Carrier route record

MQORD→PWM

Envoy Air · Chicago to Portland

Flights: 199
Period: July 2025 to June 2026
Share of route: 13%
Carriers: 4

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Envoy Air.

Envoy on ORD to PWM 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 a little over an hour on average. That is a workable record, not a spotless one. That rests on 199 flights. The strongest carrier on the route with a full sample, Republic Airways, flew 558 at 75.8% on time.

Set against the rest of the country, Envoy's ORD to PWM 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.

On time

82.3%

Arrivals under 15 minutes late, of 192 completed flights

Avg delay

72 min

Across delayed arrivals only, not all flights

Cancelled

3.52%

National rate is 1.81%

Whole route

74.0%

Every carrier on ORD to PWM, 1,486 flights

These figures cover 199 flights between July 2025 and June 2026. The median arrival is 13 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

Envoy against every carrier on ORD to PWM

Envoy flew 199 of the 1,486 flights on ORD to PWM, about 13% of it. Its 82.3% on time is 8 points better than the route as a whole, which runs 74.0%. Ranked by on-time rate it is first of four carriers on the route, where the range runs from Envoy at 82.3% to SkyWest at 69.4%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

The two carriers here are closely matched: 5 points separate the best from the worst. At that spread, schedule and price are better tie-breakers than reliability. Sample sizes are shown so you can see which rows are worth weighing.

On-time performance by carrier on ORD to PWM
Airline	Flights	On time	Avg delay	Cancelled	Grade
Envoy Air (this page)thin sample	199	82.3%	72 min	3.52%	B−
Republic Airways	558	75.8%	69 min	2.87%	B
United Airlines	429	71.0%	70 min	1.17%	C
SkyWest Airlinesthin sample	300	69.4%	68 min	3.00%	C

No carrier stands out. Republic tops the table at 75.8%, 5 points clear of the bottom, which is inside the range this kind of sample moves year to year.

Departure window

When Envoy runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 25 points, against 5 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am—
8am–11am23 flights—
11am–2pm46 flights81.8%
2pm–5pm53 flights90.6%
5pm–8pm40 flights83.8%
8pm–5am37 flights65.7%

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

The best window here is not the first bank but the 2pm–5pm slot at 90.6% on time, ahead of 8pm–5am at 65.7%. Where the curve peaks mid-day rather than at dawn, the constraint is usually congestion at one end rather than the aircraft's own rotation. The 2pm–5pm window is the busiest, with 53 flights scheduled in it.

Across the year

Envoy on ORD to PWM through the year

Jul–Sep 20254 flights—
Jan–Mar 202672 flights72.9%
Apr–Jun 2026123 flights87.3%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 82.3% on time across 199 flights.

Split by quarter, Envoy on ORD to PWM logged 4 flights in Jul–Sep 2025, 72 flights in Jan–Mar 2026 and 123 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 82.3% annual figure is the one to use.

Delay causes

Why Envoy runs late on this route

One category carries most of the weight here. Late-arriving aircraft accounts for 51% of the 2,458 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.

Late-arriving aircraft
51%
Carrier
20%
Extreme weather
18%
National Airspace System
10%

Extreme weather accounts for 18% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.9 times the usual weather exposure. The split is drawn from 2,458 reported delay minutes.

51% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 2,458 reported delay minutes here, that single category outweighs weather by 3 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit.

Cancellations run at 3.52%, 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

6.8% 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 a little over an hour, 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 runs 82.2% on time across 200 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

One caution: this is a thin sample. 199 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 Envoy on ORD to PWM

Put together: the delay figures matter less here than the 3.52% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 2pm–5pm departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 192 completed flights over 12 months sit behind that.

Where to go next

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.

Key figures