Alaska Airlines flights from ONT to SEA
Find comprehensive Alaska Airlines flight information, schedules, and booking details for direct flights from ONT to SEA. Alaska Airlines operates 4-9 flights daily flights on this route.• Flight Duration: 2h 40m - 3h 07m (average flight time)• Distance: 962 miles (1548 km) (air miles between airports)• Daily Flights: 4-9 flights (scheduled departures per day)
ONT
SEA
FLIGHT TIME
2h 40m - 3h 07m
FLIGHT DISTANCE
962 miles (1548 km)
2h 53m - 2h 54m
06:00
19:21
962 miles (1548 km)
April
1 (Show)
52
Alaska Airlines Flight Schedule from ONT to SEA
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
AS607 |  Alaska Airlines | 06:00 | 08:54:00 | Boeing 737-800 (winglets) Passenger/BBJ2 |
AS654 | Alaska Airlines | 10:49 | 13:42:00 | Boeing 737-900 (winglets) Passenger/BBJ3 |
AS665 | Alaska Airlines | 16:48 | 19:41:00 | Boeing 737MAX 9 Passenger |
AS594 | Alaska Airlines | 19:21 | 22:14:00 | Boeing 737-800 (winglets) Passenger/BBJ2 |
Alaska Airlines Monthly Flight Calendar
December 2025
Route Insights
Duration variability: Flight duration on this route can vary based on aircraft type, wind conditions, and airline scheduling. Average duration is 2h 40m - 3h 07m.
Pricing patterns: April typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 6:00, 10:00, 16:00, offering more flight options and potentially better connections.
ONT - SEA flight price statistics
$249
ApproximateThe numbers are average prices found based on user searches for direct flights between the airports. It's calculated from the cheapest prices found per month for a round-trip with 1 adult and can vary depending on the amount of data we have for this particular route.
$196
Jan$438
Feb$217
Mar$158
Apr$158
May$398
Jun$311
Jul$258
Aug$198
Sep$198
Oct$218
Nov$238
DecAlaska Airlines Terminal Information
Terminal information for Alaska Airlines on this route is currently being updated. Please check back soon or contact the airports directly for terminal details.
Frequently Asked Questions about Alaska Airlines Flights
How many Alaska Airlines flights operate from ONT to SEA?
Alaska Airlines operates 4 flights from ONT to SEA.
What city does SEA airport serve?
SEA airport serves SeaTac.
How long is the Alaska Airlines flight from ONT to SEA?
The flight duration is approximately 2h 40m - 3h 07m.
What is the distance from ONT to SEA?
The distance is 962 miles (1548 km).
What aircraft does Alaska Airlines use on this route?
Alaska Airlines uses Boeing 737-800 (winglets) Passenger/BBJ2, Boeing 737-900 (winglets) Passenger/BBJ3, Boeing 737MAX 9 Passenger on this route.
Which other airlines operate on this route?
2 other airlines operate on this route: Delta Air Lines, Frontier Airlines.
What are the earliest and latest Alaska Airlines flight departure times?
The earliest Alaska Airlines flight departs at 06:00 and the latest departs at 19:21.
What is the cheapest month to fly Alaska Airlines from ONT to SEA?
April is typically the cheapest month to fly Alaska Airlines on this route.
What is the average price for a Alaska Airlines flight from ONT to SEA?
The average price for a round-trip Alaska Airlines flight on this route is approximately $249. Prices can vary based on booking time and demand.
How many Alaska Airlines flights operate per week on this route?
Alaska Airlines operates approximately 52 flights per week from ONT to SEA.