PDX to MIA flight delays & on-time performance
Nonstop flights from Portland International Airport to Miami International Airport · 2,700 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PDX or MIA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Portland (PDX) to Miami (MIA) arrived on time 84% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.9% were cancelled, and 4% arrived an hour or more late.
- American Airlines was the most punctual airline here (84% on time); Alaska Airlines was the least (84%).
- Departures scheduled around 10pm did best (85% on time); around 11pm did worst (81%).
- Thursday was the most reliable day to fly (91% on time) and Friday the least (78%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (35%).
Which airline is most on time from PDX to MIA?
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 |
|---|---|---|---|---|---|
| American Airlines | 84% | 1.0% | 10 min | 4.0% | 200 |
| Alaska Airlines | 84% | 0.7% | 13 min | 5.0% | 142 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am83%141 flights
- 10pm85%162 flights
- 11pm81%37 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday90%2.0% cancelled
- Tuesday88%0.0% cancelled
- Wednesday79%0.0% cancelled
- Thursday91%2.1% cancelled
- Friday78%0.0% cancelled
- Saturday82%0.0% cancelled
- Sunday80%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.
- Airline (crew, maintenance, cleaning, fueling)35%
- Late-arriving aircraft30%
- Extreme weather18%
- Air traffic control & airport congestion16%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather67%
- Airline (crew, maintenance, cleaning, fueling)33%
- Air traffic control & airport congestion0%
- Security0%
PDX to MIA: common questions
- How often are PDX to MIA flights on time?
- 84% 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 Portland to Miami cancelled?
- 0.9% of scheduled flights were cancelled (3 of 342).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 65 min behind schedule on average, and 4.4% of flights were an hour or more late.
- How long is taxi time at PDX?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MIA to PDX — 74% on time
More flights from Portland
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PDX → MIA, nonstop flights by US airlines that report to the DOT. How we calculate this.