ATL to PWM flight delays & on-time performance
Nonstop flights from Hartsfield Jackson Atlanta International Airport to Portland International Jetport · 1,027 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ATL or PWM right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Atlanta (ATL) to Portland (PWM) arrived on time 75% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1.1% were cancelled, and 7% arrived an hour or more late.
- Delta Air Lines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 9am did best (91% on time); around 3pm did worst (55%).
- Tuesday was the most reliable day to fly (83% on time) and Sunday the least (68%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (43%).
Which airline is most on time from ATL to PWM?
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 |
|---|---|---|---|---|---|
| Delta Air Lines | 75% | 1.1% | 15 min | 6.9% | 642 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 9am91%125 flights
- 10am85%86 flights
- 3pm55%65 flights
- 7pm74%92 flights
- 8pm68%211 flights
- 9pm78%59 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday77%1.1% cancelled
- Tuesday83%0.0% cancelled
- Wednesday78%0.0% cancelled
- Thursday71%1.1% cancelled
- Friday73%1.1% cancelled
- Saturday79%2.1% cancelled
- Sunday68%2.2% 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)43%
- Late-arriving aircraft33%
- Air traffic control & airport congestion19%
- Extreme weather5%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)57%
- Extreme weather43%
- Air traffic control & airport congestion0%
- Security0%
ATL to PWM: common questions
- How often are ATL to PWM flights on time?
- 75% 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 Atlanta to Portland cancelled?
- 1.1% of scheduled flights were cancelled (7 of 642).
- How long are typical delays?
- Across all flights the average arrival delay was 15 min (early arrivals count as zero). Flights that were late arrived 57 min behind schedule on average, and 6.9% of flights were an hour or more late.
- How long is taxi time at ATL?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PWM to ATL — 81% on time
More flights from Atlanta
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ATL → PWM, nonstop flights by US airlines that report to the DOT. How we calculate this.