Frontier Airlines flights from SEA to ONT
Find comprehensive Frontier Airlines flight information, schedules, and booking details for direct flights from SEA to ONT. Frontier Airlines operates 5-9 flights daily flights on this route.• Flight Duration: 2h 31m - 2h 51m (average flight time)• Distance: 962 miles (1548 km) (air miles between airports)• Daily Flights: 5-9 flights (scheduled departures per day)
SEA
ONT
FLIGHT TIME
2h 31m - 2h 51m
FLIGHT DISTANCE
962 miles (1548 km)
2h 40m - 2h 40m
14:17
14:17
962 miles (1548 km)
May
1 (Show)
68
Frontier Airlines Flight Schedule from SEA to ONT
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
F93163 |  Frontier Airlines | 14:17 | 16:57:00 | Airbus A321 |
Frontier Airlines Monthly Flight Calendar
December 2025
Route Insights
Pricing patterns: May typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 14:00, offering more flight options and potentially better connections.
SEA - ONT flight price statistics
$254
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$433
Feb$214
Mar$158
Apr$157
May$418
Jun$348
Jul$258
Aug$198
Sep$218
Oct$214
Nov$238
DecFrontier Airlines Terminal Information
Terminal information for Frontier Airlines on this route is currently being updated. Please check back soon or contact the airports directly for terminal details.
Frequently Asked Questions about Frontier Airlines Flights
How many Frontier Airlines flights operate from SEA to ONT?
Frontier Airlines operates 1 flight from SEA to ONT.
What city does ONT airport serve?
ONT airport serves Ontario.
How long is the Frontier Airlines flight from SEA to ONT?
The flight duration is approximately 2h 31m - 2h 51m.
What is the distance from SEA to ONT?
The distance is 962 miles (1548 km).
What aircraft does Frontier Airlines use on this route?
Frontier Airlines uses Airbus A321 on this route.
Which other airlines operate on this route?
2 other airlines operate on this route: Alaska Airlines, Delta Air Lines.
What is the cheapest month to fly Frontier Airlines from SEA to ONT?
May is typically the cheapest month to fly Frontier Airlines on this route.
What is the average price for a Frontier Airlines flight from SEA to ONT?
The average price for a round-trip Frontier Airlines flight on this route is approximately $254. Prices can vary based on booking time and demand.
How many Frontier Airlines flights operate per week on this route?
Frontier Airlines operates approximately 68 flights per week from SEA to ONT.