Carrier route record

ASMCO→SEA

Alaska Airlines · Orlando to Seattle

Flights: 1,101
Period: September 2025 to August 2026
Share of route: 60%
Carriers: 2

Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Alaska Airlines.

Alaska on MCO to SEA lands a B+, about a point 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 about an hour on average. That rests on 1,101 flights, with a median arrival 5 minutes early.

The US average over the same twelve months is 77.3%, so there is little to separate Alaska on MCO to SEA from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

78.1%

Arrivals under 15 minutes late, of 1,089 completed flights

Avg delay

55 min

Across delayed arrivals only, not all flights

Cancelled

0.82%

National rate is 1.89%

Whole route

77.5%

Every carrier on MCO to SEA, 1,820 flights

These figures cover 1,101 flights between September 2025 and August 2026. The median arrival is 5 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.

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Carrier by carrier

Alaska against every carrier on MCO to SEA

Alaska flew 1,101 of the 1,820 flights on MCO to SEA, most of the route. Its 78.1% on time is about level with the route as a whole at 77.5%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from Alaska at 78.1% to Delta at 76.7%.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on MCO to SEA
Airline	Flights	On time	Avg delay	Cancelled	Grade
Alaska Airlines (this page)	1,101	78.1%	55 min	0.82%	B+
Delta Air Lines	719	76.7%	61 min	1.39%	B

Flight by flight

Alaska flight numbers on MCO to SEA

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Departure window

When Alaska runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 17 points, against half a point between the best and worst carrier.

5am–8am360 flights84.6%
8am–11am220 flights85.5%
11am–2pm—
2pm–5pm85 flights79.8%
5pm–8pm402 flights68.3%
8pm–5am34 flights71.9%

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

Book the morning departure. Flights leaving between 8am–11am arrive on time 85.5% of the time, against 68.3% for the evening window. That is 17 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 402 flights scheduled in it.

Across the year

Alaska on MCO to SEA through the year

Darker means more delays. Figures are on-time percentages.September best, March worst

September is the best month on the calendar at 87.1% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. March was the busiest month here, with 104 flights.

Across the week, Thursday is the strongest day at 83.2% on time and Saturday the weakest at 74.7%, a spread of 9 points.

Arrival by arrival

How late Alaska on MCO to SEA runs when it is late

Alaska on MCO to SEA often beats the schedule: 353 of 1,089 completed flights, 32%, arrived 15 minutes or more early. The 239 late arrivals split 113 under half an hour, 64 between 30 and 60 minutes, and 62 an hour or more.

15+ min early353 flights32.4%
Within 15 min497 flights45.6%
15–29 min late113 flights10.4%
30–59 min late64 flights5.9%
1–2 hours late38 flights3.5%
2+ hours late24 flights2.2%

Scale runs 0% to 100%.

Share of 1,089 completed flights by arrival against schedule.

56 of 210 late departures made up the time and arrived on time, 27% of them. In the other direction, 85 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SEA.

The worst days

Worst days for Alaska on MCO to SEA

The latest arrival of the period was on 28 December 2025, 12 hours 38 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.

The latest arrivals of Alaska on MCO to SEA in the period
Date	Arrived late by	Largest filed cause
28 December 2025	12 hours 38 minutes	Carrier
24 October 2025	5 hours 53 minutes	Late-arriving aircraft
9 January 2026	4 hours 53 minutes	Carrier
26 August 2026	4 hours 53 minutes	Late-arriving aircraft
13 March 2026	4 hours 35 minutes	Late-arriving aircraft

Delay causes

Why Alaska runs late on this route

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 13,000 reported delay minutes.

Late-arriving aircraft
35%
Carrier
30%
National Airspace System
27%
Extreme weather
8%

35% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 13,000 reported delay minutes here, that single category outweighs weather by 4 to one. The split is drawn from 13,243 reported delay minutes.

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 85.5% on time here.

Cancellations are rare at 0.82%, below the national 1.89% 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 costs

5.7% 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 about an hour, which a normal layover absorbs.

At 2,554 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 83.6% on time across 1,099 flights, 6 points above 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 6 points of difference.

The sample behind these figures is 1,101 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 Alaska on MCO to SEA

Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 87.1% on time and March 66.0%, a swing of 21 points. If the dates move at all, move them out of March before you think about anything else. 1,089 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures