Carrier route record
YXPWM→ORD
Republic Airways · Portland to Chicago
- Flights
- 558
- Period
- July 2025 to June 2026
- Share of route
- 38%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Republic Airways.
Republic on PWM to ORD lands a B−, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 558 flights, with a median arrival 10 minutes early.
Set against the rest of the country, Republic's PWM to ORD record is 5 points better than the US average of 77.6%. That gap is worth roughly 47 fewer late arrivals for every thousand flights.
Key figures
On time
82.3%
Arrivals under 15 minutes late, of 537 completed flights
Avg delay
83 min
Across delayed arrivals only, not all flights
Cancelled
3.41%
National rate is 1.81%
Whole route
77.2%
Every carrier on PWM to ORD, 1,486 flights
These figures cover 558 flights between July 2025 and June 2026. The median arrival is 10 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
Carrier by carrier
Republic against every carrier on PWM to ORD
Republic flew 558 of the 1,486 flights on PWM to ORD, about 38% of it. Its 82.3% on time is 5 points better than the route as a whole, which runs 77.2%. Ranked by on-time rate it is first of four carriers on the route, where the range runs from Republic at 82.3% to SkyWest at 65.2%. Two of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Republic Airways (this page) | 558 | 82.3% | 83 min | 3.41% | B− |
| Envoy Airthin sample | 200 | 82.2% | 97 min | 4.00% | B− |
| United Airlines | 428 | 76.6% | 94 min | 2.10% | B |
| SkyWest Airlinesthin sample | 300 | 65.2% | 89 min | 4.00% | C− |
Departure window
When Republic runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 23 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am180 flights85.5%
- 8am–11am69 flights88.1%
- 11am–2pm139 flights85.5%
- 2pm–5pm103 flights79.4%
- 5pm–8pm67 flights65.1%
- 8pm–5am—
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 88.1% of the time, against 65.1% for the evening window. That is 23 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5am–8am window is the busiest, with 180 flights scheduled in it.
Across the year
Republic on PWM to ORD through the year
Delays peak in March, when the on-time rate falls to 61.8%. February is the strongest month at 96.8%. Moving a flexible trip across that boundary buys 35 points. July was the busiest month here, with 77 flights.
Across the week, Friday is the strongest day at 91.1% on time and Thursday the weakest at 78.2%. 13 points is a smaller lever than departure hour, but it is free.
Delay causes
Why Republic runs late on this route
One category carries most of the weight here. National Airspace System accounts for 46% of the 7,858 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 46%National Airspace System
- 30%Late-arriving aircraft
- 22%Carrier
- 2%Extreme weather
- 0%Security
46% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 3,652 minutes out of 7,858, against a national NAS share of 21%. The split is drawn from 7,858 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 88.1% on time here.
Cancellations run at 3.41%, against 1.81% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and stage length
What a delay here costs
6.9% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.
The 900 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 75.8% on time across 558 flights, 7 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 7 points of difference.
One caution: this is a thin sample. 558 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking Republic on PWM to ORD
Put together: the delay figures matter less here than the 3.41% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 537 completed flights over 12 months sit behind that.
Related
Where to go next
- PWM to ORD, every carrier
- Republic on ORD to PWM, the return leg
- Envoy Air on PWM to ORD82.2%
- United Airlines on PWM to ORD76.6%
- SkyWest Airlines on PWM to ORD65.2%
- Republic Airways network-wide record
- Chicago O'Hare International (ORD) delay statistics
- The US routes with the most cancellations
- What a cancellation rate actually tells you (and what it hides)
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.