Route on-time record
TUL to DEN: most on-time flights and the best time to fly
Tulsa (Tulsa International Airport) to Denver (Denver International Airport). 2,410 nonstop flights in Jun 2025 to May 2026, 79% arrived within 15 minutes and 1.0% were cancelled. The most reliable flight number was SkyWest 5667 at 5:45 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
TUL → DEN
Tulsa to Denver: 2,410 nonstop flights a year
On time (12 months)
79%
Cancelled
1.0%
avg delay 15 min
Best time to leave
Before 9 AM
92% on time vs 62% 3 to 6 PM
Most reliable airline
Southwest
81% chance on time
Lowest nonstop fare seen in the next two months: $228 (United 5673 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 · SkyWest 5667 · sold as United Express, Delta Connection, American Eagle or Alaska
5:45 AM → 6:49 AM2h 04m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
- On time (history)
- 92%
- Cancelled
- 0.6%
- Avg arrival delay
- 12 min
- Arrived on time 92% of the time (360 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 62%).
Strong track record · 360 flights
Find 5:45 AM flight fares Opens this date on Aviasales#2 · Southwest 1596
6:55 AM → 7:40 AM1h 45m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Southwest 3120; its record covers all of them.
89%
chance on time
- On time (history)
- 90%
- Cancelled
- 1.1%
- Avg arrival delay
- 6 min
- Arrived on time 90% of the time (87 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 92% on time; 3 to 6 PM: 62%).
Moderate track record · 87 flights
Find Southwest 1596 fares Opens this date on Aviasales#3 · SkyWest 5276 · sold as United Express, Delta Connection, American Eagle or Alaska
11:53 AM → 1:04 PM2h 03m nonstop
Local times, typical schedule. Last flown 2026-05-31.
83%
chance on time
- On time (history)
- 83%
- Cancelled
- 0.3%
- Avg arrival delay
- 14 min
- Arrived on time 83% of the time (330 flights, Jun 2025 to May 2026).
Strong track record · 330 flights
Find 11:53 AM flight fares Opens this date on Aviasales#4 · Southwest 662
6:00 PM → 6:45 PM1h 45m nonstop
Local times, typical schedule. Last flown 2026-04-05.
83%
chance on time
- On time (history)
- 92%
- Cancelled
- 7.7%
- Avg arrival delay
- 5 min
- Arrived on time 92% of the time (12 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 (12 flights), so its score leans on the airline's record at this hour.
Limited track record · 12 flights
Find Southwest 662 fares Opens this date on Aviasales#5 · Southwest 887
6:35 PM → 7:25 PM1h 50m nonstop
Local times, typical schedule. Last flown 2026-05-31.
81%
chance on time
- On time (history)
- 81%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 81% of the time (31 flights, Jun 2025 to May 2026).
- Never cancelled in 31 scheduled flights.
- Lands inside DEN's trouble window: 79% of its 174 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.
Limited track record · 31 flights
Find Southwest 887 fares Opens this date on Aviasales#6 · SkyWest 5821 · sold as United Express, Delta Connection, American Eagle or Alaska
11:42 AM → 12:45 PM2h 03m nonstop
Local times, typical schedule. Last flown 2026-04-29.
77%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.0%
- Avg arrival delay
- 15 min
- Arrived on time 71% of the time (28 flights, Jun 2025 to May 2026).
- 51% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (28 flights), so its score leans on the airline's record at this hour.
Limited track record · 28 flights
Find 11:42 AM flight fares Opens this date on Aviasales#7 · United 1320
9:15 AM → 10:21 AM2h 06m nonstop
Local times, typical schedule. Last flown 2026-03-28.
74%
chance on time
- On time (history)
- 78%
- Cancelled
- 2.6%
- Avg arrival delay
- 11 min
- Arrived on time 78% of the time (37 flights, Jun 2025 to May 2026).
- Short track record (37 flights), so its score leans on the airline's record at this hour.
Limited track record · 37 flights
Find United 1320 fares Opens this date on Aviasales#8 · United 2154
9:05 AM → 9:59 AM1h 54m nonstop
Local times, typical schedule. Last flown 2026-05-20. Same departure also flew as United 1714, 448; its record covers all of them.
73%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 75% of the time (52 flights, Jun 2025 to May 2026).
- Never cancelled in 52 scheduled flights.
- Short track record (52 flights), so its score leans on the airline's record at this hour.
Limited track record · 52 flights
Find United 2154 fares Opens this date on Aviasales#9 · United 1029
9:22 AM → 10:10 AM1h 48m nonstop
Local times, typical schedule. Last flown 2026-05-31.
72%
chance on time
- On time (history)
- 73%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 73% of the time (11 flights, Jun 2025 to May 2026).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find United 1029 fares Opens this date on Aviasales#10 · Frontier 1587
8:30 PM → 9:30 PM2h 00m nonstop
Local times, typical schedule. Last flown 2026-04-12.
71%
chance on time
- On time (history)
- 74%
- Cancelled
- 0.0%
- Avg arrival delay
- 18 min
- Arrived on time 74% of the time (42 flights, Jun 2025 to May 2026).
- Never cancelled in 42 scheduled flights.
- 67% of its delay minutes came from the plane arriving late from an earlier flight.
- Short track record (42 flights), so its score leans on the airline's record at this hour.
Limited track record · 42 flights
Find Frontier 1587 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Southwest Airlines81%
896 flights · 82% on time as flown · 1.1% cancel
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)78%
1,107 flights · 79% on time as flown · 0.9% cancel
- United Airlines75%
365 flights · 76% on time as flown · 1.1% cancel
- Frontier Airlines75%
42 flights · 74% on time as flown · 0.8% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM92%
741 flights · avg delay 9 min
- 9 AM to noon79%
756 flights · avg delay 13 min
- Noon to 3 PM79%
146 flights · avg delay 13 min
- 3 to 6 PM62%
393 flights · avg delay 30 min
- 6 to 9 PM71%
341 flights · avg delay 19 min
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
- Air traffic control and airport volume38%
- Airline (crew, maintenance, boarding)30%
- Late-arriving aircraft23%
- Severe weather9%
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
TUL to DEN questions
- What time of day is best to fly TUL to DEN?
- Before 9 AM: 92% of flights arrived on time, against 62% 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 TUL to DEN?
- Southwest, with a season-adjusted 81% chance of operating and arriving on time over 896 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 TUL to DEN?
- May (73% on time); the best was November (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 TUL
- DEN to TUL (return)
- TUL to DFW 78%
- TUL to ORD 76%
- TUL to ATL 86%
- TUL to PHX 82%
- TUL to IAH 84%
- TUL to DAL 86%
- TUL to LAS 83%
- TUL to CLT 85%
- TUL to HOU 86%
- TUL to LGA 79%
- TUL to STL 89%
- TUL to SLC 92%
Live status: FAA delays and ground stops