Cheap flights from Ontario to Seattle (ONT - SEA)

ONT — SEA
Dec 4 — Dec 111

The best prices from Ontario to Seattle/Tacoma Intl are usually found in January or February, booked 42 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

How to find the cheapest flight from Ontario (ONT) to Seattle (SEA)

All the information you need to plan the best ONT to SEA flight in 2022: compare Ontario to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.

ONT - SEA

Price

$176 - $418

SEA

Temperature

41 - 66.2 °F

SEA

Rainfall

0.7 - 6.6 inches

Popular inJulyHigh demand for flights, 38% potential price rise
Cheapest inJanuaryBest time to find cheap flights, 32% potential price drop
Round-trip from$176From Ontario to Seattle/Tacoma Intl
One-way from$79One-way flight from Ontario to Seattle/Tacoma Intl

What is the cheapest day to fly round-trip from Ontario to Seattle?

Flights from Ontario to Seattle are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Seattle.

How far in advance should I book a flight from Ontario to Seattle?

Users have found that booking a flight from Ontario to Seattle at least 39 days early can save you up to 91% on average compared to booking a flight this week. If booking 39 days before your flight isn’t an option for you, users have found flights from Ontario to Seattle for as little as $363 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $526 for flights departing within the next 3 days.

What is the cheapest month to fly from Ontario to Seattle?

January can be a great time to fly to Seattle from Ontario with a flight ticket averaging about $269. Cheapflights users have found deals in the month of January for as cheap as $119. The most expensive prices can be found in the month of July.

When is the cheapest time to fly from Ontario to Seattle (ONT - SEA)?

It’s typically best to fly out from Ontario to Seattle in the evening. Doing so could potentially save you 32% on the flight price compared to flying in the afternoon, which is usually more expensive.

Cheap flights from Ontario to Seattle in November, December 2022

The best prices found for ONT to SEA flights for November, December
Dec 6 - Dec 10
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

14h 23m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

7h 20m
$116

Multiple Airlines

Pick Dates

Deal found 11/27

Dec 5 - Dec 7
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

13h 27m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

5h 44m
$119

Multiple Airlines

Pick Dates

Deal found 11/28

Dec 8 - Dec 12
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

18h 46m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

8h 20m
$123

Frontier

Pick Dates

Deal found 11/28

Ontario to Seattle 2022 flight deals

Cheap flights to Seattle from Ontario found for this year
Dec 6 - Dec 10
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

14h 23m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

7h 20m
$116

Multiple Airlines

Pick Dates

Deal found 11/27

Dec 5 - Dec 7
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

13h 27m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

5h 44m
$119

Multiple Airlines

Pick Dates

Deal found 11/28

Dec 8 - Dec 12
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

18h 46m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

8h 20m
$123

Frontier

Pick Dates

Deal found 11/28

Cheap American Airlines flights from Ontario to Seattle

Jan 25 - Feb 1
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

7h 06m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

6h 10m
$156

American Airlines

Pick Dates

Deal found 11/27

Jan 19 - Jan 25
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

7h 07m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

6h 10m
$166

American Airlines

Pick Dates

Deal found 11/27

Cheap Frontier flights from Ontario to Seattle

Dec 8 - Dec 12
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

18h 46m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

8h 20m
$123

Frontier

Pick Dates

Deal found 11/28

Dec 5 - Dec 7
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

20h 08m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

7h 25m
$134

Frontier

Pick Dates

Deal found 11/28

Dec 5 - Dec 7
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

20h 08m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

7h 25m
$135

Frontier

Pick Dates

Deal found 11/28

Non-stop flights to Seattle from Ontario

Save time with Ontario to Seattle direct flight deals
Feb 1 - Feb 8
ONT

Ontario

SEA

Seattle/Tacoma Intl

Nonstop

2h 50m
SEA

Seattle/Tacoma Intl

ONT

Ontario

Nonstop

2h 49m
$137

Multiple Airlines

Pick Dates

Deal found 11/29

Jan 14 - Jan 17
ONT

Ontario

SEA

Seattle/Tacoma Intl

Nonstop

2h 56m
SEA

Seattle/Tacoma Intl

ONT

Ontario

Nonstop

2h 38m
$138

Delta

Pick Dates

Deal found 11/29

Jan 11 - Jan 15
ONT

Ontario

SEA

Seattle/Tacoma Intl

Nonstop

2h 56m
SEA

Seattle/Tacoma Intl

ONT

Ontario

Nonstop

2h 34m
$147

Multiple Airlines

Pick Dates

Deal found 11/29

Last minute flights from Ontario to Seattle

Late deals on return flights to Seattle from Ontario, departing today and this week
Dec 6 - Dec 10
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

14h 23m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

7h 20m
$116

Multiple Airlines

Pick Dates

Deal found 11/27

Dec 5 - Dec 7
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

13h 27m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

5h 44m
$119

Multiple Airlines

Pick Dates

Deal found 11/28

Dec 8 - Dec 12
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

18h 46m
SEA

Seattle/Tacoma Intl

ONT

Ontario

1 stop

8h 20m
$123

Frontier

Pick Dates

Deal found 11/28

One-way flights to Seattle from Ontario

The cheapest one-way flights from Ontario to Seattle
Jan 10
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

17h 22m
$47

Frontier

Pick Dates

Deal found 11/29

Jan 27
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

24h 34m
$48

Frontier

Pick Dates

Deal found 11/29

Jan 4
ONT

Ontario

SEA

Seattle/Tacoma Intl

1 stop

25h 33m
$55

Frontier

Pick Dates

Deal found 11/26

Related info for your journey

Useful info, stats and facts about Ontario to Seattle flights.

What airports do I use to fly from Ontario to Seattle?

If you wish to fly to Seattle from Ontario, then you need to book flights from Ontario to Seattle/Tacoma Intl. There are 8 flights from Ontario (ONT) to Seattle/Tacoma Intl (SEA) per day to choose from. Flights to Seattle from Ontario are available from 8 different airlines, which means you should have some options if you want to compare airfare deals. 2h 44m is how long a nonstop flight from Ontario to Seattle/Tacoma Intl typically takes.

Which airlines flying from Ontario to Seattle/Tacoma Intl have flexible cancellations due to COVID-19?

Alaska Airlines, Delta, and Juneyao Airlines are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Can I find flights from Ontario to Seattle for under $200 on Cheapflights?

Yes, there are multiple flights from Ontario to Seattle for under $200. The cheapest flight booked recently is on Multiple Airlines for just $121, but on average you can expect to pay $133.

Are there nonstop flights from Ontario to Seattle for under $200 on Cheapflights?

Cheapflights has at least 20 direct flights from Ontario to Seattle under $200. A good price for a nonstop flight from Ontario to Seattle is less than $175.

Are there last-minute flights available from Ontario to Seattle for under $200?

There are currently 20+ open flights from Ontario to Seattle within the next 7 days for less than $200.

What days are nonstop flights available from Ontario to Seattle?

Nonstop flights are available for this route on the following days: Sunday, Tuesday, Wednesday, Thursday, Saturday.

How popular is this Ontario to Seattle flight route?

The Ontario to Seattle/Tacoma Intl flight path was viewed by 123 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

How many flights depart from Ontario to Seattle on average per day?

On average 10 flights depart from Ontario to Seattle per day.
Early Morning (Midnight to 6am) - 20% of flight departures
Morning (6am - Noon) - 20% of flight departures
Afternoon (Noon - 6pm) - 20% of flight departures
Evening (6pm - Midnight) - 40% of flight departures

How long is the flight from Ontario to Seattle?

There are many flights that can get you from Ontario to Seattle in 2h 56m. Fly via Delta or American Airlines to get the fastest option. There are 962 mi between Ontario and Seattle. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from Ontario to Seattle round-trip?

Cheapflights users have booked flights from Ontario to Seattle round-trip from $138. Another airline that can offer you cheap pricing is American Airlines. You may be able to fly from Ontario to Seattle for 46% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Ontario to Seattle one-way?

The cheapest airlines for a one-way flight from Ontario to Seattle are Frontier ($47), Alaska Airlines ($63), and Delta ($79).

What are the most popular airlines that fly from Ontario to Seattle?

American Airlines, Alaska Airlines and Delta are the most popular airlines when flying from Ontario to Seattle.

What are the most reliable airlines from Ontario to Seattle?

Consider SkyWest Airlines (92%), Qatar Airways (91%) or Virgin Atlantic (88%) when booking your flight. These represent the most reliable airlines when flying from Ontario to Seattle.

What are the cheapest flights from Ontario to Seattle?

While on average a flight from Ontario to Seattle is generally $390, our data shows the cheapest flight currently is $73. When looking at the most popular route, (Ontario - Seattle/Tacoma Intl), you can expect to pay $136 for that flight.

Alternative routes for Ontario to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Ontario to Seattle

The chart below displays the airlines Cheapflights users traveling from Ontario to Seattle choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
Juneyao AirlinesCheapest$15Average$22FlexibilityNo cancel feeOn-time66%COVID-19 safety
Search Juneyao Airlines flights
Alaska AirlinesCheapest$99Average$237FlexibilityNo cancel feeOn-time75%COVID-19 safety
Search Alaska Airlines flights
FrontierCheapest$110Average$186FlexibilityNo cancel feeOn-time62%COVID-19 safety
Search Frontier flights
DeltaCheapest$119Average$282FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
United AirlinesCheapest$163Average$470FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights

Hourly flight availability from Ontario to Seattle

See what time of day planes typically take off from Ontario to Seattle
44%of flight departuresEarly morningMidnight to 6 am
32%of flight departuresMorning6 am to noon
24%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Weekly flight availability from Ontario to Seattle

See how many times per day planes take to the skies headed from Ontario to Seattle
Sunday11daily flights
Monday12daily flights
Tuesday7daily flights
Wednesday7daily flights
Thursday6daily flights
Friday9daily flights
Saturday7daily flights