Cheap Flights From Washington Dulles Intl. (IAD) To Los Angeles - Ontario Intl. (ONT)

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Cheapest Flights from Washington (IAD) to Ontario (ONT)

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were CA $438 round trip and CA $517 one way. Prices and availability subject to change. Additional terms may apply.

Wed, Aug. 6 - Thu, Aug. 21
IAD
Washington
ONT
Ontario
CA $438 Roundtrip, found 18 hours ago
CA $438
Roundtrip
found 18 hours ago
Select Delta flight, departing Wed, Aug. 6 from Washington to Ontario, returning Thu, Aug. 21, priced at CA $438 found 18 hours ago
Sat, Sep. 6 - Sat, Sep. 20
IAD
Washington
ONT
Ontario
CA $444 Roundtrip, found 18 hours ago
CA $444
Roundtrip
found 18 hours ago
Select Delta flight, departing Sat, Sep. 6 from Washington to Ontario, returning Sat, Sep. 20, priced at CA $444 found 18 hours ago
Tue, Aug. 12 - Fri, Aug. 29
IAD
Washington
ONT
Ontario
CA $445 Roundtrip, found 18 hours ago
CA $445
Roundtrip
found 18 hours ago
Select Delta flight, departing Tue, Aug. 12 from Washington to Ontario, returning Fri, Aug. 29, priced at CA $445 found 18 hours ago
Sat, Aug. 16 - Fri, Aug. 29
IAD
Washington
ONT
Ontario
CA $451 Roundtrip, found 18 hours ago
CA $451
Roundtrip
found 18 hours ago
Select Delta flight, departing Sat, Aug. 16 from Washington to Ontario, returning Fri, Aug. 29, priced at CA $451 found 18 hours ago
Wed, Aug. 20 - Sun, Sep. 7
IAD
Washington
ONT
Ontario
CA $506 Roundtrip, found 18 hours ago
CA $506
Roundtrip
found 18 hours ago
Select Hawaiian Airlines flight, departing Wed, Aug. 20 from Washington to Ontario, returning Sun, Sep. 7, priced at CA $506 found 18 hours ago
Thu, Aug. 28 - Tue, Sep. 9
IAD
Washington
ONT
Ontario
CA $508 Roundtrip, found 18 hours ago
CA $508
Roundtrip
found 18 hours ago
Select Delta flight, departing Thu, Aug. 28 from Washington to Ontario, returning Tue, Sep. 9, priced at CA $508 found 18 hours ago
Fri, Sep. 5 - Sat, Sep. 20
IAD
Washington
ONT
Ontario
CA $515 Roundtrip, found 18 hours ago
CA $515
Roundtrip
found 18 hours ago
Select Delta flight, departing Fri, Sep. 5 from Washington to Ontario, returning Sat, Sep. 20, priced at CA $515 found 18 hours ago
Thu, Aug. 21 - Sun, Sep. 7
IAD
Washington
ONT
Ontario
CA $576 Roundtrip, found 18 hours ago
CA $576
Roundtrip
found 18 hours ago
Select Alaska Airlines flight, departing Thu, Aug. 21 from Washington to Ontario, returning Sun, Sep. 7, priced at CA $576 found 18 hours ago
Thu, Aug. 21 - Mon, Sep. 1
IAD
Washington
ONT
Ontario
CA $576 Roundtrip, found 18 hours ago
CA $576
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Thu, Aug. 21 from Washington to Ontario, returning Mon, Sep. 1, priced at CA $576 found 18 hours ago
Sun, Aug. 24 - Thu, Sep. 11
IAD
Washington
ONT
Ontario
CA $581 Roundtrip, found 18 hours ago
CA $581
Roundtrip
found 18 hours ago
Select Delta flight, departing Sun, Aug. 24 from Washington to Ontario, returning Thu, Sep. 11, priced at CA $581 found 18 hours ago
Thu, Aug. 28 - Sun, Sep. 14
IAD
Washington
ONT
Ontario
CA $583 Roundtrip, found 18 hours ago
CA $583
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Thu, Aug. 28 from Washington to Ontario, returning Sun, Sep. 14, priced at CA $583 found 18 hours ago
Fri, Aug. 8 - Sat, Aug. 23
IAD
Washington
ONT
Ontario
CA $591 Roundtrip, found 18 hours ago
CA $591
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Fri, Aug. 8 from Washington to Ontario, returning Sat, Aug. 23, priced at CA $591 found 18 hours ago
Mon, Sep. 1 - Sun, Sep. 21
IAD
Washington
ONT
Ontario
CA $599 Roundtrip, found 18 hours ago
CA $599
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Mon, Sep. 1 from Washington to Ontario, returning Sun, Sep. 21, priced at CA $599 found 18 hours ago
Fri, Aug. 1 - Sun, Aug. 17
IAD
Washington
ONT
Ontario
CA $639 Roundtrip, found 18 hours ago
CA $639
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Fri, Aug. 1 from Washington to Ontario, returning Sun, Aug. 17, priced at CA $639 found 18 hours ago
Wed, Jul. 9 - Sat, Jul. 12
IAD
Washington
ONT
Ontario
CA $1,049 Roundtrip, found 1 day ago
CA $1,049
Roundtrip
found 1 day ago
Select Delta flight, departing Wed, Jul. 9 from Washington to Ontario, returning Sat, Jul. 12, priced at CA $1,049 found 1 day ago

Frequently asked questions

Are there direct flights from IAD to ONT?
You can't get a flight direct from IAD to Los Angeles - Ontario Intl. Airport (ONT), but there's no need to stress. United Airlines, Delta and American Airlines operate flights with only one stopover.
What airlines fly from IAD to Ontario Airport?
No airlines are currently offering direct flights between IAD and ONT. Save time and avoid unnecessary stopovers by investigating the best routes well in advance.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.

Popular Flight Routes from Washington (IAD)

Travelers at IAD love to visit these top cities. Roam to the top destinations from Washington (IAD) today with the cheap prices from Travelocity!

Popular Flight Routes from Ontario (ONT)

Travelers at ONT love to visit these top cities. Roam to the top destinations from Ontario(ONT) today with the cheap prices from Travelocity!

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.