Route on-time record
CHS to BWI: most on-time flights and the best time to fly
Charleston (Charleston International Airport) to Baltimore (Baltimore/Washington International Thurgood Marshall Airport). 1,252 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 1.9% were cancelled. The most reliable flight number was Southwest 1844 at 7:40 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
CHS → BWI
Charleston to Baltimore: 1,252 nonstop flights a year
On time (12 months)
82%
Cancelled
1.9%
avg delay 10 min
Best time to leave
Before 9 AM
94% on time vs 70% 3 to 6 PM
Most reliable airline
Southwest
81% chance on time
Lowest nonstop fare seen in the next two months: $138 (Southwest 508 on 2026-11-17). 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 1844
7:40 AM → 9:15 AM1h 35m nonstop
Local times, typical schedule. Last flown 2026-04-06.
93%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (33 flights, Jun 2025 to May 2026).
- Never cancelled in 33 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 94% on time; 3 to 6 PM: 70%).
- Short track record (33 flights), so its score leans on the airline's record at this hour.
Limited track record · 33 flights
Find Southwest 1844 fares Opens this date on Aviasales#2 · Southwest 3652
8:05 AM → 9:35 AM1h 30m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
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: 94% on time; 3 to 6 PM: 70%).
- Short track record (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find Southwest 3652 fares Opens this date on Aviasales#3 · Southwest 1929
10:55 AM → 12:30 PM1h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 85% of the time (46 flights, Jun 2025 to May 2026).
- Never cancelled in 46 scheduled flights.
- Short track record (46 flights), so its score leans on the airline's record at this hour.
Limited track record · 46 flights
Find Southwest 1929 fares Opens this date on Aviasales#4 · Southwest 4599
10:35 AM → 12:05 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
83%
chance on time
- On time (history)
- 85%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 85% of the time (20 flights, Jun 2025 to May 2026).
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find Southwest 4599 fares Opens this date on Aviasales#5 · Southwest 2390
2:10 PM → 3:40 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-04-01.
80%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 75% of the time (8 flights, Jun 2025 to May 2026).
- Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 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 2390 fares Opens this date on Aviasales#6 · Southwest 1587
4:45 PM → 6:30 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31.
80%
chance on time
- On time (history)
- 86%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 86% of the time (37 flights, Jun 2025 to May 2026).
- Never cancelled in 37 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 70% on time; Before 9 AM: 94%).
- 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 · 37 flights
Find Southwest 1587 fares Opens this date on Aviasales#7 · Southwest 1848
4:30 PM → 6:00 PM1h 30m nonstop
Local times, typical schedule. Last flown 2026-04-06.
72%
chance on time
- On time (history)
- 64%
- Cancelled
- 0.0%
- Avg arrival delay
- 21 min
- Arrived on time 64% of the time (14 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 70% on time; Before 9 AM: 94%).
- Lands inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- 64% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 14 flights
Find Southwest 1848 fares Opens this date on Aviasales#8 · Southwest 1849
8:00 PM → 9:35 PM1h 35m nonstop
Local times, typical schedule. Last flown 2026-04-06.
71%
chance on time
- On time (history)
- 71%
- Cancelled
- 8.7%
- Avg arrival delay
- 19 min
- Arrived on time 71% of the time (21 flights, Jun 2025 to May 2026).
- 68% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find Southwest 1849 fares Opens this date on Aviasales#9 · Southwest 2708
7:00 PM → 8:40 PM1h 40m nonstop
Local times, typical schedule. Last flown 2026-05-30.
64%
chance on time
- On time (history)
- 57%
- Cancelled
- 0.0%
- Avg arrival delay
- 20 min
- Arrived on time 57% of the time (47 flights, Jun 2025 to May 2026).
- Never cancelled in 47 scheduled flights.
- 60% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (47 flights), so its score leans on the airline's record at this hour.
Limited track record · 47 flights
Find Southwest 2708 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines81%
1,231 flights · 82% on time as flown · 1.9% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM94%
365 flights · avg delay 4 min
- 9 AM to noon88%
225 flights · avg delay 6 min
- Noon to 3 PM87%
136 flights · avg delay 8 min
- 3 to 6 PM70%
202 flights · avg delay 17 min
- 6 to 9 PM70%
324 flights · avg delay 16 min
Best day: Wednesday (86%). Worst: Friday (80%).
Smarter routing
Nearby airports that run more on time
CHS → IAD 84% chance on time
Charleston International Airport to Washington Dulles International Airport · 759 flights a year · 45 mi from your airports · yours: 81%
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 aircraft53%
- Airline (crew, maintenance, boarding)24%
- Air traffic control and airport volume20%
- Severe weather3%
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
CHS to BWI questions
- What time of day is best to fly CHS to BWI?
- Before 9 AM: 94% of flights arrived on time, against 70% 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 CHS to BWI?
- Southwest, with a season-adjusted 81% chance of operating and arriving on time over 1,231 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 CHS to BWI?
- July (70% on time); the best was February (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 CHS
- BWI to CHS (return)
- CHS to ATL 89%
- CHS to CLT 83%
- CHS to ORD 77%
- CHS to DCA 72%
- CHS to LGA 74%
- CHS to EWR 79%
- CHS to DFW 80%
- CHS to PHL 78%
- CHS to BOS 71%
- CHS to MIA 79%
- CHS to BNA 81%
- CHS to JFK 73%
Live status: FAA delays and ground stops