How many flights depart from State of Washington to Ontario on average per day?

The number of flights available between State of Washington and Ontario is 25 per day as of August 2025. The most frequent departure time is 3:00PM, with 47% of daily flights leaving in the afternoon.

What is the cheapest airline that flies from Washington to Ontario?

Frontier, Southwest, and Delta are the most popular carriers operating from Washington to Ontario

How long does it take to fly to Ontario?

Average flight duration from State of Washington to Ontario depends on which airport you fly into and out of. Flying from Spokane to Los Angeles is 2h 39m on average, while flying from Pasco to Los Angeles is 2h 41m on average. Los Angeles is the most popular airport in Ontario.

How many flights depart from State of Washington to Ontario on average per week?

As of August 2025, 180 flights take off from State of Washington and land in Ontario each week. The most common flight departure day for this route is Thu, with 18% of weekly flights taking off on this day.

What airlines fly to Ontario?

Alaska Airlines, Delta and Frontier are the top three most popular airlines that fly to Ontario from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 10 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Washington to Ontario Airport?

Prices for flights from Washington to Ontario Airport are updated daily.

How many operators does momondo search for flights from Washington to Ontario Airport?

There are 7 operators available for flights from Washington to Ontario Airport as of August 2025.

How old do you have to be to fly from Washington to Ontario Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$38 Cheap Flights from Washington to Ontario in 2025

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Find the cheapest flights from Washington to Los Angeles

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

12:30 pm - 3:18 pmSEA-ONT

2h 48mnonstop

8:43 am - 11:41 amONT-SEA

2h 58mnonstop

$75Frontier

Find Deal

vie., sep. 12 - lun., sep. 22

6:40 pm - 9:02 pmPDX-ONT

2h 22mnonstop

8:25 am - 10:51 amONT-PDX

2h 26mnonstop

$75Frontier

Find Deal

vie., nov. 7 - lun., nov. 10

1:45 pm - 8:33 pmPDX-ONT

6h 48m1 stop

1:42 pm - 8:37 pmONT-PDX

6h 55m1 stop

$159United Airlines

Find Deal

mié., sep. 3 - sáb., sep. 6

1:24 pm - 6:47 pmPDX-ONT

5h 23m1 stop

8:07 am - 10:33 amONT-PDX

2h 26mnonstop

$175

Find Deal

mar., sep. 16 - vie., sep. 19

7:17 pm - 9:38 pmPDX-ONT

2h 21mnonstop

3:06 pm - 10:47 pmONT-PDX

7h 41m1 stop

$176

Find Deal

dom., sep. 21 - mar., sep. 23

5:13 am - 11:56 amPDX-ONT

6h 43m1 stop

1:10 pm - 7:23 pmONT-PDX

6h 13m1 stop

$178American Airlines

Find Deal

jue., sep. 11 - sáb., sep. 20

10:40 am - 5:35 pmPDX-ONT

6h 55m1 stop

3:30 pm - 11:10 pmONT-PDX

7h 40m1 stop

$186Southwest

Find Deal

mar., sep. 9 - lun., sep. 15

2:25 pm - 8:45 pmPDX-ONT

6h 20m2 stops

1:25 pm - 9:30 pmONT-PDX

8h 05m1 stop

$191Southwest

Find Deal

mié., sep. 3 - sáb., sep. 6

5:15 am - 12:32 pmGEG-ONT

7h 17m1 stop

5:05 am - 12:36 pmONT-GEG

7h 31m1 stop

$254United Airlines

Find Deal

mié., sep. 24 - dom., sep. 28

6:32 am - 12:03 pmGEG-ONT

5h 31m1 stop

4:47 pm - 11:09 pmONT-GEG

6h 22m1 stop

$318American Airlines

Find Deal

mié., nov. 19 - dom., nov. 23

Southwest flights from State of Washington to Ontario

Our best Southwest deals on State of Washington to Ontario flight tickets

Southwest

Sep 9

PDX10:40 amPortland

6h 55m

1 stop

ONT5:35 pmOntario

Sep 15

ONT3:30 pmOntario

7h 40m

1 stop

PDX11:10 pmPortland

$186

Find similar

Southwest

Sep 3

PDX2:25 pmPortland

6h 20m

2 stops

ONT8:45 pmOntario

Sep 6

ONT1:25 pmOntario

8h 05m

1 stop

PDX9:30 pmPortland

$191

Find similar

Southwest

Sep 9

GEG10:45 amSpokane

6h 45m

2 stops

ONT5:30 pmOntario

Sep 16

ONT2:55 pmOntario

4h 35m

1 stop

GEG7:30 pmSpokane

$214

Find similar

Delta flights from State of Washington to Ontario

Our best Delta deals on State of Washington to Ontario flight tickets

Delta

Aug 30

PSC5:45 amPasco Tri Cities

6h 29m

1 stop

ONT12:14 pmOntario

Aug 31

ONT6:00 amOntario

5h 04m

1 stop

PSC11:04 amPasco Tri Cities

$199

Find similar

Delta

Oct 22

GEG5:05 amSpokane

6h 03m

1 stop

ONT11:08 amOntario

Oct 28

ONT4:35 pmOntario

5h 59m

1 stop

GEG10:34 pmSpokane

$209

Find similar

Delta

Aug 30

PSC5:45 amPasco Tri Cities

6h 29m

1 stop

ONT12:14 pmOntario

Sep 6

ONT6:00 amOntario

5h 04m

1 stop

PSC11:04 amPasco Tri Cities

$218

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleOntario

SEA - ONT

SEAONT

Seattle/Tacoma Intl

vie. 9/12

12:30 pm-3:18 pm

Nonstop2h 48m

Ontario

lun. 9/22

8:43 am-11:41 am

Nonstop2h 58m

$75

PortlandOntario

PDX - ONT

PDXONT

Portland

vie. 11/7

6:40 pm-9:02 pm

Nonstop2h 22m

Ontario

lun. 11/10

8:25 am-10:51 am

Nonstop2h 26m

$75

PortlandOntario

PDX - ONT

PDXONT

Portland

mié. 9/3

1:45 pm-8:33 pm

1 stop6h 48m

Ontario

sáb. 9/6

1:42 pm-8:37 pm

1 stop6h 55m

$159

PortlandOntario

PDX - ONT

PDXONT

Portland

mar. 9/16

1:24 pm-6:47 pm

1 stop5h 23m

Ontario

vie. 9/19

8:07 am-10:33 am

Nonstop2h 26m

$175

PortlandOntario

PDX - ONT

PDXONT

Portland

dom. 9/21

7:17 pm-9:38 pm

Nonstop2h 21m

Ontario

mar. 9/23

3:06 pm-10:47 pm

1 stop7h 41m

$176

PortlandOntario

PDX - ONT

PDXONT

Portland

jue. 9/11

5:13 am-11:56 am

1 stop6h 43m

Ontario

sáb. 9/20

1:10 pm-7:23 pm

1 stop6h 13m

$178

PortlandOntario

PDX - ONT

PDXONT

Portland

mar. 9/9

10:40 am-5:35 pm

1 stop6h 55m

Ontario

lun. 9/15

3:30 pm-11:10 pm

1 stop7h 40m

$186

PortlandOntario

PDX - ONT

PDXONT

Portland

mié. 9/3

2:25 pm-8:45 pm

2 stops6h 20m

Ontario

sáb. 9/6

1:25 pm-9:30 pm

1 stop8h 05m

$191

SpokaneOntario

GEG - ONT

GEGONT

Spokane

mié. 9/24

5:15 am-12:32 pm

1 stop7h 17m

Ontario

dom. 9/28

5:05 am-12:36 pm

1 stop7h 31m

$254

SpokaneOntario

GEG - ONT

GEGONT

Spokane

mié. 11/19

6:32 am-12:03 pm

1 stop5h 31m

Ontario

dom. 11/23

4:47 pm-11:09 pm

1 stop6h 22m

$318

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How to get the cheapest flight ticket from State of Washington to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Ontario?

In general, September is the cheapest month to fly from State of Washington to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $149. If you aren’t able to travel during the month of September, then book flights to Ontario from State of Washington during October instead. Flights to Ontario in October, while not as cheap as those in September, still average around $176.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Saturday when prices can be found for as low as $191. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from State of Washington to Ontario for around $219.

What is the cheapest time of day to depart on your flight to Ontario?

At noon is the cheapest time of day to fly from State of Washington to Ontario when you can find flight prices for as low as $179. Flying to Ontario at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $229 on average. Flights to Ontario from State of Washington in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Washington to Ontario flight route?

Fly from Seattle/Tacoma Intl to Ontario for the best Washington - Ontario flight prices

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

You are more likely to see cheaper flights to Ontario from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $208 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from State of Washington for as low as $157 on momondo.

What cabin class options are available on Washington to Ontario flights?

There are 4 cabin classes available to choose from on Washington to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on State of Washington to Ontario flights?

You could potentially save up to 9% on your flight if you consider stops on a State of Washington to Ontario flight.

Cheap State of Washington to Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Ontario

Best Price Found	$38
Fastest flight time	2h 10m
Direct flights	Every day
Airports in Ontario	1 airport

The best one-way flight to Ontario from State of Washington in the past 72 hours is $38. The best round-trip flight deal from State of Washington to Ontario found on momondo in the last 72 hours is $75.

The fastest flight from State of Washington to Ontario takes 2h 10m

Direct flights go from State of Washington to Ontario every day.

There is 1 airport near Ontario: Ontario (ONT)

Search flight deals

When did momondo last update prices for flights from Washington to Ontario Airport?
Prices for flights from Washington to Ontario Airport are updated daily.
How many operators does momondo search for flights from Washington to Ontario Airport?
There are 7 operators available for flights from Washington to Ontario Airport as of August 2025.
How old do you have to be to fly from Washington to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from State of Washington to Ontario?
momondo data reveals that the most frequently booked plane model on the route from State of Washington to Ontario is Boeing 737-800 Passenger/BBJ2 (winglets), representing 19.19% of all bookings. The subsequent popular models are Airbus A320neo at 16.94%, Boeing 737-900 Passenger/BBJ3 (winglets) at 16.79%, and Boeing 737 MAX 9 at 16.30%.

Best airlines flying from State of Washington to Ontario

Compare and see reviews for airlines that fly from State of Washington to Ontario with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $65	Free Cancellation	Rating 5.8 3,219 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $72	Free Cancellation	Rating 6.3 8,045 reviews	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $98	Free Cancellation	Rating 7.8 2,656 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $117	Free Cancellation	Rating 8.0 7,980 reviews	Search Delta flights
Alaska Airlines	PriceFrom $129	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $196	Free Cancellation	Rating 8.0 4,244 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Ontario?

Finding the right flight to Ontario from Washington is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.

Can I find flights from Washington to Ontario with flexible booking policies on momondo?

Yes. All flights to Ontario from Washington on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington to Ontario?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington to Ontario.

I’m not ready to book a flight from Washington to Ontario right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Washington to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Cheap flights from Washington to Los Angeles from $38

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Los Angeles departing on 9/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Southwest flights from State of Washington to Ontario

Our best Southwest deals on State of Washington to Ontario flight tickets

Delta flights from State of Washington to Ontario

Our best Delta deals on State of Washington to Ontario flight tickets

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How to get the cheapest flight ticket from State of Washington to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Ontario?

What is the cheapest day to depart on your flight to Ontario?

What is the cheapest time of day to depart on your flight to Ontario?

What is the cheapest Washington to Ontario flight route?

Fly from Seattle/Tacoma Intl to Ontario for the best Washington - Ontario flight prices

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

What cabin class options are available on Washington to Ontario flights?

There are 4 cabin classes available to choose from on Washington to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on State of Washington to Ontario flights?

You could potentially save up to 9% on your flight if you consider stops on a State of Washington to Ontario flight.

What is the cheapest airline that flies from Washington to Ontario?

Frontier, Southwest, and Delta are the most popular carriers operating from Washington to Ontario

What airlines fly to Ontario?

How many flights depart from State of Washington to Ontario on average per day?

The number of flights available between State of Washington and Ontario is 25 per day as of August 2025. The most frequent departure time is 3:00PM, with 47% of daily flights leaving in the afternoon.

How many flights depart from State of Washington to Ontario on average per week?

As of August 2025, 180 flights take off from State of Washington and land in Ontario each week. The most common flight departure day for this route is Thu, with 18% of weekly flights taking off on this day.

How long does it take to fly to Ontario?

Average flight duration from State of Washington to Ontario depends on which airport you fly into and out of. Flying from Spokane to Los Angeles is 2h 39m on average, while flying from Pasco to Los Angeles is 2h 41m on average. Los Angeles is the most popular airport in Ontario.

Cheap State of Washington to Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Ontario

Best Price Found

Fastest flight time

Direct flights

Airports in Ontario

When did momondo last update prices for flights from Washington to Ontario Airport?

How many operators does momondo search for flights from Washington to Ontario Airport?

How old do you have to be to fly from Washington to Ontario Airport?

What documentation or ID do you need to fly to Ontario Airport?

What is the most popular plane model from State of Washington to Ontario?

Best airlines flying from State of Washington to Ontario

Compare and see reviews for airlines that fly from State of Washington to Ontario with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Ontario?

Can I find flights from Washington to Ontario with flexible booking policies on momondo?

How can momondo help me find flights from Washington to Ontario?

I’m not ready to book a flight from Washington to Ontario right now. Can momondo alert me if prices change?

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing California