Flight number record

YX 5663

Republic Airways · Columbus to Boston

Route: CMH → BOS
Departs: 07:05
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 5663, 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 5663 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 14 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 40 minutes. That rests on 365 flights, with a median arrival 17 minutes early.

Set against the rest of the country, YX 5663's record is 14 points better than the US average of 77.6%. That gap is worth roughly 137 fewer late arrivals for every thousand flights.

On time

91.3%

Arrivals under 15 minutes late, of 358 completed flights

Avg delay

41 min

Across delayed arrivals only, not all flights

Cancelled

1.37%

National rate is 1.81%

1 hour+ late

1.7%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 17 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.

Schedule

When YX 5663 flies

YX 5663 flies CMH to BOS without a single fixed slot. Its most common scheduled departure was 07:05, used on 145 of 365 flights, with 06:00 (79 flights) and 07:00 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:05145 flights39.7%
Departs 06:0079 flights21.6%
Departs 07:0039 flights10.7%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 07:05 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and YX 5663 runs 2 points better at 91.3%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

YX 5663 next to CMH to BOS

Every carrier on CMH to BOS combined arrived on time 82.6% of the time across 2,002 flights, so YX 5663 is 9 points ahead of it. Republic flew 1,913 flights on the same city pair under all its flight numbers, including this one, and those ran 83.5% on time. Across its whole network Republic Airways managed 78.5%, which this flight beats by 13 points.

YX 5663 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 5663	365	91.3%	41 min	1.37%	A
All Republic Airways on CMH–BOS	1,913	83.5%	61 min	2.04%	B
All carriers on CMH–BOS	2,002	82.6%	63 min	2.00%	B
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 5663 quarter by quarter

YX 5663 did not run the same all year. Its best quarter was Apr–Jun 2026 at 97.8% on time and its weakest Jan–Mar 2026 at 82.6%, a swing of 15 points on roughly 91 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 202592 flights93.4%
Oct–Dec 202592 flights91.2%
Jan–Mar 202690 flights82.6%
Apr–Jun 202691 flights97.8%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, YX 5663 ranged from 87.8% on Monday to 96.2% on Friday. With about 52 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why YX 5663 runs late

One category carries most of the weight here. Carrier accounts for 53% of the 1,274 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.

Carrier
53%
National Airspace System
45%
Extreme weather
2%

The largest share of delay minutes, 53%, 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 677 of the 1,274 delay minutes reported here. The split is drawn from 1,274 delay minutes reported on YX 5663.

Cancellations sit at 1.37% against a national 1.81%, which is ordinary. Diversions add another 0.55%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 1.7% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 640 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.

Every one of the 365 flights under YX 5663 in the data flew CMH to BOS. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 365 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 5663

For a booking, YX 5663 has one of the better records a US domestic flight can show: 91.3% on time and 1.37% cancelled. That is a base rate, not a promise about any single day.

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures