:50 PM → 6:05 PM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-30.
84%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 15 min
- Arrived on time 91% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- Departs inside RDU's trouble window: 57% of its 14 ground stops and delay programs started between 11 AM and 5 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 · 47 flights
Find Southwest 1283 fares Opens this date on Aviasales#7 · Southwest 187
12:45 PM → 1:55 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-04-06.
83%
chance on time
- On time (history)
- 80%
- Cancelled
- 0.0%
- Avg arrival delay
- 21 min
- Arrived on time 80% of the time (15 flights, Jun 2025 to May 2026).
- Departs inside RDU's trouble window: 57% of its 14 ground stops and delay programs started between 11 AM and 5 PM.
- 55% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (15 flights), so its score leans on the airline's record at this hour.
Limited track record · 15 flights
Find Southwest 187 fares Opens this date on Aviasales#8 · Southwest 1481
7:50 PM → 9:05 PM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 14 min
- Arrived on time 82% of the time (55 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 69% on time; Before 9 AM: 96%).
- Departs outside RDU's trouble window (11 AM to 5 PM, when 57% of its 14 ground stops and delay programs started).
Limited track record · 55 flights
Find Southwest 1481 fares Opens this date on Aviasales#9 · Southwest 3890
7:25 PM → 8:35 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-04-01.
72%
chance on time
- On time (history)
- 50%
- Cancelled
- 0.0%
- Avg arrival delay
- 22 min
- Arrived on time 50% of the time (8 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 69% on time; Before 9 AM: 96%).
- Departs outside RDU's trouble window (11 AM to 5 PM, when 57% of its 14 ground stops and delay programs started).
- 77% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 8 flights
Find Southwest 3890 fares Opens this date on Aviasales#10 · Southwest 1078
5:50 PM → 7:00 PM1h 10m nonstop
Local times, typical schedule. Last flown 2026-04-06.
72%
chance on time
- On time (history)
- 67%
- Cancelled
- 3.6%
- Avg arrival delay
- 18 min
- Arrived on time 67% of the time (27 flights, Jun 2025 to May 2026).
- Departs outside RDU's trouble window (11 AM to 5 PM, when 57% of its 14 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.
- 54% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 27 flights
Find Southwest 1078 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines83%
1,790 flights · 85% on time as flown · 2.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM96%
465 flights · avg delay 4 min
- 9 AM to noon94%
295 flights · avg delay 3 min
- Noon to 3 PM90%
312 flights · avg delay 8 min
- 3 to 6 PM78%
344 flights · avg delay 18 min
- 6 to 9 PM69%
395 flights · avg delay 19 min
Best day: Saturday (89%). Worst: Sunday (81%).
Smarter routing
Nearby airports that run more on time
RDU → IAD 85% chance on time
Raleigh-Durham International Airport to Washington Dulles International Airport · 1,335 flights a year · 45 mi from your airports · yours: 83%
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
- Late-arriving aircraft51%
- Air traffic control and airport volume28%
- Airline (crew, maintenance, boarding)19%
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
RDU to BWI questions
- What time of day is best to fly RDU to BWI?
- Before 9 AM: 96% of flights arrived on time, against 69% 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 RDU to BWI?
- Southwest, with a season-adjusted 83% chance of operating and arriving on time over 1,790 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 RDU to BWI?
- July (71% 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 RDU
- BWI to RDU (return)
- RDU to ATL 87%
- RDU to ORD 74%
- RDU to CLT 82%
- RDU to BOS 78%
- RDU to LGA 69%
- RDU to MCO 78%
- RDU to PHL 73%
- RDU to JFK 75%
- RDU to MIA 76%
- RDU to DFW 77%
- RDU to BNA 80%
- RDU to EWR 74%
Live status: FAA delays and ground stops