Carrier route record
OOORD→BTV
SkyWest Airlines · Chicago to Burlington
- Flights
- 511
- Period
- September 2025 to August 2026
- Share of route
- 40%
- Carriers
- 4
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on ORD to BTV draws a D−. About 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 511 flights, with a median arrival 3 minutes late.
The national on-time rate over the same period is 77.3%, so SkyWest on ORD to BTV runs 13 points behind the country as a whole. Across a thousand flights that is about 130 extra late arrivals.
Key figures
On time
64.3%
Arrivals under 15 minutes late, of 488 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
4.31%
National rate is 1.89%
Whole route
68.5%
Every carrier on ORD to BTV, 1,282 flights
These figures cover 511 flights between September 2025 and August 2026. Beyond the headline rate, 16.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
SkyWest against every carrier on ORD to BTV
SkyWest flew 511 of the 1,282 flights on ORD to BTV, about 40% of it. Its 64.3% on time is 4 points worse than the route as a whole, which runs 68.5%. Ranked by on-time rate it is last of four carriers on the route, where the range runs from Envoy at 82.1% to SkyWest at 64.3%. 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 | 67 | 82.1% | 34 min | 0.00% | B+ |
| Republic Airwaysthin sample | 20 | 73.7% | 49 min | 5.00% | C− |
| United Airlines | 684 | 70.1% | 65 min | 0.44% | C+ |
| SkyWest Airlines (this page) | 511 | 64.3% | 88 min | 4.31% | D− |
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
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 45 points, against half a point between the best and worst carrier.
- 5am–8am39 flights89.7%
- 8am–11am45 flights75.6%
- 11am–2pm39 flights73.7%
- 2pm–5pm205 flights60.9%
- 5pm–8pm65 flights45.2%
- 8pm–5am118 flights64.5%
Scale runs 35% to 95%.
The 5pm–8pm window is where this operation falls apart: 45.2% on time, against 89.7% for the 5am–8am 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 205 flights scheduled in it.
Across the year
SkyWest on ORD to BTV through the year
- Jul–Sep 20259 flights—
- Oct–Dec 2025118 flights61.0%
- Jan–Mar 202622 flights—
- Apr–Jun 2026219 flights68.4%
- Jul–Sep 2026143 flights57.5%
Scale runs 50% 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 64.3% on time across 511 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 2026 at 57.5%, a swing of 11 points on roughly 170 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, Monday is the strongest day at 74.3% on time and Friday the weakest at 52.9%, a spread of 21 points.
Arrival by arrival
How late SkyWest on ORD to BTV runs when it is late
The 174 late arrivals split 53 under half an hour, 43 between 30 and 60 minutes, and 78 an hour or more.
- 15+ min early94 flights19.3%
- Within 15 min220 flights45.1%
- 15–29 min late53 flights10.9%
- 30–59 min late43 flights8.8%
- 1–2 hours late38 flights7.8%
- 2+ hours late40 flights8.2%
Scale runs 0% to 100%.
Share of 488 completed flights by arrival against schedule.
23 of 159 late departures made up the time and arrived on time, 14% of them. In the other direction, 38 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at BTV.
The worst days
Worst days for SkyWest on ORD to BTV
The latest arrival of the period was on 24 October 2025, 14 hours 20 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as national airspace system delay.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 24 October 2025 | 14 hours 20 minutes | Carrier |
| 6 August 2026 | 12 hours 16 minutes | National Airspace System |
| 12 June 2026 | 10 hours 4 minutes | National Airspace System |
| 15 July 2026 | 9 hours 59 minutes | Late-arriving aircraft |
| 14 April 2026 | 4 hours 54 minutes | National Airspace System |
Delay causes
Why SkyWest runs late on this route
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 15,000 reported delay minutes.
- 40%Carrier
- 28%National Airspace System
- 28%Late-arriving aircraft
- 5%Extreme weather
The largest share of delay minutes, 40%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 6,065 of the 15,000 delay minutes reported here. The split is drawn from 15,266 reported delay minutes.
Cancellations run at 4.31%, against 1.89% 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
16.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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.
The return leg runs 65.5% on time across 511 flights, within about 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. 511 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 4.31% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 488 completed flights over 12 months sit behind that.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.