Flight number record

YX 5616

Republic Airways · Boston to Indianapolis

Route: BOS → IND
Departs: 18:05
Flights: 322
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s YX 5616, 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 5616 lands a B−, level with the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 322 flights, with a median arrival 16 minutes early.

On time

77.8%

Arrivals under 15 minutes late, of 311 completed flights

Avg delay

75 min

Across delayed arrivals only, not all flights

Cancelled

3.42%

National rate is 1.81%

1 hour+ late

8.4%

National rate is 8.1%

These figures cover 322 flights between July 2025 and June 2026. Beyond the headline rate, 8.4% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When YX 5616 flies

YX 5616 flies BOS to IND without a single fixed slot. Its most common scheduled departure was 18:05, used on 64 of 322 flights, with 18:10 (50 flights) and 18:20 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 18:0564 flights19.9%
Departs 18:1050 flights15.5%
Departs 18:2035 flights10.9%

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 18:05 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and YX 5616 runs 10 points better at 77.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

YX 5616 next to BOS to IND

Every carrier on BOS to IND combined arrived on time 81.6% of the time across 2,017 flights, so YX 5616 is 4 points behind it. Republic flew 1,962 flights on the same city pair under all its flight numbers, including this one, and those ran 81.9% on time. Across its whole network Republic Airways managed 78.5%, close to this flight's figure.

YX 5616 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 5616thin sample	322	77.8%	75 min	3.42%	B−
All Republic Airways on BOS–IND	1,962	81.9%	68 min	2.24%	B
All carriers on BOS–IND	2,017	81.6%	68 min	2.23%	B
Republic Airways, whole network	361,482	78.5%	72 min	4.08%	B−

Across the year

YX 5616 quarter by quarter

Quarter by quarter YX 5616 held fairly steady: 73.9% in Jul–Sep 2025, 77.6% in Oct–Dec 2025, 79.4% in Jan–Mar 2026 and 80.7% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202591 flights73.9%
Oct–Dec 202569 flights77.6%
Jan–Mar 202674 flights79.4%
Apr–Jun 202688 flights80.7%

Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, YX 5616 did best on Wednesday at 87.5% on time and worst on Friday at 68.8%. Each day rests on about 46 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Delay causes

Why YX 5616 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 5,142 reported delay minutes.

Carrier
41%
Late-arriving aircraft
38%
National Airspace System
18%
Extreme weather
3%

38% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,142 reported delay minutes here, that single category outweighs weather by 13 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,142 delay minutes reported on YX 5616.

Cancellations run at 3.42%, against 1.81% nationally. That is about one flight in 30 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

8.4% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

The 818 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.

The same number turns up on two other city pairs in the data, including JFK to IND (15) and PIT to BOS (2), but none flew often enough under YX 5616 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to BOS to IND only.

One caution: this is a thin sample. 322 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 5616

For a booking, the cancellation rate is the figure to plan around on YX 5616: 3.42% of its 322 scheduled flights did not operate. A late arrival costs a little over 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures