My trip
Plan a trip
Tell FlyerIntel where and when you are flying. It will show how that route actually performs at that time of day and on that day of the week, what both airports are doing right now, and when to get to the airport.
SEA → ONT
Seattle to Ontario · departing 7:59 PM
There is no day-by-hour view for SEA → ONT: only 13 of its weekday-and-hour slots have 120 or more flights, and a day-by-hour view needs 45.
Other times on SEA → ONT
Time of day
On SEA → ONT, flights leaving 5–9 AM arrived on time 90.3% of the time, against 83.3% for those leaving 6–9 PM: 7.0 points more often.
- 5–9 AM90.3%
- 9 AM–12 PM85.8%
- 12–3 PM78.7%
- 3–6 PM76.8%
- 6–9 PM83.3%
- 9 PM–5 AM66.5%
Day of week
- Monday81.7%
- Tuesday86.3%
- Wednesday83.4%
- Thursday78.7%
- Friday80.3%
- Saturday84.7%
- Sunday78.9%
Bars start below the lowest figure so a real gap is visible; read the percentage, not the bar length. A time with too few flights to score is left unscored rather than guessed at.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · History describes what has happened on this route. It is not a prediction about your flight. Full route profile →
Which flight
Flights on SEA → ONT, the ones scheduled closest to 7:59 PM first.
Within 90 minutes of 7:59 PM, OO3884 (usually 7:50 PM) has the best record: 85.0% on time and 0.00% cancelled over 100 flights, against 81.8% on time for SEA → ONT as a whole.
| Flight | Usually departs | On time | Cancelled |
|---|---|---|---|
| OO3884SkyWest AirlinesLive map | 7:50 PM9 min away | 85.0% | 0.00% |
| AS489Alaska AirlinesLive map | 8:33 PM34 min away | 70.9% | 0.51% |
| AS592Alaska AirlinesLive map | 3:37 PM262 min away | 72.5% | 0.00% |
| OO4031SkyWest AirlinesLive map | 2:30 PM329 min away | 88.3% | 0.14% |
| AS1364Alaska AirlinesLive map | 8:30 AM689 min away | 89.7% | 4.18% |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · “Usually departs” is the scheduled time each flight number most often had over the period; airlines retime flights, so confirm the time on your booking. Flight numbers with fewer than 90 operations on this route are left out. This is history, not a forecast for your flight.
When to get to the airport
A starting point for SEA, not a promise about your day.
2h 0m before your 7:59 PM departure
How this was worked out
- It does not include your journey to the airport, parking, or a shuttle from a remote lot.
- International departures, and travel with children, checked pets or special assistance, need more time.
Both airports right now
Aviation weather is not currently a factor.
Minimal operational impact. Conditions are not a notable factor for operations right now.
UpdatedAviation weather is not currently a factor.
Minimal operational impact. Conditions are not a notable factor for operations right now.
UpdatedSource: NOAA Aviation Weather Center · Conditions describe the airfield, not your flight, and change quickly.
Other ways to make this journey
Airport pairings serving Seattle to Los Angeles.
Who flies this route
Performance by the carrier that actually operates the flight.
| Carrier | Flights | On time | Cancelled | Median delay |
|---|---|---|---|---|
| Alaska Airlines | 3,858 | 76.3% | 1.53% | -1 min |
| SkyWest Airlines | 2,890 | 89.2% | 0.14% | -8 min |
| Delta Air Lines | 514 | 85.1% | 0.97% | -11 min |
| Frontier Airlines | 494 | 77.8% | 2.43% | -5 min |