Historical on-time performance
Chicago to Portland
Flights on ORD–PDX arrive on time 70% of the time over the last 12 months.
based on 2,648 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- United AirlinesOn-time73%Medianon timep9045 minCancel0.4%Flights1,386
- Alaska AirlinesOn-time72%Medianon timep9035 minCancel0.9%Flights462
- American AirlinesOn-time64%Medianon timep9065 minCancel1.4%Flights800
Why flights run late
Delay causes
- Airline30%
- Weather5%
- Air traffic (NAS)18%
- Late aircraft47%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline24%
- Weather71%
- Air traffic (NAS)5%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 21 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ORD → PDX
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 83% on time.
- Mornings83% on time · p90 25 min · 2,080 flights
- Middays80% on time · p90 35 min · 1,384 flights
- Afternoons76% on time · p90 45 min · 1,991 flights
- Evenings64% on time · p90 70 min · 488 flights
- Overnights57% on time · p90 75 min · 1,112 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 77% on time.
- Tuesdays77% on time · p90 45 min · 966 flights
- Thursdays77% on time · p90 40 min · 1,043 flights
- Saturdays77% on time · p90 40 min · 961 flights
- Mondays76% on time · p90 45 min · 1,056 flights
- Wednesdays75% on time · p90 50 min · 975 flights
- Sundays72% on time · p90 50 min · 1,011 flights
- Fridays72% on time · p90 55 min · 1,043 flights
Keep exploring