Historical on-time performance
Chicago to Portland
1,751 miData through Dec 2025Source: US DOT · BTS
Flights on MDW–PDX arrive on time 69% of the time over the last 12 months.
On-time rate69%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 570 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time69%Medianon timep9045 minCancel0.2%Flights570
Why flights run late
Delay causes
- Airline36%
- Weather5%
- Air traffic (NAS)18%
- Late aircraft40%
- Security1%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly MDW → PDX
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 62% to 82% on time.
- Middays82% on time · p90 25 min · 209 flights
- Mornings78% on time · p90 25 min · 410 flights
- Evenings70% on time · p90 55 min · 272 flights
- Afternoons67% on time · p90 45 min · 379 flights
- Overnights62% on time · p90 60 min · 423 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 66% to 77% on time.
- Saturdays77% on time · p90 30 min · 224 flights
- Mondays73% on time · p90 50 min · 255 flights
- Wednesdays72% on time · p90 35 min · 252 flights
- Tuesdays72% on time · p90 45 min · 252 flights
- Sundays67% on time · p90 55 min · 202 flights
- Fridays67% on time · p90 45 min · 254 flights
- Thursdays66% on time · p90 40 min · 254 flights
Advertisement
Keep exploring