How does KAYAK find such low prices on flights from Washington to Ontario?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Ontario. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Ontario?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Washington is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Washington to Ontario?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Washington with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Ontario?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$75 CHEAP FLIGHTS from Washington to Ontario

ONT

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Cheap Flights from Washington to Ontario

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Washington to Ontario

mié., abr. 22 - mar., abr. 28

7:12 pm - 7:31 am

SEA

ONT

12h 19m

1 stop

12:59 am - 9:27 am

ONT

SEA

8h 28m

1 stop

$140Frontier

vie., may. 8 - lun., may. 11

12:33 pm - 10:05 am

GEG

ONT

21h 32m

1 stop

6:00 am - 11:38 am

ONT

GEG

5h 38m

1 stop

$140Frontier

sáb., abr. 25 - vie., may. 1

7:12 pm - 7:26 am

SEA

ONT

12h 14m

1 stop

5:33 pm - 9:27 am

ONT

SEA

15h 54m

1 stop

$141Frontier

jue., may. 21 - sáb., may. 23

11:51 am - 2:35 pm

SEA

ONT

2h 44mnonstop

4:04 pm - 7:05 pm

ONT

SEA

3h 01mnonstop

$143Frontier

sáb., abr. 25 - sáb., abr. 25

9:20 am - 2:19 pm

GEG

ONT

4h 59m

1 stop

12:59 am - 10:49 am

ONT

GEG

9h 50m

1 stop

$205Multiple Airlines

sáb., abr. 25 - sáb., abr. 25

9:20 am - 2:19 pm

GEG

ONT

4h 59m

1 stop

12:59 am - 10:49 am

ONT

GEG

9h 50m

1 stop

$207Multiple Airlines

jue., may. 28 - dom., may. 31

6:00 am - 12:19 pm

PSC

ONT

6h 19m

1 stop

6:45 am - 11:46 am

ONT

PSC

5h 01m

1 stop

$299Delta

sáb., abr. 25 - mar., abr. 28

4:19 pm - 10:32 pm

PSC

ONT

6h 13m

1 stop

3:26 pm - 9:42 pm

ONT

PSC

6h 16m

1 stop

$306Alaska Airlines

lun., may. 4 - mar., may. 12

7:19 pm - 11:59 pm

BLI

ONT

4h 40m

1 stop

10:48 am - 3:21 pm

ONT

BLI

4h 33m

1 stop

$313Alaska Airlines

sáb., abr. 18 - sáb., abr. 25

5:30 pm - 10:43 pm

PSC

ONT

5h 13m

1 stop

7:00 am - 11:48 am

ONT

PSC

4h 48m

1 stop

$323Delta

Useful Info

Low season	January
High season	July
Cheapest flight	$75

Flight from Portland to Ontario

Verified travelerFlew with Hawaiian Airlines

SEA

ONT

Jun 2025

Make sure to be there on time because the bag drop off can be a little complicated and it takes quite some time to get to the gate.

Verified travelerFlew with Alaska Airlines

SEA

ONT

Oct 2024

SeaTac lets you make an appointment to get through security. SpotSaver. No cost. Online.

How does KAYAK find such low prices on flights from Washington to Ontario?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Ontario.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Ontario?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Washington is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Washington to Ontario?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Washington with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Ontario?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to Ontario

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Information on the airport you'll fly into in Ontario

Ontario (ONT)

ONT

$75 Find Cheap Flights from Washington to Ontario

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

Cheap Flights from Washington to Ontario

Recent round-trip flight deals from Washington to Ontario

Recent one-way flight deals from Washington to Ontario

Recent last minute flight deals from Washington to Ontario

Recent direct flight deals from Washington to Ontario

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Flights from Washington to Ontario: the best tips from KAYAK users

FAQs for booking flights from Washington to Ontario

How does KAYAK find such low prices on flights from Washington to Ontario?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to Ontario.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Ontario?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Washington is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Washington to Ontario?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Washington with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Ontario?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario

Cabin class types available on flights to Washington

Complete your trip to Ontario with a hotel stay or car rental

Find direct flights for Ontario

Flights to other popular destinations

Flights from domestic origins to Ontario

Choose which airport to fly into in Ontario

Find deals for your return flight