Route reliability record
TPA→LAX
Tampa to Los Angeles
- Flights
- 1,192
- Period
- July 2025 to June 2026
- Distance
- 2,158 mi
- Carriers
- 3
This route lands a B+, 6 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 1,192 TPA to LAX flights, of which United Airlines flew 390 at 89.7% on time.
Best time to fly TPA to LAX: a 5am–8am departure, ideally on a Tuesday. Flights in that window arrived on time 88.2% of the time and Tuesday flights 86.9%, against 83.5% for the route overall.
Set against the rest of the country, this route's record is 6 points better than the US average of 77.6%. That gap is worth roughly 59 fewer late arrivals for every thousand flights.
Key figures
On time
83.5%
Arrivals under 15 minutes late, of 1,181 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
0.84%
National rate is 1.81%
Best carrier
United
89.7% on time across 390 flights
These figures cover 1,192 flights between July 2025 and June 2026. The median arrival is 8 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.
Carrier by carrier
Which airline is most reliable on TPA to LAX
The choice of carrier is not cosmetic here. United Airlines arrives on time 89.7% of the time; Delta Air Lines manages 83.1%. Sample sizes sit next to every figure, because a two-point gap across 659 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| United Airlines | 390 | 89.7% | 70 min | 0.26% | A+ |
| Delta Air Lines | 659 | 83.1% | 64 min | 1.37% | B |
| Southwest Airlinesthin sample | 143 | 68.5% | 40 min | 0.00% | C+ |
United leads Delta by 7 points. Real, but small enough that a better departure time on the weaker carrier can outweigh it.
Flight by flight
Flights on TPA to LAX
The flight numbers below flew this route at least 250 times in the period, busiest first. Each has its own record, with its schedule and delay causes.
Best ways to make this trip
The most reliable ways to fly Tampa to Los Angeles
Every airline on this route, ranked by how often a scheduled flight actually operated and arrived on time, with its best departure time and most punctual flight number. No nearby airport pair beat these.
| Option | Airline | Success | On time | Cancelled | Best departure | Most punctual flight |
|---|---|---|---|---|---|---|
| 1. TPA → LAXTampa to Los Angeles | United Airlines | 89.5% | 89.7% | 0.26% | 11am–2pm, Sat | — |
| 2. TPA → LAXTampa to Los Angeles | Delta Air Lines | 82.0% | 83.1% | 1.37% | 5am–8am, Tue | DL 538 07:00 |
Success is the share of scheduled flights that operated and arrived less than 15 minutes late, so a cancelled flight counts against it. “(route)” means the best time comes from every carrier on the route rather than this airline alone.
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 12 points, against 7 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am560 flights88.2%
- 8am–11am117 flights79.5%
- 11am–2pm189 flights85.6%
- 2pm–5pm20 flights—
- 5pm–8pm306 flights76.2%
- 8pm–5am—
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 88.2% of the time, against 76.2% 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 5am–8am window is the busiest, with 560 flights scheduled in it.
Across the year
When delays peak on this route
This route's year swings by 17 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.
December is the weak month at 75.2% on time, against 91.7% in September. 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. April was the busiest month here, with 120 flights.
Across the week, Tuesday is the strongest day at 86.9% on time and Sunday the weakest at 77.4%. 10 points is a smaller lever than departure hour, but it is free.
Delay causes
Why this route gets delayed
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 12,000 reported delay minutes.
- 40%Carrier
- 36%Late-arriving aircraft
- 20%National Airspace System
- 5%Extreme weather
36% 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 12,000 reported delay minutes here, that single category outweighs weather by 7 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 11,581 reported delay minutes.
The largest share of delay minutes, 40%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 4,598 of the 12,000 delay minutes reported here.
Cancellations are rare at 0.84%, below the national 1.81% 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 stage length
What a delay here actually costs
Badly late arrivals are rare here: only 4.6% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 2,158 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The return leg is a different operation and performs like one: it runs 79.7% on time across 1,191 flights, 4 points below this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 4 points of difference.
The sample behind these figures is 1,192 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.
Work out the risk of missing a connection in LAX after this flight
What to do with this
Booking this route
Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 91.7% on time and December 75.2%, a swing of 17 points. If the dates move at all, move them out of December before you think about anything else. 1,181 completed flights over 12 months sit behind that.
Common questions
TPA to LAX questions
How often is TPA to LAX delayed?
About one flight in six arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 16.5% of the 1,192 flights in this analysis, against 22.4% nationally. Delayed flights are late by about an hour on average.
Which airline is most reliable on TPA to LAX?
United Airlines leads at 89.7% on time across 390 flights. Delta Air Lines is at the other end on 83.1%, 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 TPA to LAX?
The 5am–8am departure window is the strongest at 88.2% on time. The 5pm–8pm window is the weakest at 76.2%, 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 December delays on TPA to LAX?
December is the weakest month at 75.2% on time, compared with 91.7% in September. 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
- LAX to TPA — the return legseparate record
- Tampa International (TPA) delay statistics
- Los Angeles International (LAX) delay statistics
- United Airlines on TPA to LAX89.7%
- Delta Air Lines on TPA to LAX83.1%
- Southwest Airlines on TPA to LAX68.5%
- TPA to ATL, a related route79.9%
- SFO to LAX, a related route73.9%
- TPA to ORD, a related route72.8%
- United Airlines on-time record89.7%
- Delta Air Lines on-time record83.1%
- Southwest Airlines on-time record68.5%
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
Direction matters. TPA to LAX and LAX to TPA are scored separately because they are separate operations, with different departure banks and different aircraft. Compare the return leg.
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Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.