Flight number record
YX 3591
Republic Airways · Burlington to Newark
- Route
- BTV → EWR
- Departs
- 10:35
- Flights
- 303
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s YX 3591, check with Republic Airways. Republic Airways flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
YX 3591 earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.3%. When something does go wrong the average delay runs about an hour. That rests on 303 flights, with a median arrival 18 minutes early.
Set against the rest of the country, YX 3591's record is 8 points better than the US average of 77.3%. That gap is worth roughly 77 fewer late arrivals for every thousand flights.
Key figures
On time
85.0%
Arrivals under 15 minutes late, of 294 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
2.64%
National rate is 1.89%
1 hour+ late
5.1%
National rate is 8.3%
These figures cover 303 flights between September 2025 and August 2026. The median arrival is 18 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.
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Schedule
When YX 3591 flies
YX 3591 flies BTV to EWR without a single fixed slot. Its most common scheduled departure was 10:35, used on 71 of 303 flights, with 11:00 (53 flights) and 11:13 (36 flights) next.
- Departs 10:3571 flights23.4%
- Departs 11:0053 flights17.5%
- Departs 11:1336 flights11.9%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 10:35 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and YX 3591 runs level with that at 85.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
YX 3591 next to BTV to EWR
Every carrier on BTV to EWR combined arrived on time 82.4% of the time across 591 flights, so YX 3591 is 3 points ahead of it. Republic flew 560 flights on the same city pair under all its flight numbers, including this one, and those ran 82.4% on time. Across its whole network Republic Airways managed 78.1%, which this flight beats by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| YX 3591thin sample | 303 | 85.0% | 56 min | 2.64% | A |
| All Republic Airways on BTV–EWR | 560 | 82.4% | 74 min | 3.57% | B− |
| All carriers on BTV–EWR | 591 | 82.4% | 72 min | 3.89% | B− |
| Republic Airways, whole network | 364,452 | 78.1% | 74 min | 4.55% | B− |
Across the year
YX 3591 quarter by quarter
YX 3591 did not run the same all year. Its best quarter was Jan–Mar 2026 at 95.5% on time and its weakest Oct–Dec 2025 at 78.6%, a swing of 17 points on roughly 76 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.
- Jul–Sep 202529 flights—
- Oct–Dec 202585 flights78.6%
- Jan–Mar 202670 flights95.5%
- Apr–Jun 202684 flights86.9%
- Jul–Sep 202635 flights83.9%
Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, YX 3591 ranged from 79.5% on Sunday to 90.9% on Wednesday. With about 43 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late YX 3591 runs when it is late
YX 3591 often beats the schedule: 157 of 294 completed flights, 53%, arrived 15 minutes or more early. The 44 late arrivals split 17 under half an hour, 12 between 30 and 60 minutes, and 15 an hour or more.
- 15+ min early157 flights53.4%
- Within 15 min93 flights31.6%
- 15–29 min late17 flights5.8%
- 30–59 min late12 flights4.1%
- 1–2 hours late11 flights3.7%
- 2+ hours late4 flights1.4%
Scale runs 0% to 100%.
Share of 294 completed flights by arrival against schedule.
A late pushback is often recovered here: of 27 departures that left 15 minutes late or more, 9 still arrived on time. In the other direction, 26 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 EWR.
The worst days
Worst days for YX 3591
The latest arrival of the period was on 18 June 2026, 3 hours 4 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 |
|---|---|---|
| 18 June 2026 | 3 hours 4 minutes | Carrier |
| 9 November 2025 | 2 hours 55 minutes | National Airspace System |
| 19 December 2025 | 2 hours 10 minutes | Late-arriving aircraft |
| 8 November 2025 | 2 hours 9 minutes | National Airspace System |
| 11 October 2025 | 1 hour 57 minutes | National Airspace System |
Delay causes
Why YX 3591 runs late
National Airspace System accounts for 60% of the 2,461 delay minutes carriers reported here, and the remaining four split what is left.
- 60%National Airspace System
- 23%Late-arriving aircraft
- 17%Carrier
- 1%Extreme weather
60% 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 1,467 minutes out of 2,461, against a national NAS share of 21%. The split is drawn from 2,461 delay minutes reported on YX 3591.
Cancellations run at 2.64%, against 1.89% nationally. That is about one flight in 40 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 routes
What a delay on this flight costs
5.1% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
The same number turns up on seven other city pairs in the data, including EWR to PIT (82), EWR to DTW (32) and PIT to ORD (19), but none flew often enough under YX 3591 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BTV to EWR only.
One caution: this is a thin sample. 303 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 YX 3591
For a booking, the cancellation rate is the figure to plan around on YX 3591: 2.64% of its 303 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- Newark Liberty International (EWR) delay statistics
- Republic Airways on-time record
- Every Republic Airways flight number with a record
- The most and least reliable flight numbers in the US
- What a cancellation rate actually tells you (and what it hides)
A flight number here means Republic Airways’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.