Route on-time record
RSW to DEN: most on-time flights and the best time to fly
Fort Myers (Southwest Florida International Airport) to Denver (Denver International Airport). 1,116 nonstop flights in Jun 2025 to May 2026, 81% arrived within 15 minutes and 0.4% were cancelled. The most reliable flight number was United 318 at 8:01 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
RSW → DEN
Fort Myers to Denver: 1,116 nonstop flights a year
On time (12 months)
81%
Cancelled
0.4%
avg delay 14 min
Best time to leave
Before 9 AM
97% on time vs 71% 3 to 6 PM
Most reliable airline
United
83% chance on time
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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 · United 318
8:01 AM → 10:30 AM4h 29m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as United 1029, 2082; its record covers all of them.
95%
chance on time
- On time (history)
- 97%
- Cancelled
- 0.0%
- Avg arrival delay
- 1 min
- Arrived on time 97% of the time (86 flights, Jun 2025 to May 2026).
- Never cancelled in 86 scheduled flights.
- Leaves in this route's most on-time window (Before 9 AM: 97% on time; 3 to 6 PM: 71%).
Moderate track record · 86 flights
Find United 318 fares Opens this date on Aviasales#2 · United 1254
11:31 AM → 2:00 PM4h 29m nonstop
Local times, typical schedule. Last flown 2026-03-28.
88%
chance on time
- On time (history)
- 92%
- Cancelled
- 0.0%
- Avg arrival delay
- 26 min
- Arrived on time 92% of the time (24 flights, Jun 2025 to May 2026).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (24 flights), so its score leans on the airline's record at this hour.
Limited track record · 24 flights
Find United 1254 fares Opens this date on Aviasales#3 · Southwest 130
7:35 AM → 9:45 AM4h 10m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 4 min
- Arrived on time 91% 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: 97% on time; 3 to 6 PM: 71%).
- Short track record (55 flights), so its score leans on the airline's record at this hour.
Limited track record · 55 flights
Find Southwest 130 fares Opens this date on Aviasales#4 · United 1924
8:45 PM → 11:14 PM4h 29m nonstop
Local times, typical schedule. Last flown 2026-03-28.
80%
chance on time
- On time (history)
- 63%
- Cancelled
- 0.0%
- Avg arrival delay
- 36 min
- Arrived on time 63% of the time (8 flights, Jun 2025 to May 2026).
- Short track record (8 flights), so its score leans on the airline's record at this hour.
Limited track record · 8 flights
Find United 1924 fares Opens this date on Aviasales#5 · United 1704
3:43 PM → 6:08 PM4h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
79%
chance on time
- On time (history)
- 82%
- Cancelled
- 1.6%
- Avg arrival delay
- 11 min
- Arrived on time 82% of the time (62 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 71% on time; Before 9 AM: 97%).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Moderate track record · 62 flights
Find United 1704 fares Opens this date on Aviasales#6 · United 1884
3:55 PM → 6:24 PM4h 29m nonstop
Local times, typical schedule. Last flown 2026-03-28.
73%
chance on time
- On time (history)
- 70%
- Cancelled
- 0.0%
- Avg arrival delay
- 22 min
- Arrived on time 70% of the time (210 flights, Jun 2025 to May 2026).
- Never cancelled in 211 scheduled flights.
- Leaves in this route's least on-time window (3 to 6 PM: 71% on time; Before 9 AM: 97%).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
Strong track record · 210 flights
Find United 1884 fares Opens this date on Aviasales#7 · Southwest 2770
10:40 AM → 1:00 PM4h 20m nonstop
Local times, typical schedule. Last flown 2026-04-06.
73%
chance on time
- On time (history)
- 68%
- Cancelled
- 0.0%
- Avg arrival delay
- 31 min
- Arrived on time 68% of the time (28 flights, Jun 2025 to May 2026).
- Short track record (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find Southwest 2770 fares Opens this date on Aviasales#8 · Frontier 3803
5:28 PM → 7:57 PM4h 29m nonstop
Local times, typical schedule. Last flown 2026-05-18.
69%
chance on time
- On time (history)
- 72%
- Cancelled
- 1.7%
- Avg arrival delay
- 28 min
- Arrived on time 72% of the time (57 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (3 to 6 PM: 71% on time; Before 9 AM: 97%).
- Lands inside DEN's trouble window: 79% of its 174 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (57 flights), so its score leans on the airline's record at this hour.
Limited track record · 57 flights
Find Frontier 3803 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- United Airlines83%
743 flights · 84% on time as flown · 0.3% cancel
- Southwest Airlines76%
315 flights · 75% on time as flown · 0.3% cancel
- Frontier Airlines76%
58 flights · 72% on time as flown · 0.7% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM97%
322 flights · avg delay 3 min
- 9 AM to noon85%
141 flights · avg delay 13 min
- Noon to 3 PM75%
138 flights · avg delay 15 min
- 3 to 6 PM71%
480 flights · avg delay 22 min
- 6 to 9 PM83%
35 flights · avg delay 14 min
Best day: Thursday (84%). Worst: Saturday (73%).
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%
- Air traffic control and airport volume30%
- Airline (crew, maintenance, boarding)22%
- Severe weather7%
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
RSW to DEN questions
- What time of day is best to fly RSW to DEN?
- Before 9 AM: 97% of flights arrived on time, against 71% 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 RSW to DEN?
- United, with a season-adjusted 83% chance of operating and arriving on time over 743 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 RSW to DEN?
- July (61% on time); the best was October (90%), 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 RSW
- DEN to RSW (return)
- RSW to ORD 76%
- RSW to ATL 85%
- RSW to BOS 69%
- RSW to EWR 80%
- RSW to DTW 75%
- RSW to CLT 83%
- RSW to BWI 80%
- RSW to DFW 75%
- RSW to PHL 72%
- RSW to JFK 78%
- RSW to MSP 81%
- RSW to MDW 76%
Live status: FAA delays and ground stops