ATIS Alerts Smart Flight Search
Find the flight least likely to be delayed
BetaWe rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.
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.
Best trips
9 nonstop, 16 with 1 connection. Best overall weighs the chance you arrive on time as booked, connection odds, travel time and separate tickets.
Best overall#1 · Nonstop · 1h 35m
7:40 AM → 9:15 AM
93%
arrive on time
94% on time · 1.6% cancel7:40 AM CHS → 9:15 AM BWI1h 35m
Southwest 1844
Boeing 737-700 · 17–22 yrs oldFind Southwest 1844 fares Opens this date on Aviasales#2 · Nonstop · 1h 30m
8:05 AM → 9:35 AM
91%
arrive on time
92% on time · 1.4% cancel8:05 AM CHS → 9:35 AM BWI1h 30m
Southwest 3652
Boeing 737-700 · 15–23 yrs oldFind Southwest 3652 fares Opens this date on Aviasales#3 · Nonstop · 1h 35m
10:55 AM → 12:30 PM
83%
arrive on time
85% on time · 1.5% cancel10:55 AM CHS → 12:30 PM BWI1h 35m
Southwest 1929
Boeing 737 MAX 8 or 737-700 · 1–22 yrs oldFind Southwest 1929 fares Opens this date on Aviasales#4 · Nonstop · 1h 30m
10:35 AM → 12:05 PM
83%
arrive on time
84% on time · 1.7% cancel10:35 AM CHS → 12:05 PM BWI1h 30m
Southwest 4599
Boeing 737-700 or 737 MAX 8 · 2–23 yrs oldFind Southwest 4599 fares Opens this date on Aviasales#5 · Nonstop · 1h 30m
2:10 PM → 3:40 PM
80%
arrive on time
82% on time · 1.8% cancel2:10 PM CHS → 3:40 PM BWI1h 30m
Southwest 2390
Boeing 737-700 · 15–20 yrs oldFind Southwest 2390 fares Opens this date on Aviasales#6 · Nonstop · 1h 45m
4:45 PM → 6:30 PM
80%
arrive on time
81% on time · 1.6% cancel4:45 PM CHS → 6:30 PM BWI1h 45m
Southwest 1587
Boeing 737-700 · 3–22 yrs oldFind Southwest 1587 fares Opens this date on Aviasales#7 · Nonstop · 1h 30m
4:30 PM → 6:00 PM
72%
arrive on time
73% on time · 1.8% cancel4:30 PM CHS → 6:00 PM BWI1h 30m
Southwest 1848
Boeing 737 MAX 8 · 1–8 yrs oldFind Southwest 1848 fares Opens this date on Aviasales#8 · Nonstop · 1h 35m
8:00 PM → 9:35 PM
71%
arrive on time
73% on time · 2.8% cancel8:00 PM CHS → 9:35 PM BWI1h 35m
Southwest 1849
Boeing 737 MAX 8 or 737-800 · 2–14 yrs oldFind Southwest 1849 fares Opens this date on Aviasales#9 · 1 connection · 4h 00m · one ticket (American)
5:00 AM → 9:00 AM
93%
connections made
79%
arrive on time
92% on time · 2.2% cancel5:00 AM CHS → 6:01 AM CLT1h 01m
American 3298 · also flew as 1731
Boeing 737-800 · 5–27 yrs oldConnect in CLT · 1h 29m · 96% chance to make it · same ticket: the airline rebooks you if you miss it85% on time · 1.3% cancel7:30 AM CLT → 9:00 AM BWI1h 30m
American 1929
Boeing 737-800 · 9–27 yrs oldFind this American trip Look for American 3298 + American 1929 on Aviasales#10 · 1 connection · 4h 26m · one ticket (American)
5:00 AM → 9:26 AM
93%
connections made
79%
arrive on time
92% on time · 2.2% cancel5:00 AM CHS → 6:01 AM CLT1h 01m
American 3298 · also flew as 1731
Boeing 737-800 · 5–27 yrs oldConnect in CLT · 1h 59m · 97% chance to make it · same ticket: the airline rebooks you if you miss it85% on time · 1.7% cancel8:00 AM CLT → 9:26 AM BWI1h 26m
American 1635
Airbus A319 · 13–27 yrs oldFind this American trip Look for American 3298 + American 1635 on Aviasales
Aircraft and ages come from the planes each flight number actually flew in the last 3 months of data (FAA registry build years); airlines can swap planes.
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%
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