Carrier performance at one airport
WN→DCA
Southwest Airlines at Ronald Reagan Washington National
- Departures
- 16,065
- Period
- July 2025 to June 2026
- Routes
- 18
- Rank here
- #7 of 10
Southwest Airlines at Washington sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 16,065 flights, of which Delta Air Lines flew 9,505 at 78.7% on time.
Measured against the airport rather than the country, Southwest Airlines runs about a point ahead of the 73.2% weighted average across all carriers at DCA. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.
Key figures
On time
74.1%
15,729 completed departures
Avg delay
64 min
Across delayed flights only
Cancelled
1.77%
At DCA, this carrier only
Rank here
#7
Of 10 carriers clearing the floor at DCA
These figures cover 16,000 flights between July 2025 and June 2026. Beyond the headline rate, 8.8% 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.
Against the competition
Every carrier at DCA, ranked
The choice of carrier is not cosmetic here. Delta Air Lines arrives on time 78.7% of the time; PSA Airlines manages 67.7%. Sample sizes sit next to every figure, because a two-point gap across 39,988 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Lines | 9,505 | 78.7% | 90 min | 2.54% | B |
| Frontier Airlines | 984 | 78.4% | 80 min | 0.91% | B+ |
| Envoy Air | 4,857 | 78.0% | 74 min | 3.77% | B− |
| United Airlines | 6,900 | 77.8% | 89 min | 1.55% | B |
| Republic Airways | 27,126 | 76.2% | 67 min | 4.33% | B− |
| American Airlines | 27,872 | 74.8% | 84 min | 2.67% | C |
| Southwest Airlines (this page) | 16,065 | 74.1% | 64 min | 1.77% | C |
| Alaska Airlines | 2,185 | 71.1% | 59 min | 1.14% | C |
| JetBlue Airways | 6,699 | 69.4% | 84 min | 2.96% | C |
| PSA Airlines | 39,988 | 67.7% | 79 min | 5.71% | C− |
PSA Airlines cancels 5.7% 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 Southwest Airlines flies from DCA
Southwest Airlines operates 18 routes out of DCA 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 |
|---|---|---|---|---|---|
| DCA to MDW · Chicago | 2,104 | 77.2% | 62 min | 2.76% | B |
| DCA to DAL · Dallas | 1,735 | 73.1% | 65 min | 1.84% | C |
| DCA to BNA · Nashville | 1,653 | 75.9% | 63 min | 2.00% | B |
| DCA to STL · St. Louis | 1,403 | 75.7% | 66 min | 1.21% | B |
| DCA to ATL · Atlanta | 1,139 | 79.1% | 62 min | 2.11% | B |
| DCA to MCO · Orlando | 1,097 | 73.1% | 68 min | 1.37% | C |
| DCA to HOU · Houston | 1,056 | 77.5% | 63 min | 1.80% | B |
| DCA to MCI · Kansas City | 999 | 72.7% | 65 min | 1.80% | C |
| DCA to MSY · New Orleans | 706 | 72.1% | 58 min | 1.84% | C |
| DCA to TPA · Tampa | 701 | 78.7% | 66 min | 1.85% | B |
| DCA to MKE · Milwaukee | 683 | 82.8% | 64 min | 1.46% | B |
| DCA to PVD · Providence | 672 | 74.7% | 71 min | 1.64% | C |
| DCA to FLL · Fort Lauderdale | 365 | 59.9% | 57 min | 1.37% | D |
| DCA to AUS · Austin | 365 | 55.1% | 66 min | 0.55% | D+ |
| DCA to LAS · Las Vegas | 365 | 53.4% | 60 min | 1.10% | F |
| DCA to CMH · Columbusthin sample | 351 | 80.4% | 68 min | 0.28% | B+ |
| DCA to OMA · Omahathin sample | 342 | 59.5% | 78 min | 1.46% | D |
| DCA to OKC · Oklahoma Citythin sample | 329 | 68.0% | 64 min | 1.52% | C |
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 34 points, against 11 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am3,022 flights92.3%
- 8am–11am1,831 flights85.3%
- 11am–2pm3,452 flights78.7%
- 2pm–5pm3,644 flights65.5%
- 5pm–8pm3,212 flights58.3%
- 8pm–5am904 flights63.4%
Scale runs 50% to 100%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 58.3% on time, against 92.3% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 2pm–5pm window is the busiest, with 3,644 flights scheduled in it.
Across the year
Seasonal pattern
June is the worst month at 62.9% on time, 23 points below January, the best at 85.5%. 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. July was the busiest month here, with 1,386 flights.
Delay causes
What holds this operation up
- 53%Late-arriving aircraft
- 27%Carrier
- 16%National Airspace System
- 4%Extreme weather
- 0%Security
53% 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 262,000 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 261,606 reported delay minutes.
Cancellations sit at 1.77% against a national 1.81%, which is ordinary. Diversions add another 0.32%.
8.8% 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 about an hour kind, which a normal layover absorbs.
16,065 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.
Put together: the calendar is the biggest lever here, not the carrier or the hour. January runs 85.5% on time and June 62.9%, a swing of 23 points. If the dates move at all, move them out of June before you think about anything else. 15,729 completed flights over 12 months sit behind that.
Common questions
Southwest Airlines at DCA
How often is Southwest Airlines at DCA delayed?
About one flight in four arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 25.9% of the 16,065 flights in this analysis, against 22.4% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on Southwest Airlines at DCA?
Delta Air Lines leads at 78.7% on time across 9,505 flights. PSA Airlines is at the other end on 67.7%, a gap of 11 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 Southwest Airlines at DCA?
The 5am–8am departure window is the strongest at 92.3% on time. The 5pm–8pm window is the weakest at 58.3%, 34 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 June delays on Southwest Airlines at DCA?
June is the weakest month at 62.9% on time, compared with 85.5% in January. Across the year that is 23 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
- Southwest Airlines network-wide record
- Ronald Reagan Washington National (DCA) all carriers
- DCA to MDW route record77.2%
- DCA to BNA route record75.9%
- DCA to STL route record75.7%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Updated monthly. How this data is collected.