MIA to PDX flight delays & on-time performance
Nonstop flights from Miami International Airport to Portland International Airport · 2,700 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MIA or PDX right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Miami (MIA) to Portland (PDX) arrived on time 74% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.5% were cancelled, and 10% arrived an hour or more late.
- Alaska Airlines was the most punctual airline here (82% on time); American Airlines was the least (69%).
- Departures scheduled around 4pm did best (83% on time); around 7pm did worst (59%).
- Thursday was the most reliable day to fly (85% on time) and Sunday the least (64%).
- The largest source of delay minutes was late-arriving aircraft (49%).
Which airline is most on time from MIA to PDX?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Alaska Airlines | 82% | 1.4% | 17 min | 8.1% | 141 |
| American Airlines | 69% | 1.5% | 27 min | 11.2% | 200 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 4pm83%125 flights
- 5pm73%16 flights
- 7pm59%88 flights
- 8pm76%91 flights
- 9pm75%20 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday71%2.0% cancelled
- Tuesday84%2.0% cancelled
- Wednesday73%0.0% cancelled
- Thursday85%4.2% cancelled
- Friday73%0.0% cancelled
- Saturday68%0.0% cancelled
- Sunday64%2.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft49%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion14%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather60%
- Airline (crew, maintenance, cleaning, fueling)40%
- Air traffic control & airport congestion0%
- Security0%
MIA to PDX: common questions
- How often are MIA to PDX flights on time?
- 74% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Miami to Portland cancelled?
- 1.5% of scheduled flights were cancelled (5 of 341).
- How long are typical delays?
- Across all flights the average arrival delay was 23 min (early arrivals count as zero). Flights that were late arrived 82 min behind schedule on average, and 9.9% of flights were an hour or more late.
- How long is taxi time at MIA?
- Flights on this route spent 25 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PDX to MIA — 84% on time
More flights from Miami
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MIA → PDX, nonstop flights by US airlines that report to the DOT. How we calculate this.