Route Reliability

Route reliability

Seattle (SEA) to Santa Ana (SNA): which airline is most on time?

On-time arrivals, cancellations and long delays for every airline that reported nonstop flights from Seattle, WA (SEA) to Santa Ana, CA (SNA), September 2025 to August 2026.

Historical performance Official DOT data through August 2026 · Not live flight status

Seattle, WASanta Ana, CA

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Three-letter airport codes, nonstop U.S. domestic flights. One direction at a time.

Route at a glance · September 2025 to August 2026

SEA to SNA

Seattle, WA to Santa Ana, CA

On time
83.7%vs 75.6% U.S. average Better than average
Cancelled
0.9%vs 1.9% U.S. average Better than average
60+ min late
3.1%vs 8.1% U.S. average Better than average
Scheduled flights
3,945in 12 months3 airlines
Most reliable airline
Alaska Airlines85.3% on time · 2,570 flights

On time more often than the U.S. average, with fewer cancellations.

Compared with all U.S. flights, September 2025 to August 2026. “About average” means within 1.5 points for on time, 0.3 for cancelled and 1 for 60+ minutes late.

Airlines on this route

Ranked by on-time arrival

Airlines from SEA to SNA, September 2025 to August 2026. Rates are shares of all scheduled flights.
Airline On time Cancelled 60+ min late Avg delay when late Diverted Flights
1. Alaska Airlines Most reliable 85.3% 0.9% 2.0% 40 min 0.2% 2,570
2. Delta Air Lines 81.3% 1.0% 6.1% 71 min 0.3% 891
3. SkyWest Airlines Operating carrier; sold as United Express, Delta Connection, American Eagle, Alaska 79.8% 0.4% 3.3% 45 min 0.4% 484

On time = arrived within 15 minutes of schedule. Avg delay when late = average arrival delay of flights 15+ minutes late. "Most reliable" needs at least 300 flights in 12 months. Tap a heading to sort.

What this means

Alaska Airlines has the strongest record on this route.

  • Alaska Airlines had the best on-time record from Seattle (SEA) to Santa Ana (SNA): 85.3% of its 2,570 scheduled flights arrived within 15 minutes of schedule, compared with 79.8% for SkyWest Airlines.
  • 0.9% of flights on this route were cancelled (about 1 in 111), 1.0 points lower than the U.S. average of 1.9%.
  • 3.1% of flights, about 1 in 32, arrived an hour or more late. When a flight was late (15+ minutes), the average arrival delay was 49 min.
  • Overall, 83.7% of flights on this route arrived on time, 8.1 points higher than the U.S. average of 75.6%.
  • Over the last 3 years, April was the most reliable month on this route (88.3% on time) and July the least reliable (79.1%).
  • Flights scheduled to depart 7 pm to 8 pm were the most punctual (87.9% on time); flights scheduled to depart 2 pm to 3 pm were the least (79.2%).
  • In the other direction, Santa Ana (SNA) to Seattle (SEA), 84.7% of flights were on time and 1.1% were cancelled. Compare airlines SNA to SEA.

Best and worst months to fly SEA to SNA

Jan 85.5%
Feb 83.5%
Mar 84.3%
Apr 88.3%
May 86.9%
Jun 82.4%
Jul 79.1%
Aug 81.5%
Sep 85.2%
Oct 86.5%
Nov 84.9%
Dec 83.3%
Share of scheduled flights on time 12-month average 83.7%
All airlines combined, by calendar month, September 2023 to August 2026 (3 years pooled). Scale starts at zero.
Show as table
PeriodOn timeFlights
January 85.5% 951
February 83.5% 853
March 84.3% 908
April 88.3% 916
May 86.9% 1,039
June 82.4% 1,045
July 79.1% 1,098
August 81.5% 1,062
September 85.2% 1,056
October 86.5% 1,086
November 84.9% 1,032
December 83.3% 974
Best and worst calendar month by airline, September 2023 to August 2026.
AirlineBest monthWorst month
Alaska Airlines April (89.5%) August (79.4%)
Delta Air Lines October (87.7%) September (80.0%)

Month by month, last 12 months

Sep 87.6%
Oct 80.1%
Nov 83.6%
Dec 77.7%
Jan 87.2%
Feb 88.3%
Mar 81.2%
Apr 91.0%
May 92.4%
Jun 83.6%
Jul 74.3%
Aug 79.8%
Share of scheduled flights on time U.S. average 75.6%
All airlines combined, September 2025 to August 2026. Scale starts at zero.
Show as table
PeriodOn timeFlights
Sep 2025 87.6% 330
Oct 2025 80.1% 341
Nov 2025 83.6% 330
Dec 2025 77.7% 319
Jan 2026 87.2% 312
Feb 2026 88.3% 282
Mar 2026 81.2% 308
Apr 2026 91.0% 301
May 2026 92.4% 353
Jun 2026 83.6% 354
Jul 2026 74.3% 369
Aug 2026 79.8% 346

Best and worst departure times

6a 94.3%
7a 86.7%
8a 87.2%
9a 79.8%
10a 79.4%
11a 82.1%
12p Insufficient sample
1p 79.6%
2p 79.2%
3p 80.1%
4p 88.9%
5p 81.2%
6p 85.9%
7p 87.9%
Share of scheduled flights on time
By scheduled local departure hour at SEA, September 2025 to August 2026. Hours with no scheduled flights are omitted. Scale starts at zero.
Show as table
PeriodOn timeFlights
Departing 6 am to 7 am 94.3% 70
Departing 7 am to 8 am 86.7% 617
Departing 8 am to 9 am 87.2% 196
Departing 9 am to 10 am 79.8% 198
Departing 10 am to 11 am 79.4% 155
Departing 11 am to noon 82.1% 419
Departing noon to 1 pm Insufficient sample 34
Departing 1 pm to 2 pm 79.6% 368
Departing 2 pm to 3 pm 79.2% 130
Departing 3 pm to 4 pm 80.1% 502
Departing 4 pm to 5 pm 88.9% 90
Departing 5 pm to 6 pm 81.2% 288
Departing 6 pm to 7 pm 85.9% 290
Departing 7 pm to 8 pm 87.9% 588
Woman at an airport window watching a plane take off
Photo: Depositphotos (licensed stock, illustrative only). Credits

Sources & data dates

Source
U.S. DOT Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987-present)
Period
September 2025 to August 2026 (12 months); month-of-year patterns September 2023 to August 2026
Data through
August 2026
Processed
2026-11-03
Scope
Nonstop scheduled flights from Seattle, WA (SEA) to Santa Ana, CA (SNA), one direction. Airlines that report to the DOT only.
Method
Rates use all scheduled flights as the denominator; cancelled and diverted flights count as not on time. Figures based on fewer than 50 scheduled flights are suppressed. Full methodology.

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