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Delaware

$71+ Cheap flights from Ontario (ONT) to Delaware

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ILG
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Cheap flight deals from Ontario to Delaware

Keep the following information in mind while searching for Ontario to Delaware flight deals. Data was last updated November 6, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$134
(CheapOair)

One-way from

$71
(Frontier)

Popular in

December

Cheapest in

August

Average price

$399
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From Ontario to Delaware
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One-way flight from Ontario to Delaware
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Highest demand for flights based on searches. 10% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Ontario to Delaware

Cheapest flights from Ontario to Delaware
Explore the most affordable flight options available from Ontario to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2025.

This CheapOair deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:20 pmONT - PHL
1 stop11h 11mFrontier
Mon 12/86:15 amPHL - ONT
1 stop13h 18mFrontier
Deal found 11/6$134
This CheapOair deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2712:58 amONT - PHL
1 stop24h 47mFrontier
Mon 12/86:15 amPHL - ONT
1 stop13h 18mFrontier
Deal found 11/6$137
This CheapOair deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:20 pmONT - PHL
1 stop11h 11mFrontier
Fri 12/128:36 pmPHL - ONT
1 stop20h 49mFrontier
Deal found 11/5$138
This CheapOair deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2112:58 amONT - PHL
1 stop24h 52mFrontier
Sun 12/78:36 pmPHL - ONT
1 stop20h 49mFrontier
Deal found 11/6$141
This CheapOair deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/83:20 pmONT - PHL
1 stop11h 11mFrontier
Fri 12/128:36 pmPHL - ONT
1 stop20h 49mFrontier
Deal found 11/6$142
This Frontier deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/227:08 pmONT - PHL
1 stop6h 42mFrontier
Tue 11/256:00 amPHL - ONT
1 stop12h 26mFrontier
Deal found 11/6$144
This Mytrip deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/3012:58 amONT - PHL
1 stop24h 47mFrontier
Fri 12/58:36 pmPHL - ONT
1 stop20h 49mFrontier
Deal found 11/5$150
This CheapOair deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1912:58 amONT - PHL
1 stop24h 47mFrontier
Fri 12/58:36 pmPHL - ONT
1 stop20h 49mFrontier
Deal found 11/6$180
This Kiwi.com deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:33 pmONT - PHL
1 stop26h 01mFrontier
Thu 12/114:12 pmPHL - ONT
1 stop28h 22mFrontier
Deal found 11/5$181
This Frontier deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2012:23 pmONT - PHL
1 stop13h 22mFrontier
Tue 11/256:00 amPHL - ONT
1 stop12h 26mFrontier
Deal found 11/6$183
This Kiwi.com deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:15 amONT - PHL
2 stops26h 03mFrontier
Wed 12/103:30 pmPHL - ONT
1 stop30h 05mFrontier
Deal found 11/4$187

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Delaware that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 6, 2025.
Use the filters below to find and compare flights from Ontario to Delaware that are best for you.

Fly from

Ontario

Fly to

Delaware

Route

Depart

Return

Price

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 3/3

1:10 pm-11:39 pm

1 stop7h 29m

Philadelphia

Wed 3/4

6:55 am-11:59 am

1 stop8h 04m

$317

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sat 12/13

12:12 pm-12:36 am

1 stop9h 24m

Philadelphia

Tue 1/6

5:40 am-11:54 am

1 stop9h 14m

$326

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Mon 12/15

6:00 am-5:40 pm

1 stop8h 40m

Philadelphia

Wed 1/7

7:00 am-12:16 pm

1 stop8h 16m

$326

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 1/13

11:53 am-6:03 pm

1 stop27h 10m

Philadelphia

Sat 1/24

7:06 pm-10:59 am

1 stop18h 53m

$354

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 1/13

11:53 am-6:03 pm

1 stop27h 10m

Philadelphia

Wed 1/21

7:06 pm-3:08 pm

1 stop23h 02m

$354

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sat 12/6

6:00 am-5:46 am

1 stop20h 46m

Philadelphia

Tue 12/16

6:54 pm-11:19 am

1 stop19h 25m

$374

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 12/11

7:33 pm-5:46 am

1 stop31h 13m

Philadelphia

Tue 12/16

7:06 am-11:19 am

1 stop31h 13m

$374

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 1/30

11:53 am-6:03 pm

1 stop27h 10m

Philadelphia

Sun 2/1

7:06 pm-3:08 pm

1 stop23h 02m

$375

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 1/13

11:53 am-6:03 pm

1 stop27h 10m

Philadelphia

Fri 1/23

7:06 pm-3:08 pm

1 stop23h 02m

$375

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 2/12

12:40 pm-10:40 pm

1 stop7h 00m

Philadelphia

Mon 2/16

6:45 pm-11:35 pm

1 stop7h 50m

$386

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Showing 1-10 of 24 results
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Best time to book a flight from Ontario to Delaware

Have a flexible travel schedule? Discover the best time to fly to Delaware from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Delaware
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Delaware. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Delaware?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Delaware from Ontario.

  • How long is the flight from Ontario to Delaware?

    For as low as $317, Delta can have you in Delaware from Ontario in 7h 29m. The distance between Ontario and Delaware is about 2349 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Ontario to Delaware that include hotel bookings?

    Yes. In addition to deals on Ontario to Delaware flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Delaware?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Delaware.

  • Can I find deals for business class flights from Ontario to Delaware?

    Yes. Cheapflights offers flight deals from Ontario to Delaware by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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