Route on-time record

BWI to RSW: most on-time flights and the best time to fly

Baltimore (Baltimore/Washington International Thurgood Marshall Airport) to Fort Myers (Southwest Florida International Airport). 1,452 nonstop flights in Jun 2025 to May 2026, 75% arrived within 15 minutes and 1.7% were cancelled. The most reliable flight number was Southwest 647 at 7:00 AM.

Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.

BWI → RSW

Baltimore to Fort Myers: 1,452 nonstop flights a year

On time (12 months)

75%

Cancelled

1.7%

avg delay 16 min

Best time to leave

Before 9 AM

86% on time vs 64% 6 to 9 PM

Most reliable airline

Southwest

74% chance on time

Check BWI to RSW fares

Lowest nonstop fare seen in the next two months: $429 (Southwest 4974 on 2026-10-22). 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 647
7:00 AM → 9:35 AM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1731; its record covers all of them.
86%
chance on time
On time (history)
90%
Cancelled
0.0%
Avg arrival delay
4 min
- Arrived on time 90% of the time (71 flights, Jun 2025 to May 2026).
- Never cancelled in 71 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 86% on time; 6 to 9 PM: 64%).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Moderate track record · 71 flights
Find Southwest 647 fares Opens this date on Aviasales
#2 · Southwest 4458
1:05 PM → 3:40 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-27.
77%
chance on time
On time (history)
88%
Cancelled
0.0%
Avg arrival delay
11 min
- Arrived on time 88% 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).
- Short track record (16 flights), so its score leans on the airline's record at this hour.
Limited track record · 16 flights
Find Southwest 4458 fares Opens this date on Aviasales
#3 · Southwest 874
9:40 AM → 12:20 PM2h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 1391; its record covers all of them.
77%
chance on time
On time (history)
79%
Cancelled
2.3%
Avg arrival delay
7 min
- Arrived on time 79% of the time (85 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).
Moderate track record · 85 flights
Find Southwest 874 fares Opens this date on Aviasales
#4 · Southwest 1866
2:45 PM → 5:20 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
76%
chance on time
On time (history)
79%
Cancelled
0.0%
Avg arrival delay
11 min
- Arrived on time 79% of the time (53 flights, Jun 2025 to May 2026).
- Never cancelled in 55 scheduled flights.
- Departs inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (53 flights), so its score leans on the airline's record at this hour.
Limited track record · 53 flights
Find Southwest 1866 fares Opens this date on Aviasales
#5 · Southwest 1733
1:50 PM → 4:25 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-04-06.
72%
chance on time
On time (history)
67%
Cancelled
4.3%
Avg arrival delay
14 min
- Arrived on time 67% of the time (21 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).
- Short track record (21 flights), so its score leans on the airline's record at this hour.
Limited track record · 21 flights
Find Southwest 1733 fares Opens this date on Aviasales
#6 · Southwest 2825
7:15 PM → 9:50 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-04-01.
69%
chance on time
On time (history)
63%
Cancelled
0.0%
Avg arrival delay
41 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: 64% on time; Before 9 AM: 86%).
- Departs 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 2825 fares Opens this date on Aviasales
#7 · Southwest 1296
8:15 PM → 10:50 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 2771; its record covers all of them.
66%
chance on time
On time (history)
69%
Cancelled
0.0%
Avg arrival delay
19 min
- Arrived on time 69% of the time (64 flights, Jun 2025 to May 2026).
- Never cancelled in 64 scheduled flights.
- Leaves in this route's least on-time window (6 to 9 PM: 64% on time; Before 9 AM: 86%).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
Moderate track record · 64 flights
Find Southwest 1296 fares Opens this date on Aviasales
#8 · Southwest 490
5:30 PM → 8:05 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-05-29.
65%
chance on time
On time (history)
68%
Cancelled
4.3%
Avg arrival delay
12 min
- Arrived on time 68% of the time (22 flights, Jun 2025 to May 2026).
- Departs inside BWI's trouble window: 81% of its 43 ground stops and delay programs started between 2 PM and 8 PM.
- 56% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (22 flights), so its score leans on the airline's record at this hour.
Limited track record · 22 flights
Find Southwest 490 fares Opens this date on Aviasales
#9 · Southwest 3309
8:45 PM → 11:20 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-04-03.
63%
chance on time
On time (history)
54%
Cancelled
7.1%
Avg arrival delay
47 min
- Arrived on time 54% of the time (13 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 64% on time; Before 9 AM: 86%).
- Departs outside BWI's trouble window (2 PM to 8 PM, when 81% of its 43 ground stops and delay programs started).
- 88% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 13 flights
Find Southwest 3309 fares Opens this date on Aviasales
#10 · Southwest 1734
6:20 PM → 8:55 PM2h 35m nonstop
Local times, typical schedule. Last flown 2026-04-06.
63%
chance on time
On time (history)
53%
Cancelled
3.0%
Avg arrival delay
29 min
- Arrived on time 53% of the time (32 flights, Jun 2025 to May 2026).
- Cancelled 3.0% of the time (1 of 33).
- Leaves in this route's least on-time window (6 to 9 PM: 64% on time; Before 9 AM: 86%).
- 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 · 32 flights
Find Southwest 1734 fares Opens this date on Aviasales

Airlines on this route

Season-adjusted chance of operating and arriving on time.

Southwest Airlines74%
1,452 flights · 75% on time as flown · 1.7% cancel

On time by departure time

All airlines, scheduled local departure, Jun 2025 to May 2026.

Before 9 AM86%
356 flights · avg delay 7 min
9 AM to noon79%
186 flights · avg delay 10 min
Noon to 3 PM79%
270 flights · avg delay 11 min
3 to 6 PM68%
267 flights · avg delay 24 min
6 to 9 PM64%
373 flights · avg delay 24 min

Best day: Tuesday (77%). Worst: Thursday (71%).

Smarter routing

Nearby airports that run more on time

IAD → RSW 88% chance on time
Washington Dulles International Airport to Southwest Florida International Airport · 468 flights a year · 45 mi from your airports · yours: 74%
Rank flights Fares

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 aircraft41%
Airline (crew, maintenance, boarding)34%
Air traffic control and airport volume18%
Severe weather6%
Security1%

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

Finding the most reliable connections from BWI to RSW…

BWI to RSW questions

What time of day is best to fly BWI to RSW?: Before 9 AM: 86% of flights arrived on time, against 64% 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 RSW?: Southwest, with a season-adjusted 74% chance of operating and arriving on time over 1,452 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 RSW?: July (61% on time); the best was November (83%), 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.

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