Route on-time record
RDM to SEA: most on-time flights and the best time to fly
Redmond (Roberts Field) to Seattle (Seattle–Tacoma International Airport). 1,970 nonstop flights in Jun 2025 to May 2026, 85% arrived within 15 minutes and 1.7% were cancelled. The most reliable flight number was Alaska 612 at 6:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
RDM → SEA
Redmond to Seattle: 1,970 nonstop flights a year
On time (12 months)
85%
Cancelled
1.7%
avg delay 10 min
Best time to leave
Before 9 AM
89% on time vs 74% noon to 3 PM
Most reliable airline
SkyWest
85% chance on time
Lowest nonstop fare seen in the next two months: $265 (Alaska 3435 on 2026-10-23). 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 612
6:00 AM → 7:15 AM1h 15m nonstop
Local times, typical schedule. Last flown 2026-05-12.
89%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 2 min
- Arrived on time 100% of the time (21 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; Noon to 3 PM: 74%).
Limited track record · 21 flights
Find Alaska 612 fares Opens this date on Aviasales#2 · SkyWest 4036 · sold as United Express, Delta Connection, American Eagle or Alaska
6:19 AM → 7:55 AM1h 35m nonstop
Local times, typical schedule. Last flown 2026-05-31.
87%
chance on time
- On time (history)
- 88%
- Cancelled
- 1.4%
- Avg arrival delay
- 14 min
- Arrived on time 88% of the time (360 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (Before 9 AM: 89% on time; Noon to 3 PM: 74%).
Strong track record · 360 flights
Find 6:19 AM flight fares Opens this date on Aviasales#3 · SkyWest 4141 · sold as United Express, Delta Connection, American Eagle or Alaska
4:55 PM → 6:22 PM1h 27m nonstop
Local times, typical schedule. Last flown 2026-05-31.
86%
chance on time
- On time (history)
- 88%
- Cancelled
- 0.9%
- Avg arrival delay
- 8 min
- Arrived on time 88% of the time (341 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 · 341 flights
Find 4:55 PM flight fares Opens this date on Aviasales#4 · SkyWest 3935 · sold as United Express, Delta Connection, American Eagle or Alaska
12:15 PM → 1:41 PM1h 26m nonstop
Local times, typical schedule. Last flown 2026-05-31.
84%
chance on time
- On time (history)
- 84%
- Cancelled
- 0.0%
- Avg arrival delay
- 12 min
- Arrived on time 84% of the time (25 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (Noon to 3 PM: 74% on time; Before 9 AM: 89%).
Limited track record · 25 flights
Find 12:15 PM flight fares Opens this date on Aviasales#5 · SkyWest 3299 · sold as United Express, Delta Connection, American Eagle or Alaska
7:33 PM → 8:53 PM1h 20m nonstop
Local times, typical schedule. Last flown 2026-05-11.
83%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 9 min
- Arrived on time 75% of the time (12 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.
Limited track record · 12 flights
Find 7:33 PM flight fares Opens this date on Aviasales#6 · SkyWest 3360 · sold as United Express, Delta Connection, American Eagle or Alaska
5:31 PM → 6:52 PM1h 21m nonstop
Local times, typical schedule. Last flown 2026-05-31.
77%
chance on time
- On time (history)
- 67%
- Cancelled
- 5.3%
- Avg arrival delay
- 11 min
- Arrived on time 67% of the time (18 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.
Limited track record · 18 flights
Find 5:31 PM flight fares Opens this date on Aviasales#7 · Alaska 276
1:53 PM → 3:11 PM1h 18m nonstop
Local times, typical schedule. Last flown 2026-05-31. Same departure also flew as Alaska 1497; its record covers all of them.
77%
chance on time
- On time (history)
- 87%
- Cancelled
- 0.0%
- Avg arrival delay
- 8 min
- Arrived on time 87% of the time (39 flights, Jun 2025 to May 2026).
- Never cancelled in 39 scheduled flights.
- Leaves in this route's least on-time window (Noon to 3 PM: 74% on time; Before 9 AM: 89%).
Limited track record · 39 flights
Find Alaska 276 fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- SkyWest Airlines (sold as United Express, Delta Connection, American Eagle or Alaska)85%
1,395 flights · 87% on time as flown · 1.8% cancel
- Alaska Airlines80%
575 flights · 80% on time as flown · 1.6% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM89%
678 flights · avg delay 12 min
- 9 AM to noon87%
429 flights · avg delay 7 min
- Noon to 3 PM74%
295 flights · avg delay 13 min
- 3 to 6 PM80%
295 flights · avg delay 11 min
- 6 to 9 PM88%
273 flights · avg delay 7 min
Best day: Saturday (86%). Worst: Sunday (81%).
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)50%
- Late-arriving aircraft22%
- Air traffic control and airport volume15%
- Severe weather13%
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
RDM to SEA questions
- What time of day is best to fly RDM to SEA?
- Before 9 AM: 89% of flights arrived on time, against 74% for departures noon to 3 PM. Later flights inherit delays from earlier ones, so the first departures of the day usually run best.
- Which airline is most on time from RDM to SEA?
- SkyWest, with a season-adjusted 85% chance of operating and arriving on time over 1,395 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 RDM to SEA?
- December (80% on time); the best was May (87%), 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 RDM
- SEA to RDM (return)
- RDM to SFO 69%
- RDM to PHX 92%
- RDM to SLC 91%
- RDM to DEN 84%
- RDM to LAX 83%
Live status: FAA delays and ground stops