Flight number record

YX 5645

Republic Airways · Madison to Washington

Route: MSN → DCA
Departs: 17:20
Flights: 304
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s YX 5645, 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 5645 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 304 flights, with a median arrival 8 minutes early.

The national on-time rate over the same period is 77.3%, so YX 5645 runs 6 points behind the country as a whole. Across a thousand flights that is about 55 extra late arrivals.

On time

71.8%

Arrivals under 15 minutes late, of 294 completed flights

Avg delay

82 min

Across delayed arrivals only, not all flights

Cancelled

2.63%

National rate is 1.89%

1 hour+ late

14.6%

National rate is 8.3%

These figures cover 304 flights between September 2025 and August 2026. Beyond the headline rate, 14.6% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Schedule

When YX 5645 flies

YX 5645 flies MSN to DCA without a single fixed slot. Its most common scheduled departure was 17:20, used on 101 of 304 flights, with 17:45 (70 flights) next.

Departs 17:20101 flights33.2%
Departs 17:4570 flights23.0%

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 17:20 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and YX 5645 runs 4 points better at 71.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

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Against the route

YX 5645 next to MSN to DCA

Every carrier on MSN to DCA combined arrived on time 72.9% of the time across 1,238 flights, so YX 5645 is about level with it. Across its whole network Republic Airways managed 78.1%, which this flight trails by 6 points.

YX 5645 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 5645thin sample	304	71.8%	82 min	2.63%	C
All Republic Airways on MSN–DCA	375	69.4%	77 min	3.47%	C−
All carriers on MSN–DCA	1,238	72.9%	103 min	5.17%	C−
Republic Airways, whole network	364,452	78.1%	74 min	4.55%	B−

Across the year

YX 5645 quarter by quarter

YX 5645 did not run the same all year. Its best quarter was Apr–Jun 2026 at 79.7% on time and its weakest Jul–Sep 2026 at 62.0%, a swing of 18 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 202526 flights—
Oct–Dec 202572 flights66.2%
Jan–Mar 202675 flights74.0%
Apr–Jun 202678 flights79.7%
Jul–Sep 202653 flights62.0%

Scale runs 55% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, YX 5645 ranged from 66.0% on Friday to 76.9% on Monday. 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 5645 runs when it is late

YX 5645 often beats the schedule: 118 of 294 completed flights, 40%, arrived 15 minutes or more early. When YX 5645 is late it tends to be very late: 43 of its 83 late arrivals were an hour or more behind, and 19 were two hours or more.

15+ min early118 flights40.1%
Within 15 min93 flights31.6%
15–29 min late14 flights4.8%
30–59 min late26 flights8.8%
1–2 hours late24 flights8.2%
2+ hours late19 flights6.5%

Scale runs 0% to 100%.

Share of 294 completed flights by arrival against schedule.

Time lost at the gate mostly stays lost. Of 64 departures that left 15 minutes late or more, only 4 made it up before arrival. In the other direction, 23 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 DCA.

The worst days

Worst days for YX 5645

The latest arrival of the period was on 20 May 2026, 5 hours 9 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across May, August, March and June, with no single month standing out.

The latest arrivals of YX 5645 in the period
Date	Arrived late by	Largest filed cause
20 May 2026	5 hours 9 minutes	Carrier
16 August 2026	3 hours 40 minutes	Extreme weather
2 March 2026	3 hours 32 minutes	Late-arriving aircraft
12 June 2026	3 hours 30 minutes	National Airspace System
7 August 2026	3 hours 20 minutes	Late-arriving aircraft

Delay causes

Why YX 5645 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 6,823 reported delay minutes.

Late-arriving aircraft
34%
National Airspace System
34%
Carrier
21%
Extreme weather
12%

Extreme weather accounts for 12% 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 1.9 times the usual weather exposure. The split is drawn from 6,823 delay minutes reported on YX 5645.

Cancellations run at 2.63%, 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

14.6% 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 707 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.

YX 5645 is not only a MSN to DCA flight. It also flew DCA to MSN (304 flights, 76.6% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 304 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.

Other routes flown as YX 5645
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
DCA to MSNthin sample	304	76.6%	85 min	1.64%	B

What to do with this

Booking YX 5645

For a booking, the cancellation rate is the figure to plan around on YX 5645: 2.63% of its 304 scheduled flights did not operate. A late arrival costs an hour and a half, 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