Route Reliability

Route reliability

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

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

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

Santa Ana, CASeattle, WA

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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

SNA to SEA

Santa Ana, CA to Seattle, WA

On time
84.7%vs 75.6% U.S. average Better than average
Cancelled
1.1%vs 1.9% U.S. average Better than average
60+ min late
3.3%vs 8.1% U.S. average Better than average
Scheduled flights
3,944in 12 months3 airlines
Most reliable airline
Alaska Airlines86.8% on time · 2,569 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 SNA to SEA, 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 86.8% 1.1% 2.4% 48 min 0.1% 2,569
2. Delta Air Lines 81.5% 1.2% 5.2% 76 min 0.2% 891
3. SkyWest Airlines Operating carrier; sold as United Express, Delta Connection, American Eagle, Alaska 79.1% 0.4% 4.8% 60 min 0.6% 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 Santa Ana (SNA) to Seattle (SEA): 86.8% of its 2,569 scheduled flights arrived within 15 minutes of schedule, compared with 79.1% for SkyWest Airlines.
  • 1.1% of flights on this route were cancelled (about 1 in 91), 0.8 points lower than the U.S. average of 1.9%.
  • 3.3% of flights, about 1 in 30, arrived an hour or more late. When a flight was late (15+ minutes), the average arrival delay was 57 min.
  • Overall, 84.7% of flights on this route arrived on time, 9.1 points higher than the U.S. average of 75.6%.
  • Over the last 3 years, November was the most reliable month on this route (89.1% on time) and June the least reliable (76.6%).
  • Cancellations peaked in February, when 2.1% of flights were cancelled.
  • Flights scheduled to depart 6 am to 7 am were the most punctual (93.2% on time); flights scheduled to depart 6 pm to 7 pm were the least (66.5%).
  • In the other direction, Seattle (SEA) to Santa Ana (SNA), 83.7% of flights were on time and 0.9% were cancelled. Compare airlines SEA to SNA.

Best and worst months to fly SNA to SEA

Jan 83.3%
Feb 87.0%
Mar 84.8%
Apr 88.6%
May 84.3%
Jun 76.6%
Jul 80.1%
Aug 77.6%
Sep 86.2%
Oct 88.1%
Nov 89.1%
Dec 84.9%
Share of scheduled flights on time 12-month average 84.7%
All airlines combined, by calendar month, September 2023 to August 2026 (3 years pooled). Scale starts at zero.
Show as table
PeriodOn timeFlights
January 83.3% 951
February 87.0% 853
March 84.8% 906
April 88.6% 913
May 84.3% 1,041
June 76.6% 1,045
July 80.1% 1,098
August 77.6% 1,061
September 86.2% 1,056
October 88.1% 1,085
November 89.1% 1,031
December 84.9% 972
Best and worst calendar month by airline, September 2023 to August 2026.
AirlineBest monthWorst month
Alaska Airlines April (90.4%) June (77.3%)
Delta Air Lines November (90.1%) June (74.0%)

Month by month, last 12 months

Sep 88.2%
Oct 85.3%
Nov 90.9%
Dec 79.3%
Jan 88.5%
Feb 88.3%
Mar 82.8%
Apr 89.7%
May 90.7%
Jun 80.2%
Jul 78.0%
Aug 76.3%
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 88.2% 330
Oct 2025 85.3% 341
Nov 2025 90.9% 329
Dec 2025 79.3% 319
Jan 2026 88.5% 312
Feb 2026 88.3% 282
Mar 2026 82.8% 308
Apr 2026 89.7% 301
May 2026 90.7% 353
Jun 2026 80.2% 354
Jul 2026 78.0% 369
Aug 2026 76.3% 346

Best and worst departure times

6a 93.2%
7a 86.9%
8a 90.3%
10a 90.6%
11a 83.1%
12p 86.9%
1p 87.0%
2p 80.6%
3p 86.5%
4p Insufficient sample
5p 79.5%
6p 66.5%
7p 82.4%
8p 90.3%
9p 88.0%
Share of scheduled flights on time
By scheduled local departure hour at SNA, 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 93.2% 311
Departing 7 am to 8 am 86.9% 389
Departing 8 am to 9 am 90.3% 391
Departing 10 am to 11 am 90.6% 415
Departing 11 am to noon 83.1% 331
Departing noon to 1 pm 86.9% 314
Departing 1 pm to 2 pm 87.0% 54
Departing 2 pm to 3 pm 80.6% 283
Departing 3 pm to 4 pm 86.5% 325
Departing 4 pm to 5 pm Insufficient sample 1
Departing 5 pm to 6 pm 79.5% 474
Departing 6 pm to 7 pm 66.5% 319
Departing 7 pm to 8 pm 82.4% 159
Departing 8 pm to 9 pm 90.3% 103
Departing 9 pm to 10 pm 88.0% 75
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 Santa Ana, CA (SNA) to Seattle, WA (SEA), 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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