Carrier performance at one airport
YX→IAD
Republic Airways at Washington Dulles International
- Departures
- 8,917
- Period
- July 2025 to June 2026
- Routes
- 25
- Rank here
- #3 of 10
Republic Airways at Washington lands a B, 4 points better than the national rate of 77.6%. Roughly one flight in five arrive 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 8,917 flights, of which PSA Airlines flew 1,032 at 84.1% on time.
Measured against the airport rather than the country, Republic Airways runs half a point ahead of the 81.1% weighted average across all carriers at IAD. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
81.8%
8,664 completed departures
Avg delay
79 min
Across delayed flights only
Cancelled
2.69%
At IAD, this carrier only
Rank here
#3
Of 10 carriers clearing the floor at IAD
These figures cover 8,917 flights between July 2025 and June 2026. The median arrival is 9 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.
Against the competition
Every carrier at IAD, ranked
The choice of carrier is not cosmetic here. PSA Airlines arrives on time 84.1% of the time; Frontier Airlines manages 69.7%. Sample sizes sit next to every figure, because a two-point gap across 1,631 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| PSA Airlines | 1,032 | 84.1% | 104 min | 3.39% | B− |
| United Airlines | 36,559 | 82.3% | 73 min | 0.80% | B+ |
| Republic Airways (this page) | 8,917 | 81.8% | 79 min | 2.69% | B |
| Delta Air Lines | 3,063 | 80.9% | 91 min | 2.45% | B |
| SkyWest Airlines | 2,440 | 79.0% | 139 min | 2.05% | B |
| American Airlines | 1,368 | 77.2% | 97 min | 2.70% | B |
| Southwest Airlines | 1,100 | 73.9% | 51 min | 1.09% | C |
| Allegiant Air | 567 | 73.4% | 120 min | 0.35% | C+ |
| Alaska Airlines | 1,344 | 71.7% | 55 min | 0.97% | C+ |
| Frontier Airlines | 1,631 | 69.7% | 99 min | 2.45% | C |
PSA Airlines cancels 3.4% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.
Route by route
Where Republic Airways flies from IAD
Republic Airways operates 25 routes out of IAD with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| IAD to LGA · New York | 980 | 73.8% | 71 min | 6.53% | C− |
| IAD to IND · Indianapolis | 943 | 84.3% | 90 min | 1.06% | B |
| IAD to PIT · Pittsburgh | 769 | 82.7% | 81 min | 1.95% | B |
| IAD to PWM · Portland | 760 | 87.9% | 94 min | 2.37% | A |
| IAD to CMH · Columbus | 672 | 80.4% | 84 min | 2.08% | B |
| IAD to CVG · Cincinnati | 505 | 81.2% | 74 min | 0.99% | B+ |
| IAD to CLT · Charlotte | 496 | 81.3% | 72 min | 2.82% | B |
| IAD to BTV · Burlington | 470 | 87.4% | 112 min | 3.19% | A− |
| IAD to ORF · Norfolkthin sample | 341 | 79.7% | 75 min | 4.69% | B− |
| IAD to CHS · Charlestonthin sample | 298 | 82.6% | 58 min | 1.68% | B |
| IAD to CLE · Clevelandthin sample | 274 | 84.3% | 75 min | 2.19% | B |
| IAD to SDF · Louisvillethin sample | 230 | 85.7% | 134 min | 0.00% | A+ |
| IAD to RDU · Raleighthin sample | 213 | 80.4% | 79 min | 1.88% | B |
| IAD to DTW · Detroitthin sample | 209 | 78.3% | 57 min | 2.39% | B |
| IAD to BDL · Hartfordthin sample | 200 | 85.9% | 64 min | 4.50% | A− |
| IAD to RIC · Richmondthin sample | 192 | 92.5% | 57 min | 3.12% | A− |
| IAD to PHL · Philadelphiathin sample | 155 | 83.8% | 51 min | 4.52% | B− |
| IAD to ROC · Rochesterthin sample | 149 | 71.5% | 60 min | 2.68% | C |
| IAD to BUF · Buffalothin sample | 130 | 80.0% | 103 min | 3.85% | B− |
| IAD to JAX · Jacksonvillethin sample | 120 | 83.3% | 48 min | 5.00% | B− |
| IAD to SBN · South Bendthin sample | 120 | 84.5% | 129 min | 3.33% | B− |
| IAD to JFK · New Yorkthin sample | 115 | 59.3% | 67 min | 1.74% | D |
| IAD to EYW · Key Westthin sample | 114 | 68.1% | 35 min | 0.88% | C+ |
| IAD to SAV · Savannahthin sample | 81 | 86.2% | 186 min | 0.00% | A+ |
| IAD to PVD · Providencethin sample | 70 | 88.6% | 77 min | 0.00% | A+ |
Departure window
Best time of day for this operation
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 12 points, against 14 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am—
- 8am–11am2,003 flights89.7%
- 11am–2pm2,291 flights81.8%
- 2pm–5pm161 flights78.6%
- 5pm–8pm2,427 flights77.6%
- 8pm–5am2,035 flights79.2%
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 89.7% of the time, against 77.6% for the evening window. That is 12 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 2,427 flights scheduled in it.
Across the year
Seasonal pattern
July is the worst month at 73.1% on time, 17 points below April, the best at 89.7%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. August was the busiest month here, with 1,016 flights.
Delay causes
What holds this operation up
- 38%Late-arriving aircraft
- 34%Carrier
- 22%National Airspace System
- 7%Extreme weather
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 124,000 reported delay minutes here, that single category outweighs weather by 6 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 123,992 reported delay minutes.
Cancellations run at 2.69%, against 1.81% 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.
6.7% 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 are the a little over an hour kind, which a normal layover absorbs.
The sample behind these figures is 8,917 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.
Put together: the calendar is the biggest lever here, not the carrier or the hour. April runs 89.7% on time and July 73.1%, a swing of 17 points. If the dates move at all, move them out of July before you think about anything else. 8,664 completed flights over 12 months sit behind that.
Common questions
Republic Airways at IAD
How often is Republic Airways at IAD delayed?
Roughly one flight in five arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 18.2% of the 8,917 flights in this analysis, against 22.4% nationally. Delayed flights are late by a little over an hour on average.
Which airline is most reliable on Republic Airways at IAD?
PSA Airlines leads at 84.1% on time across 1,032 flights. Frontier Airlines is at the other end on 69.7%, a gap of 14 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.
What time of day has the fewest delays on Republic Airways at IAD?
The 8am–11am departure window is the strongest at 89.7% on time. The 5pm–8pm window is the weakest at 77.6%, 12 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.
How bad are July delays on Republic Airways at IAD?
July is the weakest month at 73.1% on time, compared with 89.7% in April. Across the year that is 17 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Updated monthly. How this data is collected.