Carrier performance at one airport
YX→IAD
Republic Airways at Washington Dulles International
- Departures
- 8,421
- Period
- September 2025 to August 2026
- Routes
- 25
- Rank here
- #3 of 10
Republic Airways at Washington lands a B−, 4 points better than the national rate of 77.3%. 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 rests on 8,421 flights, of which PSA Airlines flew 967 at 83.8% on time.
Measured against the airport rather than the country, Republic Airways runs half a point ahead of the 81.0% 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
81.5%
8,152 completed departures
Avg delay
75 min
Across delayed flights only
Cancelled
3.02%
At IAD, this carrier only
Rank here
#3
Of 10 carriers clearing the floor at IAD
These figures cover 8,421 flights between September 2025 and August 2026. The median arrival is 10 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 83.8% of the time; Frontier Airlines manages 68.3%. Sample sizes sit next to every figure, because a two-point gap across 1,682 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| PSA Airlines | 967 | 83.8% | 114 min | 3.21% | B− |
| United Airlines | 36,915 | 82.1% | 73 min | 0.85% | B+ |
| Republic Airways (this page) | 8,421 | 81.5% | 75 min | 3.02% | B− |
| Delta Air Lines | 3,159 | 80.4% | 93 min | 2.44% | B |
| SkyWest Airlines | 2,514 | 79.5% | 148 min | 2.11% | B |
| American Airlines | 1,505 | 77.5% | 103 min | 2.06% | B |
| Southwest Airlines | 872 | 76.1% | 47 min | 0.92% | B+ |
| Alaska Airlines | 1,196 | 74.8% | 51 min | 1.09% | C |
| Allegiant Air | 531 | 72.2% | 106 min | 0.94% | C+ |
| Frontier Airlines | 1,682 | 68.3% | 95 min | 2.79% | C |
PSA Airlines cancels 3.2% 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 IND · Indianapolis | 935 | 84.3% | 93 min | 1.18% | B |
| IAD to LGA · New York | 911 | 73.1% | 72 min | 6.92% | C− |
| IAD to PWM · Portland | 711 | 89.0% | 79 min | 2.53% | A |
| IAD to PIT · Pittsburgh | 696 | 81.9% | 74 min | 2.44% | B |
| IAD to CMH · Columbus | 527 | 81.4% | 77 min | 1.90% | B |
| IAD to CVG · Cincinnati | 476 | 80.0% | 90 min | 2.52% | B |
| IAD to CLT · Charlotte | 452 | 81.3% | 67 min | 2.65% | B |
| IAD to BTV · Burlington | 393 | 89.8% | 76 min | 2.04% | A |
| IAD to CLE · Clevelandthin sample | 280 | 80.8% | 73 min | 3.21% | B− |
| IAD to CHS · Charlestonthin sample | 274 | 84.0% | 69 min | 1.82% | B |
| IAD to ORF · Norfolkthin sample | 253 | 78.1% | 78 min | 4.35% | B− |
| IAD to DTW · Detroitthin sample | 251 | 78.0% | 69 min | 1.59% | B |
| IAD to SDF · Louisvillethin sample | 244 | 83.7% | 125 min | 1.64% | B |
| IAD to PHL · Philadelphiathin sample | 230 | 80.9% | 68 min | 4.35% | B− |
| IAD to RDU · Raleighthin sample | 197 | 82.3% | 81 min | 2.03% | B |
| IAD to JFK · New Yorkthin sample | 177 | 50.6% | 62 min | 5.08% | F− |
| IAD to RIC · Richmondthin sample | 164 | 92.5% | 59 min | 3.05% | A− |
| IAD to BUF · Buffalothin sample | 144 | 83.2% | 96 min | 4.86% | B− |
| IAD to BDL · Hartfordthin sample | 141 | 86.6% | 75 min | 4.96% | A− |
| IAD to EYW · Key Westthin sample | 114 | 68.1% | 35 min | 0.88% | C+ |
| IAD to MSP · Minneapolisthin sample | 109 | 83.5% | 69 min | 4.59% | B− |
| IAD to MCI · Kansas Citythin sample | 103 | 83.2% | 72 min | 0.97% | B+ |
| IAD to ROC · Rochesterthin sample | 89 | 75.6% | 50 min | 2.25% | B |
| IAD to SBN · South Bendthin sample | 81 | 88.9% | 62 min | 0.00% | A+ |
| IAD to BOS · Bostonthin sample | 77 | 72.3% | 76 min | 15.58% | C− |
Flight by flight
Republic Airways flight numbers from IAD
4 Republic Airways flight numbers leaving IAD flew their main route often enough to have a record of their own. Grouped by destination.
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 18 points, against 16 points between the best and worst carrier.
- 5am–8am—
- 8am–11am1,895 flights89.9%
- 11am–2pm2,280 flights80.6%
- 2pm–5pm83 flights72.2%
- 5pm–8pm2,253 flights77.4%
- 8pm–5am1,910 flights79.3%
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
Book the morning departure. Flights leaving between 8am–11am arrive on time 89.9% of the time, against 72.2% for the afternoon window. That is 18 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 11am–2pm window is the busiest, with 2,280 flights scheduled in it.
Across the year
Seasonal pattern
December is the weak month at 73.5% on time, against 89.7% in April. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. December was the busiest month here, with 852 flights.
Delay causes
What holds this operation up
- 34%Late-arriving aircraft
- 33%Carrier
- 28%National Airspace System
- 5%Extreme weather
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 89.9% on time here. The split is drawn from 113,466 reported delay minutes.
Cancellations run at 3.02%, against 1.89% nationally. That is roughly 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.
6.7% 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 sample behind these figures is 8,421 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 delay figures matter less here than the 3.02% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the 8am–11am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 8,152 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 arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 18.5% of the 8,421 flights in this analysis, against 22.7% 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 83.8% on time across 967 flights. Frontier Airlines is at the other end on 68.3%, a gap of 16 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 89.9% on time. The 2pm–5pm window is the weakest at 72.2%, 18 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 December delays on Republic Airways at IAD?
December is the weakest month at 73.5% on time, compared with 89.7% in April. Across the year that is 16 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.