Flight number record

YX 3437

Republic Airways · Newark to Detroit

Route: EWR → DTW
Departs: 16:00
Flights: 297
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s YX 3437, 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 3437 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 297 flights, with a median arrival 13 minutes early.

Set against the rest of the country, YX 3437's record is 8 points better than the US average of 77.3%. That gap is worth roughly 78 fewer late arrivals for every thousand flights.

On time

85.1%

Arrivals under 15 minutes late, of 282 completed flights

Avg delay

66 min

Across delayed arrivals only, not all flights

Cancelled

4.71%

National rate is 1.89%

1 hour+ late

5.0%

National rate is 8.3%

These figures cover 297 flights between September 2025 and August 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.

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Schedule

When YX 3437 flies

YX 3437 flies EWR to DTW without a single fixed slot. Its most common scheduled departure was 16:00, used on 77 of 297 flights, with 14:07 (69 flights) and 16:16 (38 flights) next.

Departs 16:0077 flights25.9%
Departs 14:0769 flights23.2%
Departs 16:1638 flights12.8%

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 16:00 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and YX 3437 runs 13 points better at 85.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

YX 3437 next to EWR to DTW

Every carrier on EWR to DTW combined arrived on time 79.9% of the time across 3,660 flights, so YX 3437 is 5 points ahead of it. Republic flew 1,558 flights on the same city pair under all its flight numbers, including this one, and those ran 84.4% on time. Across its whole network Republic Airways managed 78.1%, which this flight beats by 7 points.

YX 3437 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 3437thin sample	297	85.1%	66 min	4.71%	A−
All Republic Airways on EWR–DTW	1,558	84.4%	70 min	6.68%	B−
All carriers on EWR–DTW	3,660	79.9%	88 min	5.63%	B−
Republic Airways, whole network	364,452	78.1%	74 min	4.55%	B−

Across the year

YX 3437 quarter by quarter

YX 3437 did not run the same all year. Its best quarter was Apr–Jun 2026 at 93.6% on time and its weakest Oct–Dec 2025 at 78.6%, a swing of 15 points on roughly 74 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 202526 flights—
Oct–Dec 202588 flights78.6%
Jan–Mar 202646 flights86.4%
Apr–Jun 202681 flights93.6%
Jul–Sep 202656 flights84.0%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, YX 3437 ranged from 79.5% on Thursday to 90.5% on Tuesday. With about 42 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 3437 runs when it is late

YX 3437 often beats the schedule: 122 of 282 completed flights, 43%, arrived 15 minutes or more early. The 42 late arrivals split 14 under half an hour, 14 between 30 and 60 minutes, and 14 an hour or more.

15+ min early122 flights43.3%
Within 15 min118 flights41.8%
15–29 min late14 flights5.0%
30–59 min late14 flights5.0%
1–2 hours late7 flights2.5%
2+ hours late7 flights2.5%

Scale runs 0% to 100%.

Share of 282 completed flights by arrival against schedule.

8 of 39 late departures made up the time and arrived on time, 21% of them. 11 flights left on time and still arrived late.

The worst days

Worst days for YX 3437

The latest arrival of the period was on 12 June 2026, 7 hours 3 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across June, May, December, September and March, with no single month standing out.

The latest arrivals of YX 3437 in the period
Date	Arrived late by	Largest filed cause
12 June 2026	7 hours 3 minutes	Extreme weather
18 May 2026	2 hours 56 minutes	National Airspace System
28 December 2025	2 hours 52 minutes	Carrier
17 September 2025	2 hours 44 minutes	Carrier
13 March 2026	2 hours 25 minutes	National Airspace System

Delay causes

Why YX 3437 runs late

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 2,787 reported delay minutes.

National Airspace System
34%
Carrier
28%
Late-arriving aircraft
23%
Extreme weather
15%

Extreme weather accounts for 15% 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 quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.5 times the usual weather exposure. The split is drawn from 2,787 delay minutes reported on YX 3437.

Cancellations run at 4.71%, against 1.89% nationally. That is about one flight in twenty 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

5.0% 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 nine other city pairs in the data, including EWR to MSY (37), BNA to EWR (8) and EWR to DFW (6), but none flew often enough under YX 3437 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to EWR to DTW only.

One caution: this is a thin sample. 297 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 3437

For a booking, the cancellation rate is the figure to plan around on YX 3437: 4.71% of its 297 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.

Where to go next

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 22 October 2026; recomputed monthly. How this data is collected.

Key figures