Are there direct flights from Seattle to Ontario?

Yes, there are direct flights on this route. Check the calendar above — prices for direct flights are highlighted.

Cheap flights Seattle — Ontario | Prices from 47 $

Q: How long is the flight from Seattle to Ontario?

Approximate flight time — 2 h 20 min. This is an average for a direct flight. With connections, the time may be longer.

Q: What is the distance from Seattle to Ontario?

The straight-line distance — 1 557 km. This is the "as-the-crow-flies" distance; the actual route may be longer.

Q: How much do flights from Seattle to Ontario cost?

The minimum price over 6 months — from 47 $ on 08.12.2026. Prices depend on the season, day of the week and how far in advance you book.

Q: What is the time difference between Seattle and Ontario?

The time difference — +0 h. Keep this in mind when planning your flight and connections.

Q: When is the best time to buy tickets Seattle — Ontario?

Optimal — 1–3 months before departure. The cheapest days — Tuesday, Wednesday, Saturday. Check the calendar above — it shows the best dates.

Route characteristics

Distance

1 557 km

Flight time

2 h 20 min

Time difference

+0 h

Minimum price

from 47 $ (08.12.2026)

Departure airports

2 pcs.

Arrival airports

1 pcs.

Airlines on the route

2 pcs.

Who flies this route 2 pcs.

Frontier Airlines

Low-cost 3 flights

Alaska Airlines

1 flight

Where to buy tickets 3 pcs.

Farera

4 tickets

Wowtickets

2 tickets

Trip.com

2 tickets

Airports

From — Seattle

BFI Boeing Field International Airport
SEA Seattle-Tacoma International Airport

To — Ontario

ONT Ontario International Airport

Frequently asked questions about the route Seattle — Ontario

How long is the flight from Seattle to Ontario?

Approximate flight time — 2 h 20 min. This is an average for a direct flight. With connections, the time may be longer. You will see the exact time when searching for tickets.

What is the distance from Seattle to Ontario?

The straight-line distance — 1 557 km. This is the "as-the-crow-flies" distance; the actual route may be longer.

How much do flights from Seattle to Ontario cost?

The minimum price over 6 months — from 47 $ on 08.12.2026. Prices depend on the season, day of the week and how far in advance you book. Usually cheaper 1–3 months before departure.

What is the time difference?

The difference — +0 h. Keep this in mind when planning your flight and connections.

From which airports does Seattle operate flights?

From Seattle: BFI (Boeing Field International Airport), SEA (Seattle-Tacoma International Airport). Choose the most convenient airport.

To which airports in Ontario do flights arrive?

To Ontario: ONT (Ontario International Airport). Check which airport your flight arrives at.

Which airlines fly this route?

This route is served by 2 airlines: Frontier Airlines, Alaska Airlines.

When is the best time to buy tickets?

Optimal — 1–3 months before departure. The cheapest days — Tuesday, Wednesday, Saturday. Check the calendar above — it shows the best dates.

How do I book tickets?

Choose a date, passengers and click "Find tickets" — a search will open comparing prices from 800+ airlines. Booking is made directly with the airline or agency.

About the route Seattle — Ontario

Flights Seattle — Ontario is a popular route. The straight-line distance is 1 557 km. Flight time 2 h 20 min. Time difference +0 h.

From Seattle (SEA) flights depart from 2 airports. To Ontario (ONT) — one arrival airport.

2 airlines operate on this route: Frontier Airlines, Alaska Airlines. Compare prices, baggage allowance and departure times.

The minimum price for the next 6 months — from 47 $ (08.12.2026). The cheapest dates are highlighted in the calendar above.

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