Route reliability record

DCA→TPA

Washington to Tampa

Flights: 2,248
Period: July 2025 to June 2026
Distance: 814 mi
Carriers: 3

This route sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 2,248 flights, of which Southwest Airlines flew 701 at 78.7% on time.

The US average over the same twelve months is 77.6%, so there is little to separate this route from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

74.5%

Arrivals under 15 minutes late, of 2,189 completed flights

Avg delay

78 min

Across delayed arrivals only, not all flights

Cancelled

2.40%

National rate is 1.81%

Best carrier

Southwest

78.7% on time across 701 flights

These figures cover 2,248 flights between July 2025 and June 2026. Beyond the headline rate, 10.4% 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.

Carrier by carrier

Which airline is most reliable on DCA to TPA

The choice of carrier is not cosmetic here. Southwest Airlines arrives on time 78.7% of the time; American Airlines manages 72.2%. Sample sizes sit next to every figure, because a two-point gap across 1,521 flights means less than a ten-point one.

On-time performance by carrier on DCA to TPA
Airline	Flights	On time	Avg delay	Cancelled	Grade
Republic Airwaysthin sample	26	92.3%	27 min	0.00%	A+
Southwest Airlines	701	78.7%	66 min	1.85%	B
American Airlines	1,521	72.2%	82 min	2.70%	C

Southwest leads American by 7 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.

Departure window

The best time of day to leave

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 39 points, against 7 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am303 flights94.6%
8am–11am747 flights83.7%
11am–2pm251 flights78.5%
2pm–5pm390 flights59.3%
5pm–8pm418 flights55.9%
8pm–5am139 flights70.7%

Scale runs 45% to 100%. Rows with fewer than 30 flights show a dash.

The 5pm–8pm window is where this operation falls apart: 55.9% on time, against 94.6% 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 8am–11am window is the busiest, with 747 flights scheduled in it.

Across the year

When delays peak on this route

This route's year swings by 18 points from best month to worst, which is wide. An annual average tells you very little about the week you are actually flying, so read the strip rather than the headline if your dates are fixed.

Darker means more delays. Figures are on-time percentages.April best, July worst

July is the worst month at 68.0% on time, 18 points below April, the best at 85.6%. 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. March was the busiest month here, with 218 flights.

Across the week, Tuesday is the strongest day at 80.7% on time and Sunday the weakest at 65.1%. 16 points is a smaller lever than departure hour, but it is free.

Delay causes

Why this route gets delayed

One category carries most of the weight here. Late-arriving aircraft accounts for 57% of the 43,000 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
57%
Carrier
24%
National Airspace System
16%
Extreme weather
4%
Security
0%

57% 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 43,000 reported delay minutes here, that single category outweighs weather by 15 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 43,324 reported delay minutes.

The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 94.6% on time here.

Cancellations sit at 2.40% against a national 1.81%, which is ordinary. Diversions add another 0.22%.

Connections and stage length

What a delay here actually costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.4% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The 814 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 return leg runs 74.3% on time across 2,248 flights, within half a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

The sample behind these figures is 2,248 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.

What to do with this

Booking this route

Put together: the calendar is the biggest lever here, not the carrier or the hour. April runs 85.6% on time and July 68.0%, a swing of 18 points. If the dates move at all, move them out of July before you think about anything else. 2,189 completed flights over 12 months sit behind that.

Common questions

DCA to TPA questions

How often is DCA to TPA 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 25.5% of the 2,248 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 DCA to TPA?

Southwest Airlines leads at 78.7% on time across 701 flights. American Airlines is at the other end on 72.2%, a gap of 7 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 DCA to TPA?

The 5am–8am departure window is the strongest at 94.6% on time. The 5pm–8pm window is the weakest at 55.9%, 39 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 DCA to TPA?

July is the weakest month at 68.0% on time, compared with 85.6% in April. Across the year that is 18 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.

Where to go next

Direction matters. DCA to TPA and TPA to DCA are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Updated monthly. How this data is collected.

Key figures