Carrier route record
OOORD→BTV
SkyWest Airlines · Chicago to Burlington
- Flights
- 481
- Period
- July 2025 to June 2026
- Share of route
- 39%
- Carriers
- 4
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on ORD to BTV draws a D−. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 481 flights, with a median arrival 5 minutes late.
The national on-time rate over the same period is 77.6%, so SkyWest on ORD to BTV runs 16 points behind the country as a whole. Across a thousand flights that is about 156 extra late arrivals.
Key figures
On time
62.0%
Arrivals under 15 minutes late, of 460 completed flights
Avg delay
92 min
Across delayed arrivals only, not all flights
Cancelled
3.74%
National rate is 1.81%
Whole route
69.0%
Every carrier on ORD to BTV, 1,245 flights
These figures cover 481 flights between July 2025 and June 2026. Beyond the headline rate, 17.6% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
SkyWest against every carrier on ORD to BTV
SkyWest flew 481 of the 1,245 flights on ORD to BTV, about 39% of it. Its 62.0% on time is 7 points worse than the route as a whole, which runs 69.0%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from Envoy at 82.5% to SkyWest at 62.0%. 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 |
|---|---|---|---|---|---|
| Envoy Airthin sample | 63 | 82.5% | 36 min | 0.00% | B+ |
| United Airlines | 683 | 72.6% | 62 min | 0.73% | C+ |
| Republic Airwaysthin sample | 18 | 70.6% | 49 min | 5.56% | C− |
| SkyWest Airlines (this page) | 481 | 62.0% | 92 min | 3.74% | D− |
Departure window
When SkyWest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 33 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–8am20 flights—
- 8am–11am45 flights75.6%
- 11am–2pm67 flights66.7%
- 2pm–5pm177 flights63.4%
- 5pm–8pm89 flights42.2%
- 8pm–5am83 flights62.2%
Scale runs 35% to 80%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 42.2% on time, against 75.6% for the 8am–11am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 2pm–5pm window is the busiest, with 177 flights scheduled in it.
Across the year
SkyWest on ORD to BTV through the year
- Jul–Sep 2025122 flights47.8%
- Oct–Dec 2025118 flights61.0%
- Jan–Mar 202622 flights—
- Apr–Jun 2026219 flights68.4%
Scale runs 40% to 75%. 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 62.0% on time across 481 flights.
SkyWest on ORD to BTV did not run the same all year. Its best quarter was Apr–Jun 2026 at 68.4% on time and its weakest Jul–Sep 2025 at 47.8%, a swing of 21 points on roughly 160 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
Across the week, Tuesday is the strongest day at 70.8% on time and Sunday the weakest at 51.5%. 19 points is a smaller lever than departure hour, but it is free.
Delay causes
Why SkyWest runs late on this route
One category carries most of the weight here. Carrier accounts for 45% of the 16,000 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.
- 45%Carrier
- 21%Late-arriving aircraft
- 18%Extreme weather
- 16%National Airspace System
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 16,080 reported delay minutes.
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 7,191 of the 16,000 delay minutes reported here.
Cancellations run at 3.74%, against 1.81% nationally. That is about one flight in 25 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
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 17.6% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 763 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 61.9% on time across 481 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. 481 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 SkyWest on ORD to BTV
Put together: the delay figures matter less here than the 3.74% 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. 460 completed flights over 12 months sit behind that.
Related
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.