Flight number record

YX 5687

Republic Airways · Washington to Boston

Route: DCA → BOS
Departs: 08:29
Flights: 279
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s YX 5687, 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 5687 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 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 279 flights, with a median arrival 12 minutes early.

Set against the rest of the country, YX 5687's record is 9 points better than the US average of 77.3%. That gap is worth roughly 93 fewer late arrivals for every thousand flights.

On time

86.6%

Arrivals under 15 minutes late, of 277 completed flights

Avg delay

69 min

Across delayed arrivals only, not all flights

Cancelled

0.72%

National rate is 1.89%

1 hour+ late

5.1%

National rate is 8.3%

These figures cover 279 flights between September 2025 and August 2026. The median arrival is 12 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 5687 flies

YX 5687 flies DCA to BOS without a single fixed slot. Its most common scheduled departure was 08:29, used on 101 of 279 flights, with 08:40 (53 flights) and 08:30 (38 flights) next.

Departs 08:29101 flights36.2%
Departs 08:4053 flights19.0%
Departs 08:3038 flights13.6%

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 08:29 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and YX 5687 runs 3 points better at 86.6%. 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 5687 next to DCA to BOS

Every carrier on DCA to BOS combined arrived on time 70.1% of the time across 9,104 flights, so YX 5687 is 17 points ahead of it. Republic flew 3,998 flights on the same city pair under all its flight numbers, including this one, and those ran 76.9% on time. Across its whole network Republic Airways managed 78.1%, which this flight beats by 9 points.

YX 5687 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
YX 5687thin sample	279	86.6%	69 min	0.72%	A+
All Republic Airways on DCA–BOS	3,998	76.9%	70 min	4.40%	B−
All carriers on DCA–BOS	9,104	70.1%	80 min	4.34%	C−
Republic Airways, whole network	364,452	78.1%	74 min	4.55%	B−

Across the year

YX 5687 quarter by quarter

Quarter by quarter YX 5687 held fairly steady: 84.8% in Oct–Dec 2025, 89.8% in Apr–Jun 2026 and 85.7% in Jul–Sep 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202526 flights—
Oct–Dec 202579 flights84.8%
Jan–Mar 202628 flights—
Apr–Jun 202688 flights89.8%
Jul–Sep 202658 flights85.7%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, YX 5687 ranged from 81.4% on Sunday to 92.9% on Monday. With about 40 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.

Arrival by arrival

How late YX 5687 runs when it is late

YX 5687 often beats the schedule: 111 of 277 completed flights, 40%, arrived 15 minutes or more early. The 37 late arrivals split 10 under half an hour, 13 between 30 and 60 minutes, and 14 an hour or more.

15+ min early111 flights40.1%
Within 15 min129 flights46.6%
15–29 min late10 flights3.6%
30–59 min late13 flights4.7%
1–2 hours late9 flights3.2%
2+ hours late5 flights1.8%

Scale runs 0% to 100%.

Share of 277 completed flights by arrival against schedule.

10 of 38 late departures made up the time and arrived on time, 26% of them. 9 flights left on time and still arrived late.

The worst days

Worst days for YX 5687

The latest arrival of the period was on 28 March 2026, 5 hours 43 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.

The latest arrivals of YX 5687 in the period
Date	Arrived late by	Largest filed cause
28 March 2026	5 hours 43 minutes	Carrier
16 March 2026	4 hours	Carrier
15 September 2025	2 hours 23 minutes	National Airspace System
4 July 2026	2 hours 14 minutes	Carrier
30 October 2025	2 hours 13 minutes	National Airspace System

Delay causes

Why YX 5687 runs late

Carrier accounts for 64% of the 2,543 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
64%
National Airspace System
23%
Late-arriving aircraft
11%
Extreme weather
2%

The largest share of delay minutes, 64%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,620 of the 2,543 delay minutes reported here. The split is drawn from 2,543 delay minutes reported on YX 5687.

Cancellations are rare at 0.72%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

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 a little over an hour, which a normal layover absorbs.

The same number turns up on four other city pairs in the data, including BOS to DCA (171), DTW to SDF (4) and SAV to BOS (1), but none flew often enough under YX 5687 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DCA to BOS only.

One caution: this is a thin sample. 279 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 5687

For a booking, YX 5687 has one of the better records a US domestic flight can show: 86.6% on time and 0.72% 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures