Route Reliability
Denver → Portland
DEN–PDX · 991 miles · Denver International Airport to Portland International Airport
- 75%
- Arrive within 15 minutes
- 9 min
- Average arrival delay
- 0.5%
- Cancelled
- 4,297
- Flights in the data
Data through May 2026.
Who flies it best
Ranked by on-time arrivals. Historical results, not predictions.
- 1.United Airlines83%1,822 flights
- 2.Frontier Airlines78%337 flights
- 3.Alaska Airlines76%565 flights
- 4.Southwest Airlines66%1,573 flights
What the data says
Morning flights do better here.
DEN–PDX flights departing between 6–9 AM arrived on time 88% of the time, versus 61% between 9 PM–12 AM.
Thursday is the weak spot.
DEN–PDX flights arrived on time 81% of the time on Saturdays. On Thursdays: 71%.
United Airlines has a clear lead on this route.
United Airlines arrived on time 83% of the time on this route; Southwest Airlines managed 66%.
Best historical flights
Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.
Top flights by on-time rate
More flights on this route
The breakdown
- Mon74%(645 flights)
- Tue78%(568 flights)
- Wed74%(574 flights)
- Thu71%(648 flights)
- Fri75%(653 flights)
- Sat81%(534 flights)
- Sun75%(652 flights)
- 12–3 AM—(2 flights)
- 6–9 AM88%(882 flights)
- 9 AM–12 PM85%(907 flights)
- 12–3 PM76%(409 flights)
- 3–6 PM74%(568 flights)
- 6–9 PM63%(1073 flights)
- 9 PM–12 AM61%(433 flights)
Jun 66% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 66% | 441 |
| July 2025 | 65% | 450 |
| August 2025 | 72% | 436 |
| September 2025 | 83% | 395 |
| October 2025 | 77% | 393 |
| November 2025 | 81% | 339 |
| December 2025 | 67% | 344 |
| January 2026 | 84% | 268 |
| February 2026 | 80% | 245 |
| March 2026 | 71% | 294 |
| April 2026 | 86% | 303 |
| May 2026 | 80% | 366 |
Keep nerding
Based on 4,297 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.