Route on-time record
ANC to SEA: most on-time flights and the best time to fly
Anchorage (Ted Stevens Anchorage International Airport) to Seattle (Seattle–Tacoma International Airport). 6,715 nonstop flights in Jun 2025 to May 2026, 85% arrived within 15 minutes and 1.1% were cancelled. The most reliable flight number was Alaska 1483 at 9:05 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
ANC → SEA
Anchorage to Seattle: 6,715 nonstop flights a year
On time (12 months)
85%
Cancelled
1.1%
avg delay 11 min
Best time to leave
9 AM to noon
89% on time vs 74% 3 to 6 PM
Most reliable airline
Delta
89% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Alaska 1483
9:05 AM → 1:42 PM3h 37m nonstop
Local times, typical schedule. Last flown 2026-05-31.
94%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (40 flights, Jun 2025 to May 2026).
- Never cancelled in 40 scheduled flights.
- Leaves in this route's most on-time window (9 AM to noon: 89% on time; 3 to 6 PM: 74%).
- Short track record (40 flights), so its score leans on the airline's record at this hour.
Limited track record · 40 flights
Find Alaska 1483 fares Opens this date on Aviasales#2 · Delta 2768
11:30 AM → 4:17 PM3h 47m nonstop
Local times, typical schedule. Last flown 2026-05-31.
94%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (25 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 89% on time; 3 to 6 PM: 74%).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
- Short track record (25 flights), so its score leans on the airline's record at this hour.
Limited track record · 25 flights
Find Delta 2768 fares Opens this date on Aviasales#3 · Alaska 1496
7:24 PM → 11:59 PM3h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Alaska 157; its record covers all of them.
93%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (48 flights, Jun 2025 to May 2026).
- Never cancelled in 48 scheduled flights.
- Short track record (48 flights), so its score leans on the airline's record at this hour.
Limited track record · 48 flights
Find Alaska 1496 fares Opens this date on Aviasales#4 · Alaska 222
10:00 AM → 2:35 PM3h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (18 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 89% on time; 3 to 6 PM: 74%).
- Short track record (18 flights), so its score leans on the airline's record at this hour.
Limited track record · 18 flights
Find Alaska 222 fares Opens this date on Aviasales#5 · Delta 925
1:34 AM → 6:10 AM3h 36m nonstop
Local times, typical schedule. Last flown 2026-05-31.
91%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.3%
- Avg arrival delay
- 10 min
- Arrived on time 91% of the time (334 flights, Jun 2025 to May 2026).
- 65% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 334 flights
Find Delta 925 fares Opens this date on Aviasales#6 · Alaska 219
12:27 AM → 5:00 AM3h 33m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Alaska 188, 110; its record covers all of them.
90%
chance on time
- On time (history)
- 91%
- Cancelled
- 1.4%
- Avg arrival delay
- 7 min
- Arrived on time 91% of the time (428 flights, Jun 2025 to May 2026).
Strong track record · 428 flights
Find Alaska 219 fares Opens this date on Aviasales#7 · Delta 853
6:00 AM → 10:55 AM3h 40m nonstop
Local times, typical schedule. Last flown 2026-05-31.
90%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.8%
- Avg arrival delay
- 13 min
- Arrived on time 91% of the time (362 flights, Jun 2025 to May 2026).
Strong track record · 362 flights
Find Delta 853 fares Opens this date on Aviasales#8 · Delta 922
1:20 PM → 6:03 PM3h 43m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 89%
- Cancelled
- 1.1%
- Avg arrival delay
- 14 min
- Arrived on time 89% of the time (353 flights, Jun 2025 to May 2026).
- Lands inside SEA's trouble window: 54% of its 68 ground stops and delay programs started between 4 PM and 10 PM.
Strong track record · 353 flights
Find Delta 922 fares Opens this date on Aviasales#9 · Alaska 1477
1:38 AM → 6:09 AM3h 31m nonstop
Local times, typical schedule. Last flown 2026-03-16.
87%
chance on time
- On time (history)
- 89%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 89% of the time (9 flights, Jun 2025 to May 2026).
- Short track record (9 flights), so its score leans on the airline's record at this hour.
Limited track record · 9 flights
Find Alaska 1477 fares Opens this date on Aviasales#10 · Alaska 202
9:21 AM → 1:56 PM3h 35m nonstop
Local times, typical schedule. Last flown 2026-04-21.
87%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 91% of the time (34 flights, Jun 2025 to May 2026).
- Never cancelled in 34 scheduled flights.
- Leaves in this route's most on-time window (9 AM to noon: 89% on time; 3 to 6 PM: 74%).
- Short track record (34 flights), so its score leans on the airline's record at this hour.
Limited track record · 34 flights
Find Alaska 202 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Delta Air Lines89%
1,642 flights · 89% on time as flown · 0.7% cancel
- Alaska Airlines84%
4,911 flights · 85% on time as flown · 1.2% cancel
- Hawaiian Airlines52%
162 flights · 31% on time as flown · 1.5% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM87%
1,678 flights · avg delay 8 min
- 9 AM to noon89%
1,019 flights · avg delay 8 min
- Noon to 3 PM84%
1,109 flights · avg delay 11 min
- 3 to 6 PM74%
1,106 flights · avg delay 18 min
- After 9 PM87%
1,616 flights · avg delay 11 min
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)43%
- Late-arriving aircraft36%
- Air traffic control and airport volume14%
- Severe weather7%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
ANC to SEA questions
- What time of day is best to fly ANC to SEA?
- 9 AM to noon: 89% of flights arrived on time, against 74% for departures 3 to 6 PM.
- Which airline is most on time from ANC to SEA?
- Delta, with a season-adjusted 89% chance of operating and arriving on time over 1,642 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on ANC to SEA?
- July (79% on time); the best was May (91%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from ANC
- SEA to ANC (return)
- ANC to FAI 89%
- ANC to JNU 87%
- ANC to PDX 91%
- ANC to ADQ 85%
- ANC to ORD 78%
- ANC to MSP 84%
- ANC to BET 82%
- ANC to DEN 85%
- ANC to SCC 88%
- ANC to HNL 78%
- ANC to DFW 71%
- ANC to PHX 89%
Live status: FAA delays and ground stops