Route · PDX → MDW · 2020–2025 BTS data
Portland to Chicago
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PDX to MDW (Portland to Chicago) ranks #3369 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 88.5%
- On-time
- +9.5 pts
- vs US avg
- 51 min
- Delay when late
- 2,831
- Flights
- #3369 of 4927
- Corpus placement
Cancelled
0.2%
Best Month
Oct 2024 93%
Worst Month
Jun 2024 78%
Distance
1,751 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 31 | 5 | 0 | 0 | WN |
| Nov 2025 | 31 | 1 | 0 | 1 | WN |
| Oct 2025 | 54 | 9 | 0 | 0 | WN |
| Sep 2025 | 82 | 7 | 0 | 0 | WN |
| Aug 2025 | 84 | 7 | 0 | 0 | WN |
| Jul 2025 | 88 | 18 | 1 | 2 | WN |
| Jun 2025 | 78 | 16 | 0 | 0 | WN |
| May 2025 | 31 | 2 | 0 | 0 | WN |
| Apr 2025 | 30 | 3 | 0 | 0 | WN |
| Mar 2025 | 31 | 4 | 0 | 0 | WN |
| Jan 2025 | 31 | 1 | 0 | 0 | WN |
| Dec 2024 | 31 | 3 | 0 | 0 | WN |
| Nov 2024 | 31 | 1 | 0 | 0 | WN |
| Oct 2024 | 55 | 4 | 0 | 0 | WN |
| Sep 2024 | 81 | 13 | 0 | 0 | WN |
| Aug 2024 | 85 | 8 | 0 | 1 | WN |
| Jul 2024 | 88 | 12 | 0 | 0 | WN |
| Jun 2024 | 80 | 18 | 0 | 0 | WN |
| May 2024 | 31 | 1 | 0 | 1 | WN |
| Apr 2024 | 30 | 0 | 0 | 0 | WN |
| Mar 2024 | 31 | 1 | 0 | 0 | WN |
| Jan 2024 | 31 | 7 | 1 | 0 | WN |
| Dec 2023 | 31 | 6 | 0 | 0 | WN |
| Nov 2023 | 33 | 3 | 0 | 0 | WN |
PDX–MDW seasonal on-time pattern
Best: April (93.0%) · weakest: June (82.0%)
Strongest calendar month
April
93.0% on-time · ~31 flights/mo
Busiest calendar month
August
~67 flights/mo avg
Weakest calendar month
June
82.0% on-time · ~61 flights/mo
Cancellation Rate
0.2%
2 of 1,209 flights
Diversion Rate
0.4%
5 of 1,209 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PDX - Portland
Full on-time, delay-cause, and seasonal performance for Portland, OR.
PDX on-time profileMDW - Chicago
Full on-time, delay-cause, and seasonal performance for Chicago, IL.
MDW on-time profileCompare the two airports
See PDX and MDW side by side on delays, cancellations, and reliability.
Compare PDX vs MDWOrigin-hub reliability standing
Among PDX's stronger departures
PDX → MDW posts a 88.5% on-time rate, landing in the ≥85% band with 26 of 44 BTS-tracked routes leaving Portland. The same hub also shows 17 mid-band and 1 challenged departures · fleet-wide on-time rank #333 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to PDX–MDW.
Routes with a similar on-time rate
What the Data Says About PDX to MDW
Portland to Chicago (PDX to MDW) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 88.5% on-time rate across 2,831 flights, with delays that do happen averaging 50.7 minutes. The corridor runs roughly 1,751 miles and is served by 1 carrier. Over the most recent 24 months, 2 of 1,209 flights were cancelled (0.2%) and 5 diverted (0.4%).
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 93% on-time, while Jun 2024 came in at just 78% - a 15-point swing worth factoring into travel timing.
On the multi-year calendar, PDX–MDW peaks in April at 93.0% on-time while August carries the heaviest traffic (~67 flights per month) ; the softest month is June at 82.0%, a 11.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does PDX to MDW rank among US routes by traffic? ▼
How often are flights delayed from PDX to MDW? ▼
What is the cancellation rate for PDX to MDW? ▼
How far is the flight from PDX to MDW? ▼
When is the best time to fly from PDX to MDW? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using PDX–MDW data
PDX–MDW runs 9.5 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare PDX and MDW airport profiles: delay causes and top routes differ even on the same corridor. PDX airport
- If your dates flex, April (93.0% on-time) beats June (82.0%) on this corridor. Seasonal chart
- 4 other routes post a similar 88.5% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.