MDW to PDX flight delays & on-time performance
Nonstop flights from Chicago Midway International Airport to Portland International Airport · 1,751 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at MDW or PDX right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Chicago (MDW) to Portland (PDX) arrived on time 62% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 1% were cancelled, and 10% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 3pm did best (79% on time); around 4pm did worst (37%).
- Saturday was the most reliable day to fly (71% on time) and Friday the least (54%).
- The largest source of delay minutes was late-arriving aircraft (40%).
Which airline is most on time from MDW 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 |
|---|---|---|---|---|---|
| Southwest Airlines | 62% | 1.0% | 22 min | 9.9% | 683 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 7am65%46 flights
- 8am76%55 flights
- 9am80%10 flights
- 10am74%140 flights
- 2pm72%37 flights
- 3pm79%53 flights
- 4pm37%51 flights
- 5pm44%16 flights
- 6pm56%16 flights
- 7pm23%13 flights
- 8pm61%88 flights
- 9pm48%118 flights
- 10pm52%27 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday60%1.0% cancelled
- Tuesday59%0.0% cancelled
- Wednesday66%0.0% cancelled
- Thursday61%1.9% cancelled
- Friday54%1.9% cancelled
- Saturday71%1.2% cancelled
- Sunday64%1.2% 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 aircraft40%
- Airline (crew, maintenance, cleaning, fueling)34%
- Air traffic control & airport congestion20%
- Extreme weather6%
- Security1%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather71%
- Airline (crew, maintenance, cleaning, fueling)14%
- Air traffic control & airport congestion14%
- Security0%
MDW to PDX: common questions
- How often are MDW to PDX flights on time?
- 62% 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 Chicago to Portland cancelled?
- 1.0% of scheduled flights were cancelled (7 of 683).
- How long are typical delays?
- Across all flights the average arrival delay was 22 min (early arrivals count as zero). Flights that were late arrived 52 min behind schedule on average, and 9.9% of flights were an hour or more late.
- How long is taxi time at MDW?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PDX to MDW — 90% on time
More flights from Chicago
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: MDW → PDX, nonstop flights by US airlines that report to the DOT. How we calculate this.